Publications of Ilya Usoskin ordered by citations

A list of publications authored or co-authored by Ilya Usoskin, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0001-8227-9081

658	Unusual activity of the Sun during recent decades compared to the previous 11,000 years Solanki, S. K., Usoskin, I. G., Kromer, B., Schüssler, M. & Beer, J., 2004, Nature, 431, 1084
351	Solar forcing for CMIP6 (v3.2) Matthes, Katja, Funke, Bernd, Andersson, Monika E., Barnard, Luke, Beer, Jürg, Charbonneau, Paul, Clilverd, Mark A., Dudok de Wit, Thierry, Haberreiter, Margit, Hendry, Aaron, Jackman, Charles H., Kretzschmar, Matthieu, Kruschke, Tim, Kunze, Markus, Langematz, Ulrike, Marsh, Daniel R., Maycock, Amanda C., Misios, Stergios, Rodger, Craig J., Scaife, Adam A., Seppälä, Annika, Shangguan, Ming, Sinnhuber, Miriam, Tourpali, Kleareti, Usoskin, Ilya, van de Kamp, Max, Verronen, Pekka T. & Versick, Stefan, 2017, Geoscientific Model Development, 10, 2247
329	A history of solar activity over millennia Usoskin, Ilya G., 2017, Living Reviews in Solar Physics, 14, 3
328	Grand minima and maxima of solar activity: new observational constraints Usoskin, I. G., Solanki, S. K. & Kovaltsov, G. A., 2007, A&A, 471, 301
322	Heliospheric modulation of cosmic rays: Monthly reconstruction for 1951-2004 Usoskin, Ilya G., Alanko-Huotari, Katja, Kovaltsov, Gennady A. & Mursula, Kalevi, 2005, Journal of Geophysical Research (Space Physics), 110, A12108
290	Properties of Ground Level Enhancement Events and the Associated Solar Eruptions During Solar Cycle 23 Gopalswamy, N., Xie, H., Yashiro, S., Akiyama, S., Mäkelä, P. & Usoskin, I. G., 2012, Space Science Reviews, 171, 23
279	Cosmic protons Alcaraz, J., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Béné, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Boschini, M., Bourquin, M., Brocco, L., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Castellini, G., Cecchi, C., Chang, Y. H., Chen, H. F., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Crespo, P., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Dinu, N., Djambazov, L., D'Antone, I., Dong, Z. R., Emonet, P., Engelberg, J., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Fiandrini, E., Fisher, P. H., Fluegge, G., Fouque, N., Galaktionov, Y., Gervasi, M., Giusti, P., Grandi, D., Grimm, O., Gu, W. Q., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Jongmanns, M., Karlamaa, K., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Kossakowski, R., Koutsenko, V., Kraeber, M., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Liu, C. L., Liu, H. T., Lopes, I., Lu, G., Lu, Y. S., Lübelsmeyer, K., Luckey, D., Lustermann, W., Maña, C., Margotti, A., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mihul, A., Mourao, A., Mujunen, A., Palmonari, F., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pimenta, M., Plyaskin, V., Pojidaev, V., Pohl, M., Postolache, V., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Scolieri, G., Seo, E. S., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, S. C. C., Ting, S. M., Tornikoski, M., Torsti, J., Trümper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velcea, F., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vité, D., Von Gunten, H., Waldmeier Wicki, S., Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wiik, K., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Ye, S. W., Yeh, P., Xu, Z. Z., Zhang, H. Y., Zhang, Z. P., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L., Zichichi, A. & Zimmermann, B., 2000, Physics Letters B, 490, 27
256	Evolution of the solar irradiance during the Holocene Vieira, L. E. A., Solanki, S. K., Krivova, N. A. & Usoskin, I., 2011, A&A, 531, A6
250	Leptons in near earth orbit Alcaraz, J., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Béné, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Boschini, M., Bourquin, M., Brocco, L., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Castellini, G., Cecchi, C., Chang, Y. H., Chen, H. F., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Crespo, P., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Dinu, N., Djambazov, L., D'Antone, I., Dong, Z. R., Emonet, P., Engelberg, J., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Fiandrini, E., Fisher, P. H., Fluegge, G., Fouque, N., Galaktionov, Y., Gervasi, M., Giusti, P., Grandi, D., Grimm, O., Gu, W. Q., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Jongmanns, M., Karlamaa, K., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Kossakowski, R., Koutsenko, V., Kraeber, M., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Liu, C. L., Liu, H. T., Lopes, I., Lu, G., Lu, Y. S., Lübelsmeyer, K., Luckey, D., Lustermann, W., Maña, C., Margotti, A., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mihul, A., Mourao, A., Mujunen, A., Palmonari, F., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pimenta, M., Plyaskin, V., Pojidaev, V., Postolache, V., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Scolieri, G., Seo, E. S., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, S. C. C., Ting, S. M., Tornikoski, M., Torsti, J., Trümper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velcea, F., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vité, D., Von Gunten, H., Waldmeier Wicki, S., Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wiik, K., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Ye, S. W., Yeh, P., Xu, Z. Z., Zhang, H. Y., Zhang, Z. P., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L., Zichichi, A. & Zimmermann, B., 2000, Physics Letters B, 484, 10
233	Cosmic Ray Induced Ion Production in the Atmosphere Bazilevskaya, G. A., Usoskin, I. G., Flückiger, E. O., Harrison, R. G., Desorgher, L., Bütikofer, R., Krainev, M. B., Makhmutov, V. S., Stozhkov, Y. I., Svirzhevskaya, A. K., Svirzhevsky, N. S. & Kovaltsov, G. A., 2008, Space Science Reviews, 137, 149
224	Active longitudes in sunspot activity: Century scale persistence Berdyugina, S. V. & Usoskin, I. G., 2003, A&A, 405, 1121
216	Energetic Particle Influence on the Earth's Atmosphere Mironova, Irina A., Aplin, Karen L., Arnold, Frank, Bazilevskaya, Galina A., Harrison, R. Giles, Krivolutsky, Alexei A., Nicoll, Keri A., Rozanov, Eugene V., Turunen, Esa & Usoskin, Ilya G., 2015, Space Science Reviews, 194, 1
210	Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers Usoskin, Ilya G., Bazilevskaya, Galina A. & Kovaltsov, Gennady A., 2011, Journal of Geophysical Research (Space Physics), 116, A02104
201	The AD775 cosmic event revisited: the Sun is to blame Usoskin, I. G., Kromer, B., Ludlow, F., Beer, J., Friedrich, M., Kovaltsov, G. A., Solanki, S. K. & Wacker, L., 2013, A&A, 552, L3
193	Protons in near earth orbit Alcaraz, J., Alvisi, D., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Béné, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Boschini, M., Bourquin, M., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Cavalletti, R., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Castellini, G., Chang, Y. H., Chen, H. F., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiarini, A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Cotta-Ramusino, A., Crespo, P., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Dinu, N., Djambazov, L., D'Antone, I., Dong, Z. R., Emonet, P., Engelberg, J., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Feng, C. C., Fiandrini, E., Finelli, F., Fisher, P. H., Flaminio, R., Fluegge, G., Fouque, N., Galaktionov, Y., Gervasi, M., Giusti, P., Grandi, D., Gu, W. Q., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Jongmanns, M., Karlamaa, K., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Kossakowski, R., Koutsenko, V., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Liu, C. L., Liu, H. T., Lolli, M., Lopes, I., Lu, G., Lu, Y. S., Lübelsmeyer, K., Luckey, D., Lustermann, W., Maña, C., Margotti, A., Massera, F., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mezzanotte, F., Mezzenga, R., Mihul, A., Molinari, G., Mourao, A., Mujunen, A., Palmonari, F., Pancaldi, G., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pilastrini, R., Pimenta, M., Plyaskin, V., Pojidaev, V., Postema, H., Postolache, V., Prati, E., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Recupero, S., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Santos, D., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Seo, E. S., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, S. C. C., Ting, S. M., Tornikoski, M., Torromeo, G., Torsti, J., Trümper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velcea, F., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vité, D., Von Gunten, H., Waldmeier Wicki, S., Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wiik, K., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Ye, S. W., Yeh, P., Xu, Z. Z., Zhang, H. Y., Zhang, Z. P., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L. & Zichichi, A., 2000, Physics Letters B, 472, 215
192	The Maunder minimum (1645-1715) was indeed a grand minimum: A reassessment of multiple datasets Usoskin, Ilya G., Arlt, Rainer, Asvestari, Eleanna, Hawkins, Ed, Käpylä, Maarit, Kovaltsov, Gennady A., Krivova, Natalie, Lockwood, Michael, Mursula, Kalevi, O'Reilly, Jezebel, Owens, Matthew, Scott, Chris J., Sokoloff, Dmitry D., Solanki, Sami K., Soon, Willie & Vaquero, José M., 2015, A&A, 581, A95
182	The PMIP4 contribution to CMIP6 - Part 3: The last millennium, scientific objective, and experimental design for the PMIP4 past1000 simulations Jungclaus, Johann H., Bard, Edouard, Baroni, Mélanie, Braconnot, Pascale, Cao, Jian, Chini, Louise P., Egorova, Tania, Evans, Michael, Fidel González-Rouco, J., Goosse, Hugues, Hurtt, George C., Joos, Fortunat, Kaplan, Jed O., Khodri, Myriam, Klein Goldewijk, Kees, Krivova, Natalie, LeGrande, Allegra N., Lorenz, Stephan J., Luterbacher, Jürg, Man, Wenmin, Maycock, Amanda C., Meinshausen, Malte, Moberg, Anders, Muscheler, Raimund, Nehrbass-Ahles, Christoph, Otto-Bliesner, Bette I., Phipps, Steven J., Pongratz, Julia, Rozanov, Eugene, Schmidt, Gavin A., Schmidt, Hauke, Schmutz, Werner, Schurer, Andrew, Shapiro, Alexander I., Sigl, Michael, Smerdon, Jason E., Solanki, Sami K., Timmreck, Claudia, Toohey, Matthew, Usoskin, Ilya G., Wagner, Sebastian, Wu, Chi-Ju, Leng Yeo, Kok, Zanchettin, Davide, Zhang, Qiong & Zorita, Eduardo, 2017, Geoscientific Model Development, 10, 4005
181	Dynamics of the Earth's Particle Radiation Environment Vainio, Rami, Desorgher, Laurent, Heynderickx, Daniel, Storini, Marisa, Flückiger, Erwin, Horne, Richard B., Kovaltsov, Gennady A., Kudela, Karel, Laurenza, Monica, McKenna-Lawlor, Susan, Rothkaehl, Hanna & Usoskin, Ilya G., 2009, Space Science Reviews, 147, 187
160	Millennium-Scale Sunspot Number Reconstruction: Evidence for an Unusually Active Sun since the 1940s Usoskin, Ilya G., Solanki, Sami K., Schüssler, Manfred, Mursula, Kalevi & Alanko, Katja, 2003, Physical Review Letters, 91, 211101
160	A History of Solar Activity over Millennia Usoskin, Ilya G., 2013, Living Reviews in Solar Physics, 10, 1
153	Helium in near Earth orbit AMS Collaboration, Alcaraz, J., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Béné, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Boschini, M., Bourquin, M., Brocco, L., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Castellini, G., Cecchi, C., Chang, Y. H., Chen, H. F., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Dinu, N., Djambazov, L., D'Antone, I., Dong, Z. R., Emonet, P., Engelberg, J., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Fiandrini, E., Fisher, P. H., Fluegge, G., Fouque, N., Galaktionov, Yu., Gervasi, M., Giusti, P., Grandi, D., Grimm, O., Gu, W. Q., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Jongmanns, M., Karlamaa, K., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Kossakowski, R., Koutsenko, V., Kraeber, M., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Liu, C. L., Liu, H. T., Lopes, I., Lu, G., Lu, Y. S., Lübelsmeyer, K., Luckey, D., Lustermann, W., Maña, C., Margotti, A., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mihul, A., Mourao, A., Mujunen, A., Palmonari, F., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pimenta, M., Plyaskin, V., Pojidaev, V., Pohl, M., Postolache, V., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Scolieri, G., Seo, E. S., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, S. C. C., Ting, S. M., Tornikoski, M., Torsti, J., Trümper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velcea, F., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vité, D., Von Gunten, H., Waldmeier Wicki, S., Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wiik, K., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Ye, S. W., Yeh, P., Xu, Z. Z., Zhang, H. Y., Zhang, Z. P., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L., Zichichi, A., Zimmermann, B. & Zuccon, P., 2000, Physics Letters B, 494, 193
151	Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records Schrijver, C. J., Beer, J., Baltensperger, U., Cliver, E. W., Güdel, M., Hudson, H. S., McCracken, K. G., Osten, R. A., Peter, T., Soderblom, D. R., Usoskin, I. G. & Wolff, E. W., 2012, Journal of Geophysical Research (Space Physics), 117, A08103
148	Long-Term Solar Cycle Evolution: Review of Recent Developments Usoskin, I. G. & Mursula, K., 2003, Solar Physics, 218, 319
140	Cosmic ray induced ionization in the atmosphere: Full modeling and practical applications Usoskin, Ilya G. & Kovaltsov, Gennady A., 2006, Journal of Geophysical Research (Atmospheres), 111, D21206
136	Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006-2010 Usoskin, Ilya G., Gil, Agnieszka, Kovaltsov, Gennady A., Mishev, Alexander L. & Mikhailov, Vladimir V., 2017, Journal of Geophysical Research (Space Physics), 122, 3875
130	Applications and usage of the real-time Neutron Monitor Database Mavromichalaki, H., Papaioannou, A., Plainaki, C., Sarlanis, C., Souvatzoglou, G., Gerontidou, M., Papailiou, M., Eroshenko, E., Belov, A., Yanke, V., Flückiger, E. O., Bütikofer, R., Parisi, M., Storini, M., Klein, K.-L., Fuller, N., Steigies, C. T., Rother, O. M., Heber, B., Wimmer-Schweingruber, R. F., Kudela, K., Strharsky, I., Langer, R., Usoskin, I., Ibragimov, A., Chilingaryan, A., Hovsepyan, G., Reymers, A., Yeghikyan, A., Kryakunova, O., Dryn, E., Nikolayevskiy, N., Dorman, L. & Pustil'Nik, L., 2011, Advances in Space Research, 47, 2210
129	Search for antihelium in cosmic rays. Alcaraz, J., Alvisi, D., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Bene, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Bourquin, M., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Cavalletti, R., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Catellini, G., Chang, Y. H., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiarini, A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Cotta-Ramusino, A., Crespo, P., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Ding, L. K., Dinu, N., Djambazov, L., D'Antone, I., Dong, Z. R., Emonet, P., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Feng, C. C., Fiandrini, E., Finelli, F., Fisher, P. H., Flaminio, R., Fluegge, G., Fouque, N., Galaktionov, Yu., Gervasi, M., Giusti, P., Gu, W. Q., Guzik, T. G., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Isbert, J., Jongmanns, M., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Krieger, J., Kossakowski, R., Koutsenko, V., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Li, T. P., Liu, H. T., Lolli, M., Lopes, I., Lu, G., Lu, Y. S., Lubelsmeyer, K., Luckey, D., Lustermann, W., Maehlum, G., Mana, C., Margotti, A., Massera, F., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mezzanotte, F., Mezzenga, R., Mihul, A., Molinari, G., Mourao, A., Mujunen, A., Palmonari, F., Pancaldi, G., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pilastrini, R., Pimenta, M., Plyaskin, V., Pojidaev, V., Postema, H., Prati, E., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Recupero, S., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Santos, D., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, S. C. C., Ting, S. M., Tenbusch, F., Torromeo, G., Torsti, J., Trumper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vite, D., von Gunten, H., Waldmeier Wicki, S., Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wefel, J. P., Werner, E. A., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Yeh, P., Zhang, H. Y., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L. & Zichichi, A., 1999, Physics Letters B, 461, 387
126	A new model of cosmogenic production of radiocarbon 14C in the atmosphere Kovaltsov, Gennady A., Mishev, Alexander & Usoskin, Ilya G., 2012, Earth and Planetary Science Letters, 337, 114
125	Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima Usoskin, I. G., Gallet, Y., Lopes, F., Kovaltsov, G. A. & Hulot, G., 2016, A&A, 587, A150
111	A physical reconstruction of cosmic ray intensity since 1610 Usoskin, Ilya G., Mursula, Kalevi, Solanki, Sami K., Schüssler, Manfred & Kovaltsov, Gennady A., 2002, Journal of Geophysical Research (Space Physics), 107, 1374
110	A New Calibrated Sunspot Group Series Since 1749: Statistics of Active Day Fractions Usoskin, I. G., Kovaltsov, G. A., Lockwood, M., Mursula, K., Owens, M. & Solanki, S. K., 2016, Solar Physics, 291, 2685
109	Production of cosmogenic isotopes 7Be, 10Be, 14C, 22Na, and 36Cl in the atmosphere: Altitudinal profiles of yield functions Poluianov, S. V., Kovaltsov, G. A., Mishev, A. L. & Usoskin, I. G., 2016, Journal of Geophysical Research (Atmospheres), 121, 8125
109	A history of solar activity over millennia Usoskin, Ilya G., 2023, Living Reviews in Solar Physics, 20, 2
108	The First Ground Level Enhancement Event of Solar Cycle 24: Direct Observation of Shock Formation and Particle Release Heights Gopalswamy, N., Xie, H., Akiyama, S., Yashiro, S., Usoskin, I. G. & Davila, J. M., 2013, ApJ, 765, L30
105	A review of Holocene solar-linked climatic variation on centennial to millennial timescales: Physical processes, interpretative frameworks and a new multiple cross-wavelet transform algorithm Soon, Willie, Velasco Herrera, Victor M., Selvaraj, Kandasamy, Traversi, Rita, Usoskin, Ilya, Chen, Chen-Tung Arthur, Lou, Jiann-Yuh, Kao, Shuh-Ji, Carter, Robert M., Pipin, Valery, Severi, Mirko & Becagli, Silvia, 2014, Earth Science Reviews, 134, 1
104	Occurrence of Extreme Solar Particle Events: Assessment from Historical Proxy Data Usoskin, Ilya G. & Kovaltsov, Gennady A., 2012, ApJ, 757, 92
103	Evidence for distinct modes of solar activity Usoskin, I. G., Hulot, G., Gallet, Y., Roth, R., Licht, A., Joos, F., Kovaltsov, G. A., Thébault, E. & Khokhlov, A., 2014, A&A, 562, L10
100	Solar total and spectral irradiance reconstruction over the last 9000 years Wu, C.-J., Krivova, N. A., Solanki, S. K. & Usoskin, I. G., 2018, A&A, 620, A120
98	Sunspot positions and sizes for 1825-1867 from the observations by Samuel Heinrich Schwabe Arlt, R., Leussu, R., Giese, N., Mursula, K. & Usoskin, I. G., 2013, MNRAS, 433, 3165
97	The first SEPServer event catalogue ~68-MeV solar proton events observed at 1 AU in 1996-2010 Vainio, Rami, Valtonen, Eino, Heber, Bernd, Malandraki, Olga E., Papaioannou, Athanasios, Klein, Karl-Ludwig, Afanasiev, Alexander, Agueda, Neus, Aurass, Henry, Battarbee, Markus, Braune, Stephan, Dröge, Wolfgang, Ganse, Urs, Hamadache, Clarisse, Heynderickx, Daniel, Huttunen-Heikinmaa, Kalle, Kiener, Jürgen, Kilian, Patrick, Kopp, Andreas, Kouloumvakos, Athanasios, Maisala, Sami, Mishev, Alexander, Miteva, Rositsa, Nindos, Alexander, Oittinen, Tero, Raukunen, Osku, Riihonen, Esa, Rodríguez-Gasén, Rosa, Saloniemi, Oskari, Sanahuja, Blai, Scherer, Renate, Spanier, Felix, Tatischeff, Vincent, Tziotziou, Kostas, Usoskin, Ilya G. & Vilmer, Nicole, 2013, Journal of Space Weather and Space Climate, 3, A12
95	Correlative study of solar activity and cosmic ray intensity Usoskin, I. G., Kananen, H., Mursula, K., Tanskanen, P. & Kovaltsov, G. A., 1998, Journal of Geophysical Research, 103, 9567
93	Revisited Sunspot Data: A New Scenario for the Onset of the Maunder Minimum Vaquero, José M., Gallego, M. C., Usoskin, Ilya G. & Kovaltsov, Gennady A., 2011, ApJ, 731, L24
92	Reconstruction of solar activity for the last millennium using 10Be data Usoskin, I. G., Mursula, K., Solanki, S., Schüssler, M. & Alanko, K., 2004, A&A, 413, 745
86	Solar activity over nine millennia: A consistent multi-proxy reconstruction Wu, C. J., Usoskin, I. G., Krivova, N., Kovaltsov, G. A., Baroni, M., Bard, E. & Solanki, S. K., 2018, A&A, 615, A93
86	A Solar Cycle Lost in 1793-1800: Early Sunspot Observations Resolve the Old Mystery Usoskin, Ilya G., Mursula, Kalevi, Arlt, Rainer & Kovaltsov, Gennady A., 2009, ApJ, 700, L154
85	GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron Monitors Poluianov, S. V., Usoskin, I. G., Mishev, A. L., Shea, M. A. & Smart, D. F., 2017, Solar Physics, 292, 176
84	Ionization of the earth's atmosphere by solar and galactic cosmic rays Usoskin, Ilya G., Desorgher, Laurent, Velinov, Peter, Storini, Marisa, Flückiger, Erwin O., Bütikofer, Rolf & Kovaltsov, Gennady A., 2009, Acta Geophysica, 57, 88
83	New reconstruction of the sunspot group numbers since 1739 using direct calibration and "backbone" methods Chatzistergos, Theodosios, Usoskin, Ilya G., Kovaltsov, Gennady A., Krivova, Natalie A. & Solanki, Sami K., 2017, A&A, 602, A69
83	A History of Solar Activity over Millennia Usoskin, Ilya G., 2008, Living Reviews in Solar Physics, 5, 3
81	Level and length of cyclic solar activity during the Maunder minimum as deduced from the active-day statistics Vaquero, J. M., Kovaltsov, G. A., Usoskin, I. G., Carrasco, V. M. S. & Gallego, M. C., 2015, A&A, 577, A71
80	Persistent 22-year cycle in sunspot activity: Evidence for a relic solar magnetic field Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2001, Solar Physics, 198, 51
77	Solar Grand Minima and Random Fluctuations in Dynamo Parameters Moss, D., Sokoloff, D., Usoskin, I. & Tutubalin, V., 2008, Solar Physics, 250, 221
77	Ionization effect of solar particle GLE events in low and middle atmosphere Usoskin, I. G., Kovaltsov, G. A., Mironova, I. A., Tylka, A. J. & Dietrich, W. F., 2011, Atmospheric Chemistry & Physics, 11, 1979
76	Middle atmosphere response to the solar cycle in irradiance and ionizing particle precipitation Semeniuk, K., Fomichev, V. I., McConnell, J. C., Fu, C., Melo, S. M. L. & Usoskin, I. G., 2011, Atmospheric Chemistry & Physics, 11, 5045
74	Inferring the Structure of the Solar Corona and Inner Heliosphere During the Maunder Minimum Using Global Thermodynamic Magnetohydrodynamic Simulations Riley, Pete, Lionello, Roberto, Linker, Jon A., Cliver, Ed, Balogh, Andre, Beer, Jürg, Charbonneau, Paul, Crooker, Nancy, DeRosa, Marc, Lockwood, Mike, Owens, Matt, McCracken, Ken, Usoskin, Ilya & Koutchmy, S., 2015, ApJ, 802, 105
74	A new 3D numerical model of cosmogenic nuclide 10Be production in the atmosphere Kovaltsov, Gennady A. & Usoskin, Ilya G., 2010, Earth and Planetary Science Letters, 291, 182
74	Heliospheric modulation of cosmic rays and solar activity during the Maunder minimum Usoskin, Ilya G., Mursula, Kalevi & Kovaltsov, Gennady A., 2001, Journal of Geophysical Research, 106, 16039
72	The Maunder minimum and the Little Ice Age: an update from recent reconstructions and climate simulations Owens, Mathew J., Lockwood, Mike, Hawkins, Ed, Usoskin, Ilya, Jones, Gareth S., Barnard, Luke, Schurer, Andrew & Fasullo, John, 2017, Journal of Space Weather and Space Climate, 7, A33
72	Solar proton events in cosmogenic isotope data Usoskin, Ilya G., Solanki, Sami K., Kovaltsov, Gennady A., Beer, Jürg & Kromer, Bernd, 2006, Geophysical Research Letters, 33, L08107
72	Recalibration of the Sunspot-Number: Status Report Clette, F., Lefèvre, L., Chatzistergos, T., Hayakawa, H., Carrasco, V. M. S., Arlt, R., Cliver, E. W., Dudok de Wit, T., Friedli, T. K., Karachik, N., Kopp, G., Lockwood, M., Mathieu, S., Muñoz-Jaramillo, A., Owens, M., Pesnell, D., Pevtsov, A., Svalgaard, L., Usoskin, I. G., van Driel-Gesztelyi, L. & Vaquero, J. M., 2023, Solar Physics, 298, 44
71	Cosmic ray-induced ionization in the atmosphere: spatial and temporal changes Usoskin, I. G., Gladysheva, O. G. & Kovaltsov, G. A., 2004, Journal of Atmospheric and Solar-Terrestrial Physics, 66, 1791
68	Neutron monitor yield function: New improved computations Mishev, A. L., Usoskin, I. G. & Kovaltsov, G. A., 2013, Journal of Geophysical Research (Space Physics), 118, 2783
68	Was one sunspot cycle lost in late XVIII century? Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, A&A, 370, L31
67	Analysis of the ground level enhancement on 17 May 2012 using data from the global neutron monitor network Mishev, A. L., Kocharov, L. G. & Usoskin, I. G., 2014, Journal of Geophysical Research (Space Physics), 119, 670
66	Preferred sunspot longitudes: non-axisymmetry and differential rotation Usoskin, I. G., Berdyugina, S. V. & Poutanen, J., 2005, A&A, 441, 347
66	Atmospheric impacts of the strongest known solar particle storm of 775 AD Sukhodolov, Timofei, Usoskin, Ilya, Rozanov, Eugene, Asvestari, Eleanna, Ball, William T., Curran, Mark A. J., Fischer, Hubertus, Kovaltsov, Gennady, Miyake, Fusa, Peter, Thomas, Plummer, Christopher, Schmutz, Werner, Severi, Mirko & Traversi, Rita, 2017, Scientific Reports, 7, 45257
66	Heliospheric modulation of galactic cosmic rays during grand solar minima: Past and future variations Owens, M. J., Usoskin, I. & Lockwood, M., 2012, Geophysical Research Letters, 39, L19102
64	Cosmic ray induced ionization model CRAC:CRII: An extension to the upper atmosphere Usoskin, Ilya G., Kovaltsov, Gennady A. & Mironova, Irina A., 2010, Journal of Geophysical Research (Atmospheres), 115, D10302
62	Cyclic behaviour of sunspot activity during the Maunder minimum Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2000, A&A, 354, L33
61	Grand Minima of Solar Activity and the Mean-Field Dynamo Usoskin, I. G., Sokoloff, D. & Moss, D., 2009, Solar Physics, 254, 345
60	Influence of Galactic Cosmic Rays on atmospheric composition and dynamics Calisto, M., Usoskin, I., Rozanov, E. & Peter, T., 2011, Atmospheric Chemistry & Physics, 11, 4547
60	Production of cosmogenic 7Be isotope in the atmosphere: Full 3-D modeling Usoskin, Ilya G. & Kovaltsov, Gennady A., 2008, Journal of Geophysical Research (Atmospheres), 113, D12107
57	Active longitudes, nonaxisymmetric dynamos and phase mixing Berdyugina, S. V., Moss, D., Sokoloff, D. & Usoskin, I. G., 2006, A&A, 445, 703
57	First Analysis of Ground-Level Enhancement (GLE) 72 on 10 September 2017: Spectral and Anisotropy Characteristics Mishev, A., Usoskin, I., Raukunen, O., Paassilta, M., Valtonen, E., Kocharov, L. & Vainio, R., 2018, Solar Physics, 293, 136
57	Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer Aguilar, M., Ali Cavasonza, L., Ambrosi, G., Arruda, L., Attig, N., Bachlechner, A., Barao, F., Barrau, A., Barrin, L., Bartoloni, A., Bașeǧmez-du Pree, S., Battiston, R., Becker, U., Behlmann, M., Beischer, B., Berdugo, J., Bertucci, B., Bindi, V., de Boer, W., Bollweg, K., Borgia, B., Boschini, M. J., Bourquin, M., Bueno, E. F., Burger, J., Burger, W. J., Cai, X. D., Capell, M., Caroff, S., Casaus, J., Castellini, G., Cervelli, F., Chang, Y. H., Chen, G. M., Chen, H. S., Chen, Y., Cheng, L., Chou, H. Y., Choutko, V., Chung, C. H., Clark, C., Coignet, G., Consolandi, C., Contin, A., Corti, C., Cui, Z., Dadzie, K., Dai, Y. M., Datta, A., Delgado, C., Della Torre, S., Demirköz, M. B., Derome, L., Di Falco, S., Di Felice, V., Díaz, C., Dimiccoli, F., von Doetinchem, P., Dong, F., Donnini, F., Duranti, M., Egorov, A., Eline, A., Feng, J., Fiandrini, E., Fisher, P., Formato, V., Galaktionov, Y., Gámez, C., García-López, R. J., Gargiulo, C., Gast, H., Gebauer, I., Gervasi, M., Giovacchini, F., Gómez-Coral, D. M., Gong, J., Goy, C., Grabski, V., Grandi, D., Graziani, M., Guo, K. H., Haino, S., Han, K. C., He, Z. H., Hsieh, T. H., Huang, H., Huang, Z. C., Incagli, M., Jang, W. Y., Jia, Yi, Jinchi, H., Kanishev, K., Khiali, B., Kim, G. N., Kirn, Th., Konyushikhin, M., Kounina, O., Kounine, A., Koutsenko, V., Kulemzin, A., La Vacca, G., Laudi, E., Laurenti, G., Lazzizzera, I., Lebedev, A., Lee, H. T., Lee, S. C., Li, J. Q., Li, Q., Li, T. X., Li, Z. H., Light, C., Lin, C. H., Lippert, T., Liu, Z., Lu, S. Q., Lu, Y. S., Luebelsmeyer, K., Luo, F., Luo, J. Z., Luo, Xi, Lyu, S. S., Machate, F., Mañá, C., Marín, J., Martin, T., Martínez, G., Masi, N., Maurin, D., Menchaca-Rocha, A., Meng, Q., Mo, D. C., Molero, M., Mott, P., Mussolin, L., Nelson, T., Ni, J. Q., Nikonov, N., Nozzoli, F., Oliva, A., Orcinha, M., Palermo, M., Palmonari, F., Paniccia, M., Pashnin, A., Pauluzzi, M., Pensotti, S., Phan, H. D., Plyaskin, V., Poireau, V., Poluianov, S., Popkow, A., Qi, X. M., Qin, X., Qu, Z. Y., Quadrani, L., Rancoita, P. G., Rapin, D., Reina Conde, A., Rosier-Lees, S., Rozhkov, A., Rozza, D., Sagdeev, R., Schael, S., Schmidt, S. M., Schulz von Dratzig, A., Schwering, G., Seo, E. S., Shan, B. S., Shi, J. Y., Siedenburg, T., Solano, C., Song, J. W., Sun, Z. T., Tacconi, M., Tang, X. W., Tang, Z. C., Tian, J., Ting, Samuel C. C., Ting, S. M., Tomassetti, N., Torsti, J., Tüysüz, C., Urban, T., Usoskin, I., Vagelli, V., Vainio, R., Valente, E., Valtonen, E., Vázquez Acosta, M., Vecchi, M., Velasco, M., Vialle, J. P., Wang, L. Q., Wang, N. H., Wang, Q. L., Wang, X., Wang, X. Q., Wang, Z. X., Wei, J., Weng, Z. L., Wu, H., Xiong, R. Q., Xu, W., Yan, Q., Yang, Y., Yi, H., Yu, Y. J., Yu, Z. Q., Zannoni, M., Zeissler, S., Zhang, C., Zhang, F., Zhang, J. H., Zhang, Z., Zhao, F., Zheng, Z. M., Zhuang, H. L., Zhukov, V., Zichichi, A., Zimmermann, N., Zuccon, P. & AMS Collaboration, 2019, Physical Review Letters, 123, 181102
57	Latitudinal dependence of low cloud amount on cosmic ray induced ionization Usoskin, I. G., Marsh, N., Kovaltsov, G. A., Mursula, K. & Gladysheva, O. G., 2004, Geophysical Research Letters, 31, L16109
56	Updated Neutron-Monitor Yield Function: Bridging Between In Situ and Ground-Based Cosmic Ray Measurements Mishev, Alexander L., Koldobskiy, Sergey A., Kovaltsov, Gennady A., Gil, Agnieszka & Usoskin, Ilya G., 2020, Journal of Geophysical Research (Space Physics), 125, e27433
55	The first ground-level enhancement of solar cycle 25 on 28 October 2021 Papaioannou, A., Kouloumvakos, A., Mishev, A., Vainio, R., Usoskin, I., Herbst, K., Rouillard, A. P., Anastasiadis, A., Gieseler, J., Wimmer-Schweingruber, R. & Kühl, P., 2022, A&A, 660, L5
55	Solar activity reconstructed over the last 7000 years: The influence of geomagnetic field changes Usoskin, I. G., Solanki, S. K. & Korte, M., 2006, Geophysical Research Letters, 33, L08103
54	Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation Kulmala, M., Riipinen, I., Nieminen, T., Hulkkonen, M., Sogacheva, L., Manninen, H. E., Paasonen, P., Petäjä, T., Dal Maso, M., Aalto, P. P., Viljanen, A., Usoskin, I., Vainio, R., Mirme, S., Mirme, A., Minikin, A., Petzold, A., Hõrrak, U., Plaß-Dülmer, C., Birmili, W. & Kerminen, V.-M., 2010, Atmospheric Chemistry & Physics, 10, 1885
53	Revised historical solar irradiance forcing Egorova, T., Schmutz, W., Rozanov, E., Shapiro, A. I., Usoskin, I., Beer, J., Tagirov, R. V. & Peter, T., 2018, A&A, 615, A85
52	On Magnetospheric Transmissivity of Cosmic Rays Kudela, K. & Usoskin, I. G., 2004, Czechoslovak Journal of Physics, 54, 239
50	Solar superstorm of AD 774 recorded subannually by Arctic tree rings Uusitalo, J., Arppe, L., Hackman, T., Helama, S., Kovaltsov, G., Mielikäinen, K., Mäkinen, H., Nöjd, P., Palonen, V., Usoskin, I. & Oinonen, M., 2018, Nature Communications, 9, 3495
49	Neutron and electromagnetic emissions during the 1990 May 24 solar flare Kocharov, L. G., Lee, Jeongwoo W., Zirin, H., Kovaltsov, G. A., Usoskin, I. G., Pyle, K. R., Shea, M. A. & Smart, D. F., 1994, Solar Physics, 155, 149
48	Long-Term Modulation of Solar Cycles Biswas, Akash, Karak, Bidya Binay, Usoskin, Ilya & Weisshaar, Eckhard, 2023, Space Science Reviews, 219, 19
48	Extreme Solar Particle Storms; The hostile Sun Miyake, Fusa, Usoskin, Ilya & Poluianov, Stepan, 2019,
48	Different response of clouds to solar input Voiculescu, Mirela, Usoskin, Ilya G. & Mursula, Kalevi, 2006, Geophysical Research Letters, 33, L21802
47	Eccentric dipole approximation of the geomagnetic field: Application to cosmic ray computations Nevalainen, J., Usoskin, I. G. & Mishev, A., 2013, Advances in Space Research, 52, 22
47	Variations of the solar cycle profile in a solar dynamo with fluctuating dynamo governing parameters Pipin, V. V., Sokoloff, D. D. & Usoskin, I. G., 2012, A&A, 542, A26
46	Cosmogenic 7Be in air: A complex mixture of production and transport Leppänen, A.-P., Pacini, A. A., Usoskin, I. G., Aldahan, A., Echer, E., Evangelista, H., Klemola, S., Kovaltsov, G. A., Mursula, K. & Possnert, G., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 1036
46	Nitrate in Polar Ice: A New Tracer of Solar Variability Traversi, R., Usoskin, I. G., Solanki, S. K., Becagli, S., Frezzotti, M., Severi, M., Stenni, B. & Udisti, R., 2012, Solar Physics, 280, 237
46	Analysis of Ground Level Enhancements (GLE): Extreme solar energetic particle events have hard spectra Asvestari, E., Willamo, T., Gil, A., Usoskin, I. G., Kovaltsov, G. A., Mikhailov, V. V. & Mayorov, A., 2017, Advances in Space Research, 60, 781
45	In Situ Data and Effect Correlation During September 2017 Solar Particle Event Jiggens, P., Clavie, C., Evans, H., O'Brien, T. P., Witasse, O., Mishev, A. L., Nieminen, P., Daly, E., Kalegaev, V., Vlasova, N., Borisov, S., Benck, S., Poivey, C., Cyamukungu, M., Mazur, J., Heynderickx, D., Sandberg, I., Berger, T., Usoskin, I. G., Paassilta, M., Vainio, R., Straube, U., Müller, D., Sánchez-Cano, B., Hassler, D., Praks, J., Niemelä, P., Leppinen, H., Punkkinen, A., Aminalragia-Giamini, S. & Nagatsuma, T., 2019, Space Weather, 17, 99
45	Cosmic rays and climate of the Earth: Possible connection Usoskin, Ilya G. & Kovaltsov, Gennady A., 2008, Comptes Rendus Geoscience, 340, 441
45	Validation of the Neutron Monitor Yield Function Using Data From AMS-02 Experiment, 2011-2017 Koldobskiy, Sergey A., Bindi, Veronica, Corti, Claudio, Kovaltsov, Gennady A. & Usoskin, Ilya G., 2019, Journal of Geophysical Research (Space Physics), 124, 2367
44	Stochastic simulation of cosmic ray modulation including a wavy heliospheric current sheet Alanko-Huotari, K., Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2007, Journal of Geophysical Research (Space Physics), 112, A08101
44	Revisited Reference Solar Proton Event of 23 February 1956: Assessment of the Cosmogenic-Isotope Method Sensitivity to Extreme Solar Events Usoskin, Ilya G., Koldobskiy, Sergey A., Kovaltsov, Gennady A., Rozanov, Eugene V., Sukhodolov, Timofei V., Mishev, Alexander L. & Mironova, Irina A., 2020, Journal of Geophysical Research (Space Physics), 125, e27921
44	Solar activity, cosmic rays, and Earth's temperature: A millennium-scale comparison Usoskin, I. G., Schüssler, M., Solanki, S. K. & Mursula, K., 2005, Journal of Geophysical Research (Space Physics), 110, A10102
43	Correlation between clouds at different altitudes and solar activity: Fact or Artifact? Usoskin, I. G., Voiculescu, M., Kovaltsov, G. A. & Mursula, K., 2006, Journal of Atmospheric and Solar-Terrestrial Physics, 68, 2164
43	On the Dimension of Solar Attractor Ostriakov, V. M. & Usoskin, I. G., 1990, Solar Physics, 127, 405
43	Forbush decreases of cosmic rays: Energy dependence of the recovery phase Usoskin, I. G., Braun, I., Gladysheva, O. G., HöRandel, J. R., JäMséN, T., Kovaltsov, G. A. & Starodubtsev, S. A., 2008, Journal of Geophysical Research (Space Physics), 113, A07102
43	Heliospheric modulation strength during the neutron monitor era Usoskin, I. G., Alanko, K., Mursula, K. & Kovaltsov, G. A., 2002, Solar Physics, 207, 389
42	Assessment of spectral and angular characteristics of sub-GLE events using the global neutron monitor network Mishev, Alexander, Poluianov, Stepan & Usoskin, Ilya, 2017, Journal of Space Weather and Space Climate, 7, A28
42	Long-term persistence of solar active longitudes and its implications for the solar dynamo theory Usoskin, I. G., Berdyugina, S. V., Moss, D. & Sokoloff, D. D., 2007, Advances in Space Research, 40, 951
42	Role of centennial geomagnetic changes in local atmospheric ionization Usoskin, I. G., Korte, M. & Kovaltsov, G. A., 2008, Geophysical Research Letters, 35, L05811
41	On the common solar signal in different cosmogenic isotope data sets Usoskin, Ilya G., Horiuchi, Kazuho, Solanki, Sami, Kovaltsov, Gennady A. & Bard, Edouard, 2009, Journal of Geophysical Research (Space Physics), 114, A03112
40	Electromagnetic and corpuscular emission from the solar flare of 1991 June 15: Continuous acceleraton of relativistic particles Kocharov, L. G., Kovaltsov, G. A., Kocharov, G. E., Chuikin, E. I., Usoskin, I. G., Shea, M. A., Smart, D. F., Melnikov, V. F., Podstrigach, T. S., Armstrong, T. P. & Zirin, H., 1994, Solar Physics, 150, 267
40	Analysis of the Ground-Level Enhancements on 14 July 2000 and 13 December 2006 Using Neutron Monitor Data Mishev, A. & Usoskin, I., 2016, Solar Physics, 291, 1225
39	New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events Koldobskiy, S., Raukunen, O., Vainio, R., Kovaltsov, G. A. & Usoskin, I., 2021, A&A, 647, A132
39	On possible drivers of Sun-induced climate changes de Jager, Cornelis & Usoskin, Ilya, 2006, Journal of Atmospheric and Solar-Terrestrial Physics, 68, 2053
39	Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE Brehm, Nicolas, Christl, Marcus, Knowles, Timothy D. J., Casanova, Emmanuelle, Evershed, Richard P., Adolphi, Florian, Muscheler, Raimund, Synal, Hans-Arno, Mekhaldi, Florian, Paleari, Chiara I., Leuschner, Hanns-Hubert, Bayliss, Alex, Nicolussi, Kurt, Pichler, Thomas, Schlüchter, Christian, Pearson, Charlotte L., Salzer, Matthew W., Fonti, Patrick, Nievergelt, Daniel, Hantemirov, Rashit, Brown, David M., Usoskin, Ilya & Wacker, Lukas, 2022, Nature Communications, 13, 1196
38	Long-term variation in the Sun's activity caused by magnetic Rossby waves in the tachocline Zaqarashvili, Teimuraz V., Oliver, Ramon, Hanslmeier, Arnold, Carbonell, Marc, Ballester, Jose Luis, Gachechiladze, Tamar & Usoskin, Ilya G., 2015, ApJ, 805, L14
38	Reconstruction of Monthly and Yearly Group Sunspot Numbers From Sparse Daily Observations Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, Solar Physics, 218, 295
37	Long-Term Solar Activity: Direct and Indirect Study Usoskin, I. G. & Kovaltsov, G. A., 2004, Solar Physics, 224, 37
37	Solar Cycle in the Heliosphere and Cosmic Rays Bazilevskaya, Galina A., Cliver, Edward W., Kovaltsov, Gennady A., Ling, Alan G., Shea, M. A., Smart, D. F. & Usoskin, Ilya G., 2014, Space Science Reviews, 186, 409
36	Solar modulation in surface atmospheric electricity Giles Harrison, R. & Usoskin, Ilya, 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 176
36	Fluence Ordering of Solar Energetic Proton Events Using Cosmogenic Radionuclide Data Kovaltsov, G. A., Usoskin, I. G., Cliver, E. W., Dietrich, W. F. & Tylka, A. J., 2014, Solar Physics, 289, 4691
36	Can we properly model the neutron monitor count rate? Gil, Agnieszka, Usoskin, Ilya G., Kovaltsov, Gennady A., Mishev, Alexander L., Corti, Claudio & Bindi, Veronica, 2015, Journal of Geophysical Research (Space Physics), 120, 7172
36	The Alpha Magnetic Spectrometer (AMS) Alcaraz, J., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., Baldini, L., Basile, M., Barancourt, D., Barao, F., Barbier, G., Barreira, G., Battiston, R., Becker, R., Becker, U., Bellagamba, L., Bene, P., Berdugo, J., Berges, P., Bertucci, B., Biland, A., Bizzaglia, S., Blasko, S., Boella, G., Boschini, M., Bourquin, M., Brocco, L., Bruni, G., Buenerd, M., Burger, J. D., Burger, W. J., Cai, X. D., Camps, C., Cannarsa, P., Capell, M., Casadei, D., Casaus, J., Castellini, G., Cecchi, C., Chang, Y. H., Chen, H. F., Chen, H. S., Chen, Z. G., Chernoplekov, N. A., Chiueh, T. H., Chuang, Y. L., Cindolo, F., Commichau, V., Contin, A., Crespo, P., Cristinziani, M., da Cunha, J. P., Dai, T. S., Deus, J. D., Dinu, N., Djambazov, L., DAntone, I., Dong, Z. R., Emonet, P., Engelberg, J., Eppling, F. J., Eronen, T., Esposito, G., Extermann, P., Favier, J., Fiandrini, E., Fisher, P. H., Fluegge, G., Fouque, N., Galaktionov, Yu., Gervasi, M., Giusti, P., Grandi, D., Grimm, O., Gu, W. Q., Hangarter, K., Hasan, A., Hermel, V., Hofer, H., Huang, M. A., Hungerford, W., Ionica, M., Ionica, R., Jongmanns, M., Karlamaa, K., Karpinski, W., Kenney, G., Kenny, J., Kim, W., Klimentov, A., Kossakowski, R., Koutsenko, V., Kraeber, M., Laborie, G., Laitinen, T., Lamanna, G., Laurenti, G., Lebedev, A., Lee, S. C., Levi, G., Levtchenko, P., Liu, C. L., Liu, H. T., Lopes, I., Lu, G., Lu, Y. S., Lübelsmeyer, K., Luckey, D., Lustermann, W., Maña, C., Margotti, A., Mayet, F., McNeil, R. R., Meillon, B., Menichelli, M., Mihul, A., Mourao, A., Mujunen, A., Palmonari, F., Papi, A., Park, I. H., Pauluzzi, M., Pauss, F., Perrin, E., Pesci, A., Pevsner, A., Pimenta, M., Plyaskin, V., Pojidaev, V., Postolache, V., Produit, N., Rancoita, P. G., Rapin, D., Raupach, F., Ren, D., Ren, Z., Ribordy, M., Richeux, J. P., Riihonen, E., Ritakari, J., Roeser, U., Roissin, C., Sagdeev, R., Sartorelli, G., Schultz von Dratzig, A., Schwering, G., Scolieri, G., Seo, E. S., Shoutko, V., Shoumilov, E., Siedling, R., Son, D., Song, T., Steuer, M., Sun, G. S., Suter, H., Tang, X. W., Ting, Samuel C. C., Ting, S. M., Tornikoski, M., Torsti, J., Tr umper, J., Ulbricht, J., Urpo, S., Usoskin, I., Valtonen, E., Vandenhirtz, J., Velcea, F., Velikhov, E., Verlaat, B., Vetlitsky, I., Vezzu, F., Vialle, J. P., Viertel, G., Vite, D., Von Gunten, H., Wicki, S. Waldmeier, Wallraff, W., Wang, B. C., Wang, J. Z., Wang, Y. H., Wiik, K., Williams, C., Wu, S. X., Xia, P. C., Yan, J. L., Yan, L. G., Yang, C. G., Yang, M., Ye, S. W., Yeh, P., Xu, Z. Z., Zhang, H. Y., Zhang, Z. P., Zhao, D. X., Zhu, G. Y., Zhu, W. Z., Zhuang, H. L., Zichichi, A. & Zimmermann, B., 2002, Nuclear Instruments and Methods in Physics Research A, 478, 119
35	Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions Kocharov, Leon, Pohjolainen, Silja, Mishev, Alexander, Reiner, Mike J., Lee, Jeongwoo, Laitinen, Timo, Didkovsky, Leonid V., Pizzo, Victor J., Kim, Roksoon, Klassen, Andreas, Karlicky, Marian, Cho, Kyung-Suk, Gary, Dale E., Usoskin, Ilya, Valtonen, Eino & Vainio, Rami, 2017, ApJ, 839, 79
35	Updated sunspot group number reconstruction for 1749-1996 using the active day fraction method Willamo, T., Usoskin, I. G. & Kovaltsov, G. A., 2017, A&A, 601, A109
35	Global Heliospheric Parameters and Cosmic-Ray Modulation: An Empirical Relation for the Last Decades Alanko-Huotari, K., Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2006, Solar Physics, 238, 391
35	Cosmogenic 7Be and 22Na in Finland: Production, observed periodicities and the connection to climatic phenomena Leppänen, A.-P., Usoskin, I. G., Kovaltsov, G. A. & Paatero, J., 2012, Journal of Atmospheric and Solar-Terrestrial Physics, 74, 164
35	Case study of Forbush decreases: Energy dependence of the recovery Jämsén, T., Usoskin, I. G., Räihä, T., Sarkamo, J. & Kovaltsov, G. A., 2007, Advances in Space Research, 40, 342
35	Dependence of cosmic rays on solar activity for odd and even solar cycles Usoskin, I. G., Mursula, K., Kananen, H. & Kovaltsov, G. A., 2001, Advances in Space Research, 27, 571
35	Inconsistency of the Wolf sunspot number series around 1848 Leussu, Raisa, Usoskin, Ilya G., Arlt, Rainer & Mursula, Kalevi, 2013, A&A, 559, A28
34	Short-term production and synoptic influences on atmospheric 7Be concentrations Usoskin, Ilya G., Field, Christy V., Schmidt, Gavin A., LeppäNen, Ari-Pekka, Aldahan, Ala, Kovaltsov, Gennady A., Possnert, GöRan & Ungar, R. Kurt, 2009, Journal of Geophysical Research (Atmospheres), 114, D06108
34	An Assessment of Sunspot Number Data Composites over 1845-2014 Lockwood, M., Owens, M. J., Barnard, L. & Usoskin, I. G., 2016, ApJ, 824, 54
34	The lost sunspot cycle: Reanalysis of sunspot statistics Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, A&A, 403, 743
34	An Upper Limit on Sunspot Activity During the Maunder Minimum Kovaltsov, G. A., Usoskin, I. G. & Mursula, K., 2004, Solar Physics, 224, 95
34	Assessment of the Radiation Environment at Commercial Jet-Flight Altitudes During GLE 72 on 10 September 2017 Using Neutron Monitor Data Mishev, A. L. & Usoskin, I. G., 2018, Space Weather, 16, 1921
33	Possible effect of extreme solar energetic particle event of 20 January 2005 on polar stratospheric aerosols: direct observational evidence Mironova, I. A., Usoskin, I. G., Kovaltsov, G. A. & Petelina, S. V., 2012, Atmospheric Chemistry & Physics, 12, 769
33	Lost sunspot cycle in the beginning of Dalton minimum: New evidence and consequences Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2002, Geophysical Research Letters, 29, 2183
32	Neutron Monitors and Cosmogenic Isotopes as Cosmic Ray Energy-Integration Detectors: Effective Yield Functions, Effective Energy, and Its Dependence on the Local Interstellar Spectrum Asvestari, Eleanna, Gil, Agnieszka, Kovaltsov, Gennady A. & Usoskin, Ilya G., 2017, Journal of Geophysical Research (Space Physics), 122, 9790
32	Tests of Sunspot Number Sequences: 3. Effects of Regression Procedures on the Calibration of Historic Sunspot Data Lockwood, M., Owens, M. J., Barnard, L. & Usoskin, I. G., 2016, Solar Physics, 291, 2829
32	Numerical model for computation of effective and ambient dose equivalent at flight altitudes. Application for dose assessment during GLEs Mishev, Alexander & Usoskin, Ilya, 2015, Journal of Space Weather and Space Climate, 5, A10
31	Long-term solar activity reconstructions: direct test by cosmogenic 44Ti in meteorites Usoskin, I. G., Solanki, S. K., Taricco, C., Bhandari, N. & Kovaltsov, G. A., 2006, A&A, 457, L25
31	Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions Owens, M. J., Cliver, E., McCracken, K. G., Beer, J., Barnard, L., Lockwood, M., Rouillard, A., Passos, D., Riley, P., Usoskin, I. & Wang, Y.-M., 2016, Journal of Geophysical Research (Space Physics), 121, 6048
30	Critical Analysis of a Hypothesis of the Planetary Tidal Influence on Solar Activity Poluianov, S. & Usoskin, I., 2014, Solar Physics, 289, 2333
29	Seven Decades of Neutron Monitors (1951-2019): Overview and Evaluation of Data Sources Väisänen, Pauli, Usoskin, Ilya & Mursula, Kalevi, 2021, Journal of Geophysical Research (Space Physics), 126, e28941
29	Release timescales of solar energetic particles in the low corona Agueda, N., Klein, K.-L., Vilmer, N., Rodríguez-Gasén, R., Malandraki, O. E., Papaioannou, A., Subirà, M., Sanahuja, B., Valtonen, E., Dröge, W., Nindos, A., Heber, B., Braune, S., Usoskin, I. G., Heynderickx, D., Talew, E. & Vainio, R., 2014, A&A, 570, A5
28	Solar energetic particles and galactic cosmic rays over millions of years as inferred from data on cosmogenic 26Al in lunar samples Poluianov, S., Kovaltsov, G. A. & Usoskin, I. G., 2018, A&A, 618, A96
28	Computation of dose rate at flight altitudes during ground level enhancements no. 69, 70 and 71 Mishev, A. L., Adibpour, F., Usoskin, I. G. & Felsberger, E., 2015, Advances in Space Research, 55, 354
27	Occurrence Probability of Large Solar Energetic Particle Events: Assessment from Data on Cosmogenic Radionuclides in Lunar Rocks Kovaltsov, G. A. & Usoskin, I. G., 2014, Solar Physics, 289, 211
27	Assessment of different sunspot number series using the cosmogenic isotope 44Ti in meteorites Asvestari, Eleanna, Usoskin, Ilya G., Kovaltsov, Gennady A., Owens, Mathew J., Krivova, Natalie A., Rubinetti, Sara & Taricco, Carla, 2017, MNRAS, 467, 1608
27	Heliospheric modulation strength: effective neutron monitor energy Alanko, K., Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, Advances in Space Research, 32, 615
27	Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated Active-Day Fraction (ADF) Sunspot Group Series Usoskin, Ilya, Kovaltsov, Gennady & Kiviaho, Wilma, 2021, Solar Physics, 296, 13
26	Influence of a Carrington-like event on the atmospheric chemistry, temperature and dynamics: revised Calisto, M., Usoskin, I. & Rozanov, E., 2013, Environmental Research Letters, 8, 045010
26	Regional millennial trend in the cosmic ray induced ionization of the troposphere Usoskin, I. G., Mironova, I. A., Korte, M. & Kovaltsov, G. A., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 19
25	Clouds blown by the solar wind Voiculescu, M., Usoskin, I. & Condurache-Bota, S., 2013, Environmental Research Letters, 8, 045032
25	Monte-Carlo approach to Galactic Cosmic Ray propagation in the Heliosphere Gervasi, M., Rancoita, P. G., Usoskin, I. G. & Kovaltsov, G. A., 1999, Nuclear Physics B Proceedings Supplements, 78, 26
25	Sun-like stars produce superflares roughly once per century Vasilyev, Valeriy, Reinhold, Timo, Shapiro, Alexander I., Usoskin, Ilya, Krivova, Natalie A., Maehara, Hiroyuki, Notsu, Yuta, Brun, Allan Sacha, Solanki, Sami K. & Gizon, Laurent, 2024, Science, 386, 1301
24	Mind the Gap: New Precise 14C Data Indicate the Nature of Extreme Solar Particle Events Usoskin, Ilya G. & Kovaltsov, Gennady A., 2021, Geophysical Research Letters, 48, e94848
24	Mini Neutron Monitors at Concordia Research Station, Central Antarctica Poluianov, Stepan, Usoskin, Ilya, Mishev, Alexander, Moraal, Harm, Kruger, Helena, Casasanta, Giampietro, Traversi, Rita & Udisti, Roberto, 2015, Journal of Astronomy and Space Sciences, 32, 281
23	Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers Usoskin, I. G., Kovaltsov, G. A. & Chatzistergos, T., 2016, Solar Physics, 291, 3793
23	Variations of aerosol optical properties during the extreme solar event in January 2005 Mironova, I. A., Desorgher, L., Usoskin, I. G., Flückiger, E. O. & Bütikofer, R., 2008, Geophysical Research Letters, 35, L18610
23	Persistent solar signatures in cloud cover: spatial and temporal analysis Voiculescu, M. & Usoskin, I., 2012, Environmental Research Letters, 7, 044004
23	A New Open-Source Geomagnetosphere Propagation Tool (OTSO) and Its Applications Larsen, Nicholas, Mishev, Alexander & Usoskin, Ilya, 2023, Journal of Geophysical Research (Space Physics), 128, e2022JA031061
23	Wings of the butterfly: Sunspot groups for 1826-2015 Leussu, R., Usoskin, I. G., Senthamizh Pavai, V., Diercke, A., Arlt, R., Denker, C. & Mursula, K., 2017, A&A, 599, A131
22	Cyclic variations of the heliospheric tilt angle and cosmic ray modulation Alanko-Huotari, K., Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2007, Advances in Space Research, 40, 1064
22	Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event Kocharov, Leon, Pesce-Rollins, Melissa, Laitinen, Timo, Mishev, Alexander, Kühl, Patrick, Klassen, Andreas, Jin, Meng, Omodei, Nicola, Longo, Francesco, Webb, David F., Cane, Hilary V., Heber, Bernd, Vainio, Rami & Usoskin, Ilya, 2020, ApJ, 890, 13
22	Natural Sources of Ionization and Their Impact on Atmospheric Electricity Golubenko, K., Rozanov, E., Mironova, I., Karagodin, A. & Usoskin, I., 2020, Geophysical Research Letters, 47, e88619
22	Force-field parameterization of the galactic cosmic ray spectrum: Validation for Forbush decreases Usoskin, I. G., Kovaltsov, G. A., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, P., Casolino, M., Castellini, G., De Donato, C., De Santis, C., De Simone, N., Di Felice, V., Formato, V., Galper, A. M., Karelin, A. V., Koldashov, S. V., Koldobskiy, S., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malakhov, V., Marcelli, L., Martucci, M., Mayorov, A. G., Menn, W., Mergé, M., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Munini, R., Osteria, G., Palma, F., Panico, B., Papini, P., Pearce, M., Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, L., Sarkar, R., Scotti, V., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N. & Zverev, V. G., 2015, Advances in Space Research, 55, 2940
22	Measurements of muon flux in the Pyhäsalmi underground laboratory Enqvist, T., Mattila, A., Föhr, V., Jämsén, T., Lehtola, M., Narkilahti, J., Joutsenvaara, J., Nurmenniemi, S., Peltoniemi, J., Remes, H., Sarkamo, J., Shen, C. & Usoskin, I., 2005, Nuclear Instruments and Methods in Physics Research A, 554, 286
22	Modelling the evolution of the Sun's open and total magnetic flux Krivova, N. A., Solanki, S. K., Hofer, B., Wu, C.-J., Usoskin, I. G. & Cameron, R., 2021, A&A, 650, A70
22	Consistent long-term variation in the hemispheric asymmetry of solar rotation Zhang, L., Mursula, K. & Usoskin, I., 2013, A&A, 552, A84
22	Coronal Mass Ejections and Ground Level Enhancements Gopalswamy, N., Xie, H., Yashiro, S. & Usoskin, I., 2005, 29th International Cosmic Ray Conference (ICRC29), Volume 1 (Editors: Acharya, B. Sripathi, Gupta, Sunil, Jagadeesan, P., Jain, Atul, Karthikeyan, S., Morris, Samuel & Tonwar, Suresh), International Cosmic Ray Conference, 1, p. 169
22	Solar Cycle Observations Norton, Aimee, Howe, Rachel, Upton, Lisa & Usoskin, Ilya, 2023, Space Science Reviews, 219, 64
22	Tests of Sunspot Number Sequences: 2. Using Geomagnetic and Auroral Data Lockwood, M., Owens, M. J., Barnard, L., Scott, C. J., Usoskin, I. G. & Nevanlinna, H., 2016, Solar Physics, 291, 2811
22	Near-Earth heliospheric magnetic field intensity since 1750: 2. Cosmogenic radionuclide reconstructions Owens, M. J., Cliver, E., McCracken, K. G., Beer, J., Barnard, L., Lockwood, M., Rouillard, A., Passos, D., Riley, P., Usoskin, I. & Wang, Y.-M., 2016, Journal of Geophysical Research (Space Physics), 121, 6064
22	Global analysis of active longitudes of sunspots Zhang, L., Mursula, K., Usoskin, I. & Wang, H., 2011, A&A, 529, A23
21	The World Neutron Monitor Network as a tool for the study of solar neutrons Usoskin, I. G., Kovaltsov, G. A., Kananen, H. & Tanskanen, P., 1997, Annales Geophysicae, 15, 375
21	Solar surface rotation: N-S asymmetry and recent speed-up Zhang, L., Mursula, K. & Usoskin, I., 2015, A&A, 575, L2
21	Reconstructing the long-term cosmic ray intensity: linear relations do not work Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2003, Annales Geophysicae, 21, 863
20	An Optical Atmospheric Phenomenon Observed in 1670 over the City of Astrakhan Was Not a Mid-Latitude Aurora Usoskin, I. G., Kovaltsov, G. A., Mishina, L. N., Sokoloff, D. D. & Vaquero, J., 2017, Solar Physics, 292, 15
20	Multiple Sources of Solar High-energy Protons Kocharov, Leon, Omodei, Nicola, Mishev, Alexander, Pesce-Rollins, Melissa, Longo, Francesco, Yu, Sijie, Gary, Dale E., Vainio, Rami & Usoskin, Ilya, 2021, ApJ, 915, 12
20	On the Claimed 5.5-year Periodicity in Solar Activity Mursula, K., Usoskin, I. & Zieger, B., 1997, Solar Physics, 176, 201
20	Modulated antiproton fluxes for interstellar production models Boella, G., Gervasi, M., Potenza, M. A. C., Rancoita, P. G. & Usoskin, I., 1998, Astroparticle Physics, 9, 261
20	Extreme Value Theory Applied to the Millennial Sunspot Number Series Acero, F. J., Gallego, M. C., García, J. A., Usoskin, I. G. & Vaquero, J. M., 2018, ApJ, 853, 80
20	Multiproxy Reconstructions of Integral Energy Spectra for Extreme Solar Particle Events of 7176 BCE, 660 BCE, 775 CE, and 994 CE Koldobskiy, Sergey, Mekhaldi, Florian, Kovaltsov, Gennady & Usoskin, Ilya, 2023, Journal of Geophysical Research (Space Physics), 128, e2022JA031186
20	Can Superflares Occur on the Sun? A View from Dynamo Theory Katsova, M. M., Kitchatinov, L. L., Livshits, M. A., Moss, D. L., Sokoloff, D. D. & Usoskin, I. G., 2018, Astronomy Reports, 62, 72
20	New Method of Assessment of the Integral Fluence of Solar Energetic (> 1 GV Rigidity) Particles from Neutron Monitor Data Koldobskiy, Sergey A., Kovaltsov, Gennady A., Mishev, Alexander L. & Usoskin, Ilya G., 2019, Solar Physics, 294, 94
20	A Joint Analysis of High-Energy Neutrons and Neutron-Decay Protons from a Flare Kocharov, L. G., Torsti, J., Vainio, R., Kovaltsov, G. A. & Usoskin, I. G., 1996, Solar Physics, 169, 181
19	Spectral characteristic of mid-term quasi-periodicities in sunspot data Frick, P., Sokoloff, D., Stepanov, R., Pipin, V. & Usoskin, I., 2020, MNRAS, 491, 5572
19	Introduction to Space Climate Mursula, K., Usoskin, I. G. & Maris, G., 2007, Advances in Space Research, 40, 885
19	Possible effect of strong solar energetic particle events on polar stratospheric aerosol: a summary of observational results Mironova, I. A. & Usoskin, I. G., 2014, Environmental Research Letters, 9, 015002
19	Effect of ENSO and volcanic events on the Sun cloud link Voiculescu, Mirela, Usoskin, Ilya & Mursula, Kalevi, 2007, Advances in Space Research, 40, 1140
18	Evidence for charge drift modulation at intermediate solar activity from the flux variation of protons and α particles Boella, G., Gervasi, M., Mariani, S., Rancoita, P. G. & Usoskin, I. G., 2001, Journal of Geophysical Research, 106, 29355
18	Possible effect of extreme solar energetic particle events of September-October 1989 on polar stratospheric aerosols: a case study Mironova, I. A. & Usoskin, I. G., 2013, Atmospheric Chemistry & Physics, 13, 8543
17	Climate: How unusual is today's solar activity? (reply) Solanki, S. K., Usoskin, I. G., Kromer, B., Schüssler, M. & Beer, J., 2005, Nature, 436, 4
17	Cosmogenic Isotope Variability During the Maunder Minimum: Normal 11-year Cycles Are Expected Poluianov, S. V., Usoskin, I. G. & Kovaltsov, G. A., 2014, Solar Physics, 289, 4701
17	Regional cosmic ray induced ionization and geomagnetic field changes Kovaltsov, G. A. & Usoskin, I. G., 2007, Advances in Geosciences, 13, 31
16	Long-term forcing of the Sun's coronal field, open flux, and cosmic ray modulation potential during grand minima, maxima, and regular activity phases by the solar dynamo mechanism Dash, Soumyaranjan, Nandy, Dibyendu & Usoskin, Ilya, 2023, MNRAS, 525, 4801
16	An empirical model of heliospheric cosmic ray modulation on long-term time scale Asvestari, Eleanna & Usoskin, Ilya G., 2016, Journal of Space Weather and Space Climate, 6, A15
16	Zonal Mean Distribution of Cosmogenic Isotope (7Be, 10Be, 14C, and 36Cl) Production in Stratosphere and Troposphere Golubenko, K., Rozanov, E., Kovaltsov, G. & Usoskin, I., 2022, Journal of Geophysical Research (Atmospheres), 127, e2022JD036726
16	The carbon-14 spike in the 8th century was not caused by a cometary impact on Earth Usoskin, Ilya G. & Kovaltsov, Gennady A., 2015, Icarus, 260, 475
15	Effective Rigidity of a Polar Neutron Monitor for Recording Ground-Level Enhancements Koldobskiy, Sergey A., Kovaltsov, Gennady A. & Usoskin, Ilya G., 2018, Solar Physics, 293, 110
15	An Unusual Pattern of Cosmic-Ray Modulation During Solar Cycles 23 and 24 Pacini, A. A. & Usoskin, I. G., 2015, Solar Physics, 290, 943
15	Properties of sunspot cycles and hemispheric wings since the 19th century Leussu, Raisa, Usoskin, Ilya G., Arlt, Rainer & Mursula, Kalevi, 2016, A&A, 592, A160
15	Atmospheric ionization induced by precipitating electrons: Comparison of CRAC:EPII model with a parametrization model Artamonov, A. A., Mishev, A. L. & Usoskin, I. G., 2016, Journal of Atmospheric and Solar-Terrestrial Physics, 149, 161
15	An Anisotropic Cosmic-Ray Enhancement Event on 07-June-2015: A Possible Origin Gil, Agnieszka, Kovaltsov, Gennady A., Mikhailov, Vladimir V., Mishev, Alexander, Poluianov, Stepan & Usoskin, Ilya G., 2018, Solar Physics, 293, 154
14	Revised Reconstruction of the Heliospheric Modulation Potential for 1964-2022 Väisänen, Pauli, Usoskin, Ilya, Kähkönen, Riikka, Koldobskiy, Sergey & Mursula, Kalevi, 2023, Journal of Geophysical Research (Space Physics), 128, e2023JA031352
14	Signature of a sudden stratospheric warming in the near-ground 7Be flux Pacini, A. A., Usoskin, I. G., Mursula, K., Echer, E. & Evangelista, H., 2015, Atmospheric Environment, 113, 27
14	Global analysis of active longitudes of solar X-ray flares Zhang, L., Mursula, K., Usoskin, I. & Wang, H., 2011, Journal of Atmospheric and Solar-Terrestrial Physics, 73, 258
13	Spatial Organization of Seven Extreme Solar Energetic Particle Events Kocharov, Leon, Pohjolainen, Silja, Reiner, Mike J., Mishev, Alexander, Wang, Haimin, Usoskin, Ilya & Vainio, Rami, 2018, ApJ, 862, L20
13	Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications Artamonov, A. A., Mishev, A. L. & Usoskin, I. G., 2016, Journal of Geophysical Research (Space Physics), 121, 1736
12	Upgrade of GLE database: Assessment of effective dose rate at flight altitude Tuohino, S., Ibragimov, A., Usoskin, I. & Mishev, A., 2018, Advances in Space Research, 62, 398
12	Grand minima of solar activity during the last millennia Usoskin, Ilya G., Solanki, Sami K. & Kovaltsov, Gennady A., 2012, Comparative Magnetic Minima: Characterizing Quiet Times in the Sun and Stars (Editors: Mandrini, Cristina H. & Webb, David F.), IAU Symposium, 286, p. 372
11	Application of CCM SOCOL-AERv2-BE to cosmogenic beryllium isotopes: description and validation for polar regions Golubenko, Kseniia, Rozanov, Eugene, Kovaltsov, Gennady, Leppänen, Ari-Pekka, Sukhodolov, Timofei & Usoskin, Ilya, 2021, Geoscientific Model Development, 14, 7605
11	Effective Energy of Cosmogenic Isotope (10Be, 14C and 36Cl) Production by Solar Energetic Particles and Galactic Cosmic Rays Koldobskiy, Sergey, Usoskin, Ilya & Kovaltsov, Gennady A., 2022, Journal of Geophysical Research (Space Physics), 127, e29919
11	The impact of geomagnetic spikes on the production rates of cosmogenic 14C and 10Be in the Earth's atmosphere Fournier, Alexandre, Gallet, Yves, Usoskin, Ilya, Livermore, Philip W. & Kovaltsov, Gennady A., 2015, Geophysical Research Letters, 42, 2759
11	Sunspot cycles and Grand Minima Sokoloff, Dmitry, Arlt, Rainer, Moss, David, Saar, Steven H. & Usoskin, Ilya, 2010, Solar and Stellar Variability: Impact on Earth and Planets (Editors: Kosovichev, Alexander G., Andrei, Alexandre H. & Rozelot, Jean-Pierre), IAU Symposium, 264, p. 111
11	Towards The Definition Of A Solar Forcing Dataset For Cmip7 Funke, Bernd, Dudok de Wit, Thierry, Ermolli, Ilaria, Haberreiter, Margit, Kinnison, Doug, Marsh, Daniel, Nesse, Hilde, Seppälä, Annika, Sinnhuber, Miriam & Usoskin, Ilya, 2024, Geoscientific Model Development, 17, 1217
11	Long-Term and Solar Cycle Variation of Galactic Cosmic Rays: Evidence for Variable Heliospheric Turbulence Väisänen, Pauli, Usoskin, Ilya & Mursula, Kalevi, 2019, Journal of Geophysical Research (Space Physics), 124, 804
10	The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core Traversi, R., Becagli, S., Poluianov, S., Severi, M., Solanki, S. K., Usoskin, I. G. & Udisti, R., 2016, Scientific Reports, 6, 20235
10	A New Full 3-D Model of Cosmogenic Tritium 3H Production in the Atmosphere (CRAC:3H) Poluianov, S. V., Kovaltsov, G. A. & Usoskin, I. G., 2020, Journal of Geophysical Research (Atmospheres), 125, e2020JD033147
10	Does sunspot number calibration by the “magnetic needle” make sense? Mursula, K., Usoskin, I. & Yakovchouk, O., 2009, Journal of Atmospheric and Solar-Terrestrial Physics, 71, 1717
10	Has the Earth been exposed to numerous supernovae within the last 300 kyr? Melott, Adrian L., Usoskin, Ilya G., Kovaltsov, Gennady A. & Laird, Claude M., 2015, International Journal of Astrobiology, 14, 375
10	Rapid Cosmic Ray Fluctuations: Evidence for Cyclic Behaviour Starodubtsev, S. A., Usoskin, I. G. & Mursula, K., 2004, Solar Physics, 224, 335
10	The 1991 March 22 Flare: Possible Anisotropy of High-Energy Neutral Emission Kocharov, L. G., Lee, Jeongwoo W., Wang, H., Zirin, H., Kovaltsov, G. A. & Usoskin, I. G., 1995, Solar Physics, 158, 95
10	Neutron monitor count rate increase as a proxy for dose rate assessment at aviation altitudes during GLEs Mishev, Alexander, Tuohino, Sasu & Usoskin, Ilya, 2018, Journal of Space Weather and Space Climate, 8, A46
9	A Solar Cycle of Cosmic Ray Fluxes for 2006-2014: Comparison between PAMELA and Neutron Monitors Koldobskiy, Sergey A., Kovaltsov, Gennady A. & Usoskin, Ilya G., 2018, Journal of Geophysical Research (Space Physics), 123, 4479
9	A Test of the Active-Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity Willamo, T., Usoskin, I. G. & Kovaltsov, G. A., 2018, Solar Physics, 293, 69
9	Simulation of Sunspot Activity During Active Sun and Great Minima Using Regular, Random and Relic Fields Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, Solar Physics, 199, 187
9	A Comparative Study of Ground-level Enhancement Events of Solar Energetic Particles Kocharov, Leon, Mishev, Alexander, Riihonen, Esa, Vainio, Rami & Usoskin, Ilya, 2023, ApJ, 958, 122
9	Phase Evolution of Solar Activity and Cosmic-Ray Variation Cycles Usoskin, I. G., Kovaltsov, G. A., Kananen, H., Mursula, K. & Tanskanen, P. J., 1997, Solar Physics, 170, 447
9	The High-Energy Protons of the Ground Level Enhancement (GLE74) Event on 11 May 2024 Papaioannou, A., Mishev, A., Usoskin, I., Heber, B., Vainio, R., Larsen, N., Jarry, M., Rouillard, A. P., Talebpour Sheshvan, N., Laurenza, M., Dumbović, M., Vasalos, G., Gieseler, J., Koldobskiy, S., Raukunen, O., Palmroos, C., Hörlöck, M., Köberle, M., Wimmer-Schweingruber, R. F., Anastasiadis, A., Kühl, P. & Lavasa, E., 2025, Solar Physics, 300, 73
9	Cosmogenic isotope 7Be: A case study of depositional processes in Rio de Janeiro in 2008-2009 Pacini, A. A., Usoskin, I. G., Evangelista, H., Echer, E. & de Paula, R., 2011, Advances in Space Research, 48, 811
8	Computations of cosmic ray propagation in the Earth's atmosphere, towards a GLE analysis Mishev, A. & Usoskin, I., 2013, Journal of Physics Conference Series, Journal of Physics Conference Series, 409, p. 012152
8	The 1990 May 24 solar flare and cosmic ray event Kocharov, Leon, Kovaltsov, Gennadi, Torsti, Jarmo, Usoskin, Ilya, Zirin, Harold, Anttila, Antti & Vainio, Rami, 1996, High energy solar Physics (Editors: Ramaty, Reuven, Mandzhavidze, Natalie & Hua, Xin-Min), American Institute of Physics Conference Series, 374, p. 246
8	Long-Term Modulation of the Galactic Cosmic-Ray Fluctuation Spectrum Starodubtsev, S. A. & Usoskin, I. G., 2003, Astronomy Letters, 29, 594
8	Cosmic rays and climate forcing . Usoskin, I. G., 2011, Memorie della Societa Astronomica Italiana, 82, 937
8	The Solar Cycle at the Maunder Minimum Epoch Miyahara, Hiroko, Sokoloff, Dmitry & Usoskin, Ilya G., 2006, Advances in Geosciences, Volume 2: Solar Terrestrial (ST) (Editors: Duldig, Marc), 2, p. 1
8	Comment on the paper by Popova et al. "On a role of quadruple component of magnetic field in defining solar activity in grand cycles" Usoskin, Ilya G., 2018, Journal of Atmospheric and Solar-Terrestrial Physics, 176, 69
7	Cosmic Ray Induced Ion Production in the Atmosphere Bazilevskaya, G. A., Usoskin, I. G., Flückiger, E. O., Harrison, R. G., Desorgher, L., Bütikofer, R., Krainev, M. B., Makhmutov, V. S., Stozhkov, Y. I., Svirzhevskaya, A. K., Svirzhevsky, N. S. & Kovaltsov, G. A., 2008, Planetary Atmospheric Electricity (Editors: Leblanc, F., Aplin, K. L., Yair, Y., Harrison, R. G., Lebreton, J. P. & Blanc, M.), p.149
7	Spectra and Anisotropy of Solar Energetic Protons During GLE #65 on 28 October, 2003 and GLE #66 on 29 October, 2003 Mishev, Alexander L., Koldobskiy, Sergey A., Larsen, Nicholas & Usoskin, Ilya G., 2024, Solar Physics, 299, 24
7	Extreme solar storms and the quest for exact dating with radiocarbon Heaton, T. J., Bard, E., Bayliss, A., Blaauw, M., Bronk Ramsey, C., Reimer, P. J., Turney, C. S. M. & Usoskin, I., 2024, Nature, 633, 306
7	(1) Preferred longitudes in sunspot activity (2) Preferred sunspot longitudes: non-axisymmetry and differential rotation Usoskin, I. G., Berdyugina, S. V. & Poutanen, J., 2007, A&A, 464, 761
7	Transient Offset in 14C After the Carrington Event Recorded by Polar Tree Rings Uusitalo, Joonas, Golubenko, Kseniia, Arppe, Laura, Brehm, Nicolas, Hackman, Thomas, Hayakawa, Hisashi, Helama, Samuli, Mizohata, Kenichiro, Miyake, Fusa, Mäkinen, Harri, Nöjd, Pekka, Tanskanen, Eija, Tokanai, Fuyuki, Rozanov, Eugene, Wacker, Lukas, Usoskin, Ilya & Oinonen, Markku, 2024, Geophysical Research Letters, 51, e2023GL106632
7	Comparative Morphology of Solar Relativistic Particle Events Kocharov, Leon, Klassen, Andreas, Valtonen, Eino, Usoskin, Ilya & Ryan, James M., 2015, ApJ, 811, L9
7	Solar flare neutrinos. Kocharov, G. E., Koval'Tsov, G. A. & Usoskin, I. G., 1991, Nuovo Cimento C Geophysics Space Physics C, 14, 417
7	Database of Ground Level Enhancements (GLE) of High Energy Solar Proton Events Usoskin, I., Ibragimov, A., Shea, M. A. & Smart, D. F., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 54
7	Effects of Global Geomagnetic Field Variations Over the Past 100,000 Years on Cosmogenic Radionuclide Production Rates in the Earth's Atmosphere Panovska, Sanja, Poluianov, Stepan, Gao, Jiawei, Korte, Monika, Mishev, Alexander, Shprits, Yuri Y. & Usoskin, Ilya, 2023, Journal of Geophysical Research (Space Physics), 128, e2022JA031158
6	Balloon measurements of the vertical ionization profile over southern Israel and comparison to mid-latitude observations Yaniv, Roy, Yair, Yoav, Price, Colin, Nicoll, Keri, Harrison, Giles, Artamonov, Anton & Usoskin, Ilya, 2016, Journal of Atmospheric and Solar-Terrestrial Physics, 149, 87
6	Sunspot cycles for the first millennium BC reconstructed from radiocarbon Usoskin, I., Chatzistergos, T., Solanki, S. K., Krivova, N., Kovaltsov, G., Brehm, N., Christl, M. & Wacker, L., 2025, A&A, 698, A182
6	A 22-year cycle in sunspot activity Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2002, Advances in Space Research, 29, 1979
6	Historical astronomical data: urgent need for preservation, digitization enabling scientific exploration Pevtsov, Alexei, Griffin, Elizabeth, Grindlay, Jonathan, Kafka, Stella, Bartlett, Jennifer, Usoskin, Ilya, Mursula, Kalevi, Gibson, Sarah, Pillet, Valentín, Burkepile, Joan, Webb, David, Clette, Frédéric, Hesser, James, Stetson, Peter, Muñoz-Jaramillo, Andres, Hill, Frank, Bogart, Rick, Osborn, Wayne & Longcope, Dana, 2019, Bulletin of the American Astronomical Society, 51, 190
6	Radiocarbon monoxide indicates increasing atmospheric oxidizing capacity Morgenstern, Olaf, Moss, Rowena, Manning, Martin, Zeng, Guang, Schaefer, Hinrich, Usoskin, Ilya, Turnbull, Jocelyn, Brailsford, Gordon, Nichol, Sylvia & Bromley, Tony, 2025, Nature Communications, 16, 249
6	Dendrochronology and Radiocarbon Dating Pearson, Charlotte L., Leavitt, Steven W., Kromer, Bernd, Solanki, Sami K. & Usoskin, Ilya, 2022, Radiocarbon, 64, 569
6	Annual integral solar proton fluences for 1984-2019 Raukunen, O., Usoskin, I., Koldobskiy, S., Kovaltsov, G. & Vainio, R., 2022, A&A, 665, A65
5	EMMA a new underground cosmic-ray experiment Enqvist, T., Joutsenvaara, J., Jämsén, T., Keränen, P., Kuusiniemi, P., Lehtola, M., Mattila, A., Narkilahti, J., Peltoniemi, J., Pennanen, A., Räihä, T., Sarkamo, J., Shen, C., Trzaska, W., Usoskin, I., Vaittinen, M. & Zhang, Z., 2008, Nuclear Physics B Proceedings Supplements, 175, 307
5	NEMESIS setup for Indirect Detection of WIMPs Trzaska, W. H., Barzilov, A., Enqvist, T., Jedrzejczak, K., Joutsenvaara, J., Kasztelan, M., Kotavaara, O., Kuusiniemi, P., Loo, K. K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I. & Ward, T. E., 2022, Nuclear Instruments and Methods in Physics Research A, 1040, 167223
5	Impact of Magnetic Environment on the Generation of High-Energy Neutrons at the Sun Kocharov, L. G., Torsti, J., Tang, F., Zirin, H., Kovaltsov, G. A. & Usoskin, I. G., 1997, Solar Physics, 172, 271
5	Neutron Monitor Data on the 15 June 1991 Flare: Neutrons as a Test for Proton Acceleration Scenario Kovaltsov, G. A., Usoskin, I. G., Kocharov, L. G., Kananen, H. & Tanskanen, P. J., 1995, Solar Physics, 158, 395
5	Usoskin et al. Reply: Usoskin, Ilya G., Solanki, Sami K., Schüssler, Manfred & Mursula, Kalevi, 2004, Physical Review Letters, 92, 199002
5	Neutron monitor yield function for solar neutrons: A new computation Artamonov, A. A., Kovaltsov, G. A., Mishev, A. L. & Usoskin, I. G., 2016, Journal of Geophysical Research (Space Physics), 121, 117
5	Revision of the strongest solar energetic particle event of 23 February 1956 (GLE #5) based on the rediscovered original records Hayakawa, Hisashi, Koldobskiy, Sergey, Mishev, Alexander, Poluianov, Stepan, Gil, Agnieszka, Usoskina, Inna & Usoskin, Ilya, 2024, A&A, 684, A46
5	Transmission and Emission of Solar Energetic Particles in Semi-transparent Shocks Kocharov, Leon, Laitinen, Timo, Usoskin, Ilya & Vainio, Rami, 2014, ApJ, 787, L21
5	Connections between neutron monitor count rate and solar modulation strength Usoskin, I. G., Gladysheva, O. G., Bobik, P., Kudela, K. & Kananen, H., 1999, Czechoslovak Journal of Physics, 49, 1743
4	Fluctuations of cosmic rays and IMF in the vicinity of interplanetary shocks Grigoryev, A. V., Starodubtsev, S. A., Grigoryev, V. G., Usoskin, I. G. & Mursula, K., 2008, Advances in Space Research, 41, 955
4	On-Line Database of Cosmic Ray Intensities* Usoskin, I. G., Mursula, K. & Kangas, J., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 9, p. 3842
4	Nitrate abundance in polar ice during the great solar activity minimum Gladysheva, O. G., Kocharov, G. E., Kovaltsov, G. A. & Usoskin, I. G., 2002, Advances in Space Research, 29, 1707
4	Waldmeier relations and the solar cycle dynamics by the mean-field dynamos Pipin, V. V., Sokoloff, D. D. & Usoskin, I. G., 2013, Solar and Astrophysical Dynamos and Magnetic Activity (Editors: Kosovichev, Alexander G., de Gouveia Dal Pino, Elisabete & Yan, Yihua), IAU Symposium, 294, p. 595
4	The impact of an extreme solar event on the middle atmosphere: a case study Reddmann, Thomas, Sinnhuber, Miriam, Wissing, Jan Maik, Yakovchuk, Olesya & Usoskin, Ilya, 2023, Atmospheric Chemistry & Physics, 23, 6989
4	High Altitude Polar NM With the New DAQ System as a Tool to Study Details of the Cosmic Ray Induced Nucleonic Cascade Similä, Markus, Usoskin, Ilya, Poluianov, Stepan, Mishev, Alexander, Kovaltsov, Gennady A. & Strauss, Du Toit, 2021, Journal of Geophysical Research (Space Physics), 126, e28959
4	Updated model of cosmic-ray-induced ionization in the atmosphere (CRAC:CRII_v3): Improved yield function and lookup tables Usoskin, I. G., Kovaltsov, G. A. & Mishev, A. L., 2024, Journal of Space Weather and Space Climate, 14, 20
4	Ground-Level Enhancement of 8 June 2024 (GLE 75) Caused by Solar Energetic Particles Poluianov, Stepan, Mishev, Alexander, Kryakunova, Olga, Seifullina, Botakoz, Nikolayevskiy, Nikolay & Usoskin, Ilya, 2025, Solar Physics, 300, 113
3	High Energy Gamma Rays from 1991 June 15 Solar Flare as Evidence of Proton Acceleration up to 10 GeV Kocharov, G. E., Chuikin, E. I., Kocharov, L. G., Kovaltsov, G. A., Melnikov, V. F., Podstrigach, T. S. & Usoskin, I. G., 1993, 23rd International Cosmic Ray Conference (ICRC23), Volume 3 (Editors: Leahy, D. A., Hicks, R. B. & Venkatesan, D.), International Cosmic Ray Conference, 3, p. 123
3	Solar activity over the last 1150 years: does it correlate with climate? Usoskin, I. G., Schüssler, M., Solanki, S. K. & Mursula, K., 2005, 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun (Editors: Favata, F., Hussain, G. A. J. & Battrick, B.), ESA Special Publication, 560, p. 19
3	Cosmogenic production and climate contributions to nitrate record in the TALDICE Antarctic ice core Poluianov, S., Traversi, R. & Usoskin, I., 2014, Journal of Atmospheric and Solar-Terrestrial Physics, 121, 50
3	Solar cycles reconstructed over the last millennium: Do Waldmeier and Gnevysev-Ohl rules work? Similä, Markus & Usoskin, Ilya, 2023, The Era of Multi-Messenger Solar Physics (Editors: Cauzzi, Gianna & Tritschler, Alexandra), IAU Symposium, 372, p. 70
3	A Geomagnetic Estimate of Heliospheric Modulation Potential over the Last 175 Years Owens, Mathew J., Barnard, Luke A., Muscheler, Raimund, Herbst, Konstantin, Lockwood, Mike, Usoskin, Ilya & Asvestari, Eleanna, 2024, Solar Physics, 299, 84
3	2D stochastic simulation model of cosmic ray modulation: comparison with experimental data Bobik, P., Gervasi, M., Grandi, D., Rancoita, P. G. & Usoskin, I. G., 2003, Solar Variability as an Input to the Earth's Environment (Editors: Wilson, Andrew), ESA Special Publication, 535, p. 637
3	Generation of neutrons during the solar flare of May 24, 1990 Koval'Tsov, G. A., Kocharov, G. E., Kocharov, L. G. & Usoskin, I. G., 1994, Astronomy Letters, 20, 658
3	New standpoints in long-term solar cycle evolution: a review Usoskin, I. G. & Mursula, K., 2003, Solar Variability as an Input to the Earth's Environment (Editors: Wilson, Andrew), ESA Special Publication, 535, p. 25
3	Calculation of the cosmic ray induced ionization for the region of Athens Makrantoni, P., Mavromichalaki, H., Usoskin, I. & Papaioannou, A., 2013, Journal of Physics Conference Series, Journal of Physics Conference Series, 409, p. 012232
3	Sensitivity of a neutron monitor to galactic cosmic rays Usoskin, I. G., Bobik, P., Gladysheva, O. G., Kananen, H., Kovaltsov, G. A. & Kudela, K., 2001, Advances in Space Research, 27, 565
3	Analysis of sub-GLE and GLE events using NM data: space weather applications Mishev, A. & Usoskin, I., 2019, Journal of Physics Conference Series, Journal of Physics Conference Series, 1181, p. 012006
3	The GLE of 14 July 2000: comparative analysis of increase effect on close neutron monitors in Apatity and Oulu Vashenyuk, E. V., Gvozdevsky, B. B., Phelkin, V. V., Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 8, p. 3383
3	Assessment of sunspot number cross-calibration approaches Chatzistergos, Theodosios, Krivova, Natalie A., Sundermann, Hannah & Usoskin, Ilya G., 2025, A&A, 699, A157
3	EMMA - an underground cosmic-ray experiment Enqvist, T., Bezrukov, L., Fynbo, H., Heikkilä, E., Inzhechik, L., Joutsenvaara, J., Jones, P., Jämsén, T., Kalliokoski, T., Keränen, P., Kolos, K., Kuusiniemi, P., Lubsandorzhiev, B., Olanterä, L., Petkov, V., Räihä, T., Sarkamo, J., Trzaska, W. & Usoskin, I., 2009, Nuclear Physics B Proceedings Supplements, 196, 255
3	Long-term modulation of the cosmic ray fluctuation spectrum Starodubtsev, S. A., Usoskin, I. G., Grigoryev, A. V. & Mursula, K., 2006, Annales Geophysicae, 24, 779
2	Simulation of Galactic Cosmic Ray Proton Fluxes With the Daily Modulation Parameter: Validation With AMS-02 Data for 2011─2019 Väisänen, Pauli, Bertucci, Bruna, Tomassetti, Nicola, Orcinha, Miguel, Usoskin, Ilya & Koldobskiy, Sergey, 2025, Journal of Geophysical Research (Space Physics), 130, e2025JA033805
2	Underground cosmic-ray experiment EMMA Enqvist, T., Joutsenvaara, J., Jämsén, T., Keränen, P., Kuusiniemi, P., Lehtola, M., Mattila, A., Narkilahti, J., Peltoniemi, J., Pennanen, A., Räihä, T., Sarkamo, J., Shen, C., Trzaska, W., Usoskin, I., Vaittinen, M. & Zhang, Z., 2007, Nuclear Physics B Proceedings Supplements, 165, 349
2	Wandering of the auroral oval 41,000 years ago Mukhopadhyay, Agnit, Panovska, Sanja, Garvey, Raven, Liemohn, Michael W., Ganjushkina, Natalia, Brenner, Austin, Usoskin, Ilya, Balikhin, Mikhail & Welling, Daniel T., 2025, Science Advances, 11, eadq7275
2	Solar Cycle in the Heliosphere and Cosmic Rays Bazilevskaya, Galina A., Cliver, Edward W., Kovaltsov, Gennady A., Ling, Alan G., Shea, M. A., Smart, D. F. & Usoskin, Ilya G., 2015, The Solar Activity Cycle (Editors: Balogh, André, Hudson, Hugh, Petrovay, Kristóf & von Steiger, Rudolf), p.409
2	What Can Be Learned from Modern Data? Kusano, K., Cliver, E., Hayakawa, H., Kovaltsov, G. A. & Usoskin, I. G., 2019, Extreme Solar Particle Storms (Editors: Miyake, Fusa, Usoskin, Ilya & Poluianov, Stepan), p.2
2	Fluctuations of cosmic rays and interplanetary magnetic field in the vicinity of interplanetary shock fronts Starodubtsev, S. A., Grigor'ev, A. V., Grigor'ev, V. G., Usoskin, I. G. & Mursula, K., 2007, Bulletin of the Russian Academy of Sciences, Physics, 71, 991
2	Using global neutron monitor network data for GLE analysis: recent results Mishev, A., Usoskin, I. & Kocharov, L., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 147
2	Solar Modulation Models:. a Comparison Through a 2d Stochastic Simulation Bobik, P., Gervasi, M., Grandi, D., Rancoita, P. G. & Usoskin, I. G., 2004, Astroparticle, Particle and Space Physics, Detectors and Medical Physics Applications (Editors: Barone, M., Borchi, E., Leroy, C., Rancoita, P.-G., Riboni, P.-L. & Ruchti, R.), p. 23
2	High-energy gamma-ray signature of proton acceleration during 1991 June 15 solar flare Kocharov, G. E., Chuikin, E. I., Kovaltsov, G. A., Usoskin, I. G. & Kocharov, L. G., 1994, High-Energy Solar Phenomena - a New Era of Spacecraft Measurements (Editors: Ryan, J. & Vestrand, W. T.), American Institute of Physics Conference Series, 294, p. 45
2	New SOCOL:14C-Ex model reveals that the Late-Glacial radiocarbon spike in 12350 BC was caused by the record-strong extreme solar storm Golubenko, Kseniia, Usoskin, Ilya, Rozanov, Eugene & Bard, Edouard, 2025, Earth and Planetary Science Letters, 661, 119383
2	New Anisotropic Cosmic-Ray Enhancement (ACRE) Event on 5 November 2023 Due to Complex Heliospheric Conditions Gil, Agnieszka, Asvestari, Eleanna, Mishev, Alexandar, Larsen, Nicholas & Usoskin, Ilya, 2024, Solar Physics, 299, 97
2	The start of the Dalton minimum: Was one sunspot cycle lost in late XVIII century? Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2002, Solspa 2001, Proceedings of the Second Solar Cycle and Space Weather Euroconference (Editors: Sawaya-Lacoste, Huguette), ESA Special Publication, 477, p. 257
2	Heliospheric modulation of galactic cosmic rays: Effective energy of ground-based detectors Gil, A., Asvestari, E., Kovaltsov, G. & Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 32
2	Impact of chlorine ion chemistry on ozone loss in the middle atmosphere during very large solar proton events Borthakur, Monali, Sinnhuber, Miriam, Laeng, Alexandra, Reddmann, Thomas, Braesicke, Peter, Stiller, Gabriele, von Clarmann, Thomas, Funke, Bernd, Usoskin, Ilya, Maik Wissing, Jan & Yakovchuk, Olesya, 2023, Atmospheric Chemistry & Physics, 23, 12985
2	Two Injections of High Energy Neutrons during the May 24, 1990 Solar Flare Kovaltsov, G. A., Kocharov, L. G., Usoskin, I. G., Kananen, H. & Taskanen, P., 1995, International Cosmic Ray Conference, International Cosmic Ray Conference, 4, p. 155
1	A review of Space Climate and an introduction to the papers of the JASTP special issue on Space Climate Mursula, Kalevi, Marsh, Dan, Nandy, Dibyendu & Usoskin, Ilya, 2011, Journal of Atmospheric and Solar-Terrestrial Physics, 73, 179
1	Numerical model of cosmic ray induced ionization in the atmosphere CRAC:CRII Usoskin, Ilya, 2011, International Cosmic Ray Conference, International Cosmic Ray Conference, 11, p. 343
1	Critical Comment on the Article by R. Rek ``The Maunder Minimum and the Sun as the Possible Source of Particles Creating Increased Abundance of the 14C Carbon Isotope'' Usoskin, I. G. & Kovaltsov, G. A., 2010, Solar Physics, 261, 353
1	History of cosmic ray research in Finland Usoskin, I. G., Valtonen, E., Vainio, R., Tanskanen, P. J. & Aurela, A. M., 2009, Advances in Space Research, 44, 1232
1	Long-Term Modulation of the Cosmic Ray Fluctuation Spectrum: Spacecraft Measurements Starodubtsev, S. A., Usoskin, I. G., Grigoryev, A. V. & Mursula, K., 2005, 29th International Cosmic Ray Conference (ICRC29), Volume 2 (Editors: Acharya, B. Sripathi, Gupta, Sunil, Jagadeesan, P., Jain, Atul, Karthikeyan, S., Morris, Samuel & Tonwar, Suresh), International Cosmic Ray Conference, 2, p. 247
1	Effective dose calculation at flight altitudes with the newly computed yield function Mishev, A. & Usoskin, I., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 158
1	A mini neutron monitor in Central Antarctica (Dome Concordia) Usoskin, I., Poluianov, S., Moraal, H., Krüger, H., Casasanta, G., Traversi, R. & Udisty, R., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 217
1	A two-wave dynamo model by Zharkova et al. (2015) disagrees with data on long-term solar variability Usoskin, I. & Kovaltsov, G., 2015, arXiv:1512.05516
1	Semi-empirical Long-term Reconstruction of the Heliospheric Parameters: Validation by Cosmogenic Radionuclide Records Asvestari, E., Usoskin, I. G., Cameron, R. H. & Krivova, N. A., 2016, Coimbra Solar Physics Meeting: Ground-based Solar Observations in the Space Instrumentation Era (Editors: Dorotovic, I., Fischer, C. E. & Temmer, M.), Astronomical Society of the Pacific Conference Series, 504, p. 269
1	Persistent Active Longitudes in Sunspot Activity: Sun-as-a-Star Approach Berdyugina, S. B. & Usoskin, I. G., 2004, Stars as Suns : Activity, Evolution and Planets (Editors: Dupree, Andrea K. & Benz, Arnold O.), IAU Symposium, 219, p. 128
1	Long-Term Cosmic Ray Modulation by Heliospheric Parameters: Non-linear Relations Usoskin, I. G., Kovaltsov, G. A., Mursula, K. & Alkano, K., 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 7, p. 3803
1	Neutron monitor database in real time Kozlov, Valery, Kudela, Karel, Starodubtsev, Sergei, Turpanov, Alexey, Usoskin, Ilya & Yanke, Victor, 2003, Solar Variability as an Input to the Earth's Environment (Editors: Wilson, Andrew), ESA Special Publication, 535, p. 675
1	Simulating regularity and randomness in sunspot activity Usoskin, I. G., Mursala, K. & Kovaltsov, G. A., 2002, Solar Variability: From Core to Outer Frontiers (Editors: Wilson, A.), ESA Special Publication, 2, p. 863
1	Geomagnetic cutoff Penumbra structure: approach by transmissivity function Bobik, P., Kudela, K. & Usoskin, I., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 10, p. 4056
1	Cosmic ray intensity vs. solar indices: Is there a simple linear relation? Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 9, p. 3838
1	Heliospheric modulation strength during the neutron monitor epoch Usoskin, I. G., Alanko, K., Mursula, K., Kudela, K. & Kovaltsov, G. A., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 9, p. 3810
1	Persistent 22-year Cycle in Sunspot Activity: Evidence for a Relic Solar Magnetic Field Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2000, The Solar Cycle and Terrestrial Climate, Solar and Space weather (Editors: Wilson, A.), ESA Special Publication, 463, p. 387
1	Secondary production antiproton flux: A comparison between interstellar models and expected flux at the Earth - presented by M. A. C. Potenza Boella, G., Gervasi, M., Potenza, M. A. C., Rancoita, P. G. & Usoskin, I., 1999, Vulcano Workshop 1998: Frontier Objects in Astrophysics and Particle Physics (Editors: Giovannelli, F. & Mannocchi, G.), 65, p. 379
1	The upgraded GLE database includes assessment of radiation exposure at flight altitudes Mishev, A., Usoskin, I., Tuohino, S. & Ibragimov, A., 2019, Journal of Physics Conference Series, Journal of Physics Conference Series, 1181, p. 012061
1	Introduction Usoskin, I. & Miyake, F., 2019, Extreme Solar Particle Storms (Editors: Miyake, Fusa, Usoskin, Ilya & Poluianov, Stepan), p.1
1	Impact of Magnetic Environment on the Generation of High-Energy Neutrons and Gamma-Rays During Solar Flares Kocharov, L. G., Kovaltsov, G., Torsti, J. & Usoskin, I., 1997, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 65
1	Solar Flare Neutrinos Kocharov, G. E., Kovaltsov, G. A. & Usoskin, I. G., 1991, International Cosmic Ray Conference, International Cosmic Ray Conference, 3, p. 752
1	Full Modeling and Practical Parameterization of Cosmogenic 10Be Transport for Cosmic-Ray Studies: SOCOL-AERv2-BE Model Golubenko, K., Rozanov, E., Kovaltsov, G., Baroni, M., Sukhodolov, T. & Usoskin, I., 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032504
1	Solar flares versus solar energetic particle events: Probabilistic projections to extreme events Koldobskiy, Sergey, Usoskin, Ilya, Vasilyev, Valeriy & Shapiro, Alexander I., 2025, A&A, 702, A195
1	14C-Based Sunspot Numbers for the Last Millennium Encompass the Full Range of Variability: Extreme Value Theory Acero, F. J., Carrasco, V. M. S., Gallego, M. C., Usoskin, I. G. & Vaquero, J. M., 2025, Solar Physics, 300, 50
1	A New neutron monitor yield function computed for different altitudes: Application for a GLE analysis Mishev, A., Usoskin, I. & Kovaltsov, G., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 159
0	Spectra of solar energetic particle and galactic cosmic rays over a million years reconstructed using aluminium-26 data from lunar rocks Poluianov, S., Kovaltsov, G. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1139
0	Multi-NM spectral slope analysis of long-term cosmic-ray variations at Earth Usoskin, I., Väisänen, P. & Mursula, K., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1165
0	Structure of the Power Spectral Density of Galactic Cosmic Ray Variation during 1953-2016 Väisänen, Pauli, Usoskin, Ilya & Mursula, Kalevi, 2018, Space Weather of the Heliosphere: Processes and Forecasts (Editors: Foullon, Claire & Malandraki, Olga E.), IAU Symposium, 335, p. 82
0	Regular and Random Components of Sunspot Activity during Active Sun and Great Minima: Model Simulation Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2000, The Solar Cycle and Terrestrial Climate, Solar and Space weather (Editors: Wilson, A.), ESA Special Publication, 463, p. 447
0	The MUG experiment for observing muon fluxes underground: test data and development plans Elo, A.-M., Jaemsen, T., Kangas, J., Mursula, K., Peltoniemi, J., Usoskin, I. G., Vallinkoski, M. & Valtonen, E., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 3, p. 1249
0	Influence of Galactic Cosmic Rays on the atmospheric composition and temperature Calisto, M., Peter, T., Rozanov, E. & Usoskin, I., 2010, 10th EMS Annual Meeting, p. EMS2010-718
0	Author Correction: Solar superstorm of AD 774 recorded subannually by Arctic tree rings Uusitalo, J., Arppe, L., Hackman, T., Helama, S., Kovaltsov, G., Mielikäinen, K., Mäkinen, H., Nöjd, P., Palonen, V., Usoskin, I. & Oinonen, M., 2019, Nature Communications, 10, 1292
0	Effect of the Solar Modulation at Minimum Activity on Expected Ratio of Antiproton to Proton Flux Boella, G., Gervasi, M., Potenza, M. A. C., Rancoita, P. G. & Usoskin, I., 1998, COSMO-97, First International Workshop on Particle Physics and the Early Universe (Editors: Roszkowski, Leszek), p. 273
0	A new multilevel experiment MUG for observing muon fluxes underground Jaemsen, T., Elo, A.-M., Kangas, J., Mursula, K., Peltoniemi, J., Usoskin, I. G., Vallinkoski, M. & Valtonen, E., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 3, p. 1250
0	Odd and even cycles in cosmic rays and solar activity Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 9, p. 3791
0	Period of Unusual Cosmic Ray Modulation in Late 20th Cycle: Correlative Study of Cosmic Ray variations vs. Solar Activity Usoskin, I. G., Kovaltsov, G. A., Kananen, H., Mursula, K. & Tanskanen, P., 1997, International Cosmic Ray Conference, International Cosmic Ray Conference, 2, p. 201
0	Long-term variation of solar surface differential rotation Zhang, L., Mursula, K., Usoskin, I., Wang, H. & Du, Z., 2011, Astronomical Society of India Conference Series, Astronomical Society of India Conference Series, 2, p. 175
0	Nitrate abundance in polar snow during last 50 year: connection to atmospheric ionization Gladysheva, O. G., Dmitriev, P. B., Usoskin, I. G., Barkov, N. I., Ekaykin, A. A. & Nikanorov, V. V., 2001, International Cosmic Ray Conference, International Cosmic Ray Conference, 10, p. 4191
0	Cosmogenic Isotopes as Proxies for Solar Energetic Particles Jull, T., Baroni, M., Feinberg, A., Kovaltsov, G., Mekhaldi, F., Muscheler, R., Poluianov, S., Rozanov, E., Sukhodolov, T. & Usoskin, I. G., 2019, Extreme Solar Particle Storms (Editors: Miyake, Fusa, Usoskin, Ilya & Poluianov, Stepan), p.4
0	Further Search for Extreme Events Miyake, F., Ebihara, Y., Hayakawa, H., Maehara, H., Mitsuma, Y., Usoskin, I., Wang, F. & Willis, D. M., 2019, Extreme Solar Particle Storms (Editors: Miyake, Fusa, Usoskin, Ilya & Poluianov, Stepan), p.7
0	Big Data Processing and Modeling in Solar Physics Huang, X., Usoskin, I., Zhang, L. Y. & Wang, H. N., 2020, Advances in Astronomy, 2020, 6967925
0	Phases of Charged Particles Acceleration during Powerful Solar Gamma-Flares Detected by the Gamma - 1 Galper, A. M., Luchkov, B. I., Ozerov, Yu. V., Khodarovich, A. M., Rinchinov, S. B., Kovaltsov, G. A. & Usoskin, I. G., 1997, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 169
0	Climate and Weather of the Sun - Earth System Usoskin, Ilya & Krivova, Natalie, 2012, Astronomy and Astrophysics (Editors: Engvold, Oddbj\orn, Stabell, Rolf, Czerny, Bozena & Lattanzio, John), p.397
0	Direct Deduction of the Number of Neutrons Injected from the Sun on the Basis of Neutron Monitor Response Kananen, H., Kovaltsov, G. A., Tanskanen, P. & Usoskin, I. G., 1997, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 49
0	Period of Unusual Modulation of Cosmic Ray Intensity: The Declining Phase of Cycle 20 Usoskin, I. G., Kananen, H., Mursula, K., Tanskanen, P. & Kovaltsov, G. A., 1997, Correlated Phenomena at the Sun, in the Heliosphere and in Geospace (Editors: Wilson, A.), ESA Special Publication, 415, p. 491
0	Origin of two extreme solar particle events Mishev, A., Kocharov, L., Pohjolainen, S., Reiner, M. J., Lee, J., Laitinen, T., Didkovsky, L. V., Pizzo, V. J., Kim, R., Klassen, A., Karlicky, M., Choj, K. S., Kovaltsov, G. A., Usoskin, I. G., Valtonen, E. & Vainio, R., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 146
0	Temporal and spectral characteristics of solar gamma flares observed in the Gamma-1 experiment. Galper, A. M., Zverev, V. G., Luchkov, B. I., Ozerov, Yu. V., Khodarovitch, A. M., Kovaltsov, G. A. & Usoskin, I. G., 1996, Journal of Moscow Physical Society, 6, 399
0	Extreme solar particle events: Can we assess the worst case scenario? Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 127
0	Analysis of Ground-Level Enhancements: Strong events are hard Usoskin, I., Asvestari, E., Willamo, T., Gil, A., Kovaltsov, G., Mikhailov, V. & Mayorov, A., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 126
0	Revisited definition of GLE Poluianov, S., Usoskin, I., Mishev, A., Smart, D. F. & Shea, M. A., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 125
0	Cosmogenic isotopes Be-7, Be-10, C-14, Na-22 and Cl-36 in the atmosphere: Altitudinal profiles of yield functions Poluianov, S., Kovaltsov, G., Mishev, A. & Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 124
0	Correlative Investigations of the 1990 May 24 Solar Flare Kocharov, L. G., Kovaltsov, G. A., Torsti, J., Usoskin, I. G. & Zirin, H., 1995, International Cosmic Ray Conference, International Cosmic Ray Conference, 4, p. 159
0	The energetic particle intensity estimated from cosmogenic isotope Al-26 produced in lunar samples Poluianov, S., Kovaltsov, G. & Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 123
0	Computation of electron precipitation atmospheric ionization: updated model CRAC-EPII Mishev, A., Artamonov, A., Kovaltsov, G., Mironova, I. & Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 86
0	High Energy Neutrons from the June 15, 1991 Solar Flare as Detected by the Neutron Monitor Usoskin, I. G., Kovaltsov, G. A., Kocharov, L. G., Kananen, H. & Tanskanen, P., 1995, International Cosmic Ray Conference, International Cosmic Ray Conference, 4, p. 151
0	Ground Level Enhancement Events: Interplanetary Protons versus Protons Interacting at the Sun. Kocharov, Leon, Usoskin, Ilya & Mishev, Alexander, 2021, essoar.10509182
0	Rapid Auroral Wandering During the Laschamps Event Mukhopadhyay, Agnit, Panovska, Sanja, Liemohn, Michael, Ganushkina, Natalia, Usoskin, Ilya, Balikhin, Michael & Welling, Daniel, 2021, essoar.10509349
0	The June 3, 1982 Solar Flare as a Test for Neutron Monitor Sensitivity for Solar Neutrons Kananen, H., Kocharov, L. G., Kovaltsov, G. A., Tanskanen, P. & Usoskin, I. G., 1995, International Cosmic Ray Conference, International Cosmic Ray Conference, 4, p. 147
0	Updated model CRAC:HEPII of atmospheric ionization due to high energy protons Mishev, A., Artamonov, A., Kovalstov, G. & Usoskin, I., 2017, 35th International Cosmic Ray Conference (ICRC2017), International Cosmic Ray Conference, 301, p. 79
0	Long-term cosmic ray intensity vs. solar proxies: a simple linear relation does not work Mursula, K., Usoskin, I. G. & Kovaltsov, G. A., 2002, Solspa 2001, Proceedings of the Second Solar Cycle and Space Weather Euroconference (Editors: Sawaya-Lacoste, Huguette), ESA Special Publication, 477, p. 463
0	The lost sunspot cycle: reanalysis of sunspot statistics Usoskin, Ilya G., Mursula, Kalevi & Kovaltsov, Gennady A., 2003, Solar Variability as an Input to the Earth's Environment (Editors: Wilson, Andrew), ESA Special Publication, 535, p. 161
0	On the reliability of monthly/yearly means calculated from sparse daily sunspot numbers Usoskin, Ilya G., Mursula, Kalevi & Kovaltsov, Gennady A., 2003, Solar Variability as an Input to the Earth's Environment (Editors: Wilson, Andrew), ESA Special Publication, 535, p. 165
0	Application of a full chain analysis using neutron monitor data for space weather studies Mishev, A. & Usoskin, I., 2016, arXiv:1612.07043
0	REal-time COsmic Ray Database (RECORD) Usoskin, I., Kozlov, Valery, Ksenofontov, Leonid, Kudela, Karel, Starodubtsev, Sergei, Turpanov, Alexey & Yanke, Victor, 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 6, p. 3473
0	A New Open-source Geomagnetosphere propagation tool (OTSO) and its applications Larsen, Nicholas, Mishev, Alexander L. & Usoskin, Ilya G., 2022, essoar.10512572
0	Multiproxy reconstructions of integral energy spectra for extreme solar particle events of 7176 BCE, 660 BCE, 775 CE and 994 CE Koldobskiy, Sergey A., Mekhaldi, Florian, Kovaltsov, Gennady A. & Usoskin, Ilya G., 2022, essoar.10512946
0	A 2D Stochastic Simulation of Galactic Cosmic Rays Transport in the Heliosphere Alanko, K. M., Usoskin, Ilya, Mursula, Kalevi & Kovaltsov, Gennady A., 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 7, p. 3851
0	Effective Energy of Neutron Monitors Alanko, K. M., Usoskin, I. G., Mursula, K. & Kovaltsov, G. A., 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 7, p. 3901
0	Galactic Cosmic Ray Fluctuations: Long-Term Modulation of Power Spectrum Usoskin, Ilya G. & Starodubtsev, S., 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 7, p. 3905
0	Long-Term Cosmic Ray Intensities: Physical Reconstruction Usoskin, I. G., Mursula, K., Solanki, S. K., Schuessler, M. & Kovaltsov, G. A., 2003, International Cosmic Ray Conference, International Cosmic Ray Conference, 7, p. 4041
0	The role of drifts in the galactic cosmic ray transport Alanko, K., Usoskin, I. G. & Mursula, K., 2005, 29th International Cosmic Ray Conference (ICRC29), Volume 2 (Editors: Acharya, B. Sripathi, Gupta, Sunil, Jagadeesan, P., Jain, Atul, Karthikeyan, S., Morris, Samuel & Tonwar, Suresh), International Cosmic Ray Conference, 2, p. 53
0	Sensitivity of the world-wide neutron monitor network to solar neutrons: A revised approach Artamonov, A., Kovaltsov, G., Mishev, A. Alexander & Usoskin, I., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 163
0	Detection of solar neutrinos by the worldwide network of neutron monitors Efimov, Yu. E., Koval'Tsov, G. A., Kocharov, G. E., Kocharov, L. G. & Usoskin, I. G., 1993, Rossijskaya Akademiya Nauk Izvestiya Seriya Fizicheskaya, 57, 142
0	Resolving multiple sources of solar relativistic particles Kocharov, L., Klassen, A., Usoskin, I. & Valtonen, E., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 57
0	Gamma-radiation from the solar flare of 15 June 1991 as evidence of long-term acceleration of protons up to 10 GeV Koval'Tsov, G. A., Kocharov, G. E., Kocharov, L. G., Mel'Nikov, V. F., Podstrigach, T. S., Usoskin, I. G. & Chujkin, E. I., 1993, Rossijskaya Akademiya Nauk Izvestiya Seriya Fizicheskaya, 57, 138
0	Use of cosmogenic radionuclides 14C and 10Be to verify empirically reconstructed cosmic ray modulation since 1616 Asvestari, E., Usoskin, I. & Kovaltsov, G., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 53
0	Flux of solar energetic particles in the distant past: Data from lunar rocks Poluianov, S., Artamonov, A., Kovaltsov, G. & Usoskin, I., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 51
0	Assessment of F200 fluence for major solar energetic particle events on the multi-millennial time scale Usoskin, I., Kovaltsov, G., Cliver, E., Dietrich, W. F. & Tylka, A., 2015, 34th International Cosmic Ray Conference (ICRC2015), International Cosmic Ray Conference, 34, p. 18
0	Simulation of Galactic cosmic ray proton fluxes with the daily modulation potential: Validation with AMS02 data for 2011-2019 Väisänen, Pauli Kalervo, Bertucci, Bruna, Tomassetti, Nicola, Orcinha, Miguel, Usoskin, Ilya G. & Koldobskiy, Sergey A., 2025, essoar.173532496
0	Real-Time Cosmic Ray Distributed (RECORD) database: A status report Starodubtsev, S. A., Turpanov, A. A., Kudela, K., Usoskin, I. G., Yanke, V. G., Grigoryev, V. G., Neustroyev, N. I., Egorov, A. G. & Prikhodko, A. N., 2005, 29th International Cosmic Ray Conference (ICRC29), Volume 2 (Editors: Acharya, B. Sripathi, Gupta, Sunil, Jagadeesan, P., Jain, Atul, Karthikeyan, S., Morris, Samuel & Tonwar, Suresh), International Cosmic Ray Conference, 2, p. 465
0	Nature's Third Cycle: A Story of Sunspots Usoskin, Ilya, 2015, American Journal of Physics, 83, 984
0	Establishing a Cosmic Ray Station and Other Space Research Facilities in Ethiopia Damtie, B., Bosinger, T. & Usoskin, I., 2006, African Skies, 10, 29
0	Solar modulation of cosmic rays since 1936: Neutron monitors and balloon-borne data Usoskin, Ilya, 2011, International Cosmic Ray Conference, International Cosmic Ray Conference, 11, p. 39
0	Link Between Cosmic Rays and Clouds on Different Time Scales Usoskin, Ilya G. & Kovaltsov, Gennady A., 2006, Advances in Geosciences, Volume 2: Solar Terrestrial (ST) (Editors: Duldig, Marc), 2, p. 321
0	Rapid cosmic ray fluctuations in real-time during the SEP events in December 2006 Starodubtsev, S. A., Grigoryev, A. V., Usoskin, I. G. & Mursula, K., 2008, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 135
0	On the dimension of the solar attractor. Ostryakov, V. M. & Usoskin, I. G., 1988, Byulletin Solnechnye Dannye Akademie Nauk SSSR, 1988, 91
0	Forbush decreases: Energy dependence of the recovery Usoskin, Ilya G., Kovaltsov, Gennady A., Gladysheva, Olga G. & Jämsén, Teppo, 2008, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 327
0	Stochastic simulation of cosmic ray modulation: Effect of a wavy HCS Usoskin, Ilya G., Alanko-Huotari, Katja, Mursula, Kalevi & Kovaltsov, Gennady A., 2008, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 459
0	Numerical Model of Cosmic Ray Induced Ionization in the Atmosphere Usoskin, Ilya G. & Kovaltsov, Gennady A., 2008, International Cosmic Ray Conference, International Cosmic Ray Conference, 1, p. 705
0	Forecast of the arrival of interplanetary shocks by measuring cosmic ray fluctuations in the interplanetary medium Starodubtsev, S. A., Grigoryev, V. G. & Usoskin, I. G., 2013, Journal of Physics Conference Series, Journal of Physics Conference Series, 409, p. 012180
0	Fluctuations of energetic particle flux during solar cycle based on measurements in the solar wind, in the magnetosphere, and at Earth Starodubtsev, S. A. & Usoskin, I. G., 2010, Astronomy Letters, 36, 438
0	Long term Solar/heliospheric variability Usoskin, Ilya, 2011, International Cosmic Ray Conference, International Cosmic Ray Conference, 11, p. 131
0	Reduced Geomagnetic Shielding During the Laschamps Excursion and Its Impact on Cosmic-Ray-Induced Atmospheric Radiation Larsen, N., Usoskin, I., Mishev, A., Koldobskiy, S. & Väisänen, P., 2026, Journal of Geophysical Research (Space Physics), 131, e2025JA034820
0	Time Evolution of Solar Activity and Cosmic Ray Intensity during the Maunder Minimum Usoskin, I. G., 1999, 26th International Cosmic Ray Conference (ICRC26), Volume 7 (Editors: Kieda, D., Salamon, M. & Dingus, B.), International Cosmic Ray Conference, 7, p. 127
0	An Oracle© Database for the AMS experiment Boschini, M., Gervasi, M., Grandi, D., Rancoita, P. G., Trombetta, L. & Usoskin, I. G., 1999, Nuclear Physics B Proceedings Supplements, 78, 727
0	A neutron monitor as an integral spectrometer for GLE analysis: Effective rigidity and reassessment of integral fluxes Koldobskiy, S., Mishev, A., Kovaltsov, G. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1093
0	Validation of the neutron monitor yield functions using data from AMS-02 and PAMELA experiments, 2006-2017 Koldobskiy, S., Bindi, V., Corti, C., Kovaltsov, G. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1094
0	Usage of the global NM network for assessment of the radiation exposure at flight altitudes Mishev, A. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1123
0	Spectra of extreme GLEs derived using neutron monitor network records Mishev, A. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1124
0	Neutron monitor yield function at several altitudes above sea level: new improved computation Mishev, A., Kovaltsov, G. & Usoskin, I., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1125
0	Cosmic-ray variability on the multi-millennial time scale: A new multi-proxy reconstruction Usoskin, I., Wu, C. J., Krivova, N., Solanki, S. K., Kovaltsov, G., Baroni, M. & Bard, E., 2019, 36th International Cosmic Ray Conference (ICRC2019), International Cosmic Ray Conference, 36, p. 1164