Publications of Rajkumar Hajra ordered by citations

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

Orcid ID: 0000-0003-0447-1531

102	Solar cycle dependence of High-Intensity Long-Duration Continuous AE Activity (HILDCAA) events, relativistic electron predictors? Hajra, R., Echer, E., Tsurutani, B. T. & Gonzalez, W. D., 2013, Journal of Geophysical Research (Space Physics), 118, 5626
85	Extremely intense (SML ≤-2500 nT) substorms: isolated events that are externally triggered? Tsurutani, B. T., Hajra, R., Echer, E. & Gjerloev, J. W., 2015, Annales Geophysicae, 33, 519
70	The physics of space weather/solar-terrestrial physics (STP): what we know now and what the current and future challenges are Tsurutani, Bruce T., Lakhina, Gurbax S. & Hajra, Rajkumar, 2020, Nonlinear Processes in Geophysics, 27, 75
68	Relativistic (e > 0.6, > 2.0, and > 4.0 MeV) Electron Acceleration at Geosynchronous Orbit during High-intensity, Long-duration, Continuous AE Activity (HILDCAA) Events Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D. & Santolik, Ondrej, 2015, ApJ, 799, 39
64	Heliospheric plasma sheet (HPS) impingement onto the magnetosphere as a cause of relativistic electron dropouts (REDs) via coherent EMIC wave scattering with possible consequences for climate change mechanisms Tsurutani, B. T., Hajra, R., Tanimori, T., Takada, A., Bhanu, R., Mannucci, A. J., Lakhina, G. S., Kozyra, J. U., Shiokawa, K., Lee, L. C., Echer, E., Reddy, R. V. & Gonzalez, W. D., 2016, Journal of Geophysical Research (Space Physics), 121, 10,130
58	Relativistic electron acceleration during high-intensity, long-duration, continuous AE activity (HILDCAA) events: Solar cycle phase dependences Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel & Gonzalez, Walter D., 2014, Geophysical Research Letters, 41, 1876
57	The Comet Interceptor Mission Jones, Geraint H., Snodgrass, Colin, Tubiana, Cecilia, Küppers, Michael, Kawakita, Hideyo, Lara, Luisa M., Agarwal, Jessica, André, Nicolas, Attree, Nicholas, Auster, Uli, Bagnulo, Stefano, Bannister, Michele, Beth, Arnaud, Bowles, Neil, Coates, Andrew, Colangeli, Luigi, Corral van Damme, Carlos, Da Deppo, Vania, De Keyser, Johan, Della Corte, Vincenzo, Edberg, Niklas, El-Maarry, Mohamed Ramy, Faggi, Sara, Fulle, Marco, Funase, Ryu, Galand, Marina, Goetz, Charlotte, Groussin, Olivier, Guilbert-Lepoutre, Aurélie, Henri, Pierre, Kasahara, Satoshi, Kereszturi, Akos, Kidger, Mark, Knight, Matthew, Kokotanekova, Rosita, Kolmasova, Ivana, Kossacki, Konrad, Kührt, Ekkehard, Kwon, Yuna, La Forgia, Fiorangela, Levasseur-Regourd, Anny-Chantal, Lippi, Manuela, Longobardo, Andrea, Marschall, Raphael, Morawski, Marek, Muñoz, Olga, Näsilä, Antti, Nilsson, Hans, Opitom, Cyrielle, Pajusalu, Mihkel, Pommerol, Antoine, Prech, Lubomir, Rando, Nicola, Ratti, Francesco, Rothkaehl, Hanna, Rotundi, Alessandra, Rubin, Martin, Sakatani, Naoya, Sánchez, Joan Pau, Simon Wedlund, Cyril, Stankov, Anamarija, Thomas, Nicolas, Toth, Imre, Villanueva, Geronimo, Vincent, Jean-Baptiste, Volwerk, Martin, Wurz, Peter, Wielders, Arno, Yoshioka, Kazuo, Aleksiejuk, Konrad, Alvarez, Fernando, Amoros, Carine, Aslam, Shahid, Atamaniuk, Barbara, Baran, Jedrzej, Barciński, Tomasz, Beck, Thomas, Behnke, Thomas, Berglund, Martin, Bertini, Ivano, Bieda, Marcin, Binczyk, Piotr, Busch, Martin-Diego, Cacovean, Andrei, Capria, Maria Teresa, Carr, Chris, Castro Marín, José María, Ceriotti, Matteo, Chioetto, Paolo, Chuchra-Konrad, Agata, Cocola, Lorenzo, Colin, Fabrice, Crews, Chiaki, Cripps, Victoria, Cupido, Emanuele, Dassatti, Alberto, Davidsson, Björn J. R., De Roche, Thierry, Deca, Jan, Del Togno, Simone, Dhooghe, Frederik, Donaldson Hanna, Kerri, Eriksson, Anders, Fedorov, Andrey, Fernández-Valenzuela, Estela, Ferretti, Stefano, Floriot, Johan, Frassetto, Fabio, Fredriksson, Jesper, Garnier, Philippe, Gaweł, Dorota, Génot, Vincent, Gerber, Thomas, Glassmeier, Karl-Heinz, Granvik, Mikael, Grison, Benjamin, Gunell, Herbert, Hachemi, Tedjani, Hagen, Christian, Hajra, Rajkumar, Harada, Yuki, Hasiba, Johann, Haslebacher, Nico, Herranz De La Revilla, Miguel Luis, Hestroffer, Daniel, Hewagama, Tilak, Holt, Carrie, Hviid, Stubbe, Iakubivskyi, Iaroslav, Inno, Laura, Irwin, Patrick, Ivanovski, Stavro, Jansky, Jiri, Jernej, Irmgard, Jeszenszky, Harald, Jimenéz, Jaime, Jorda, Laurent, Kama, Mihkel, Kameda, Shingo, Kelley, Michael S. P., Klepacki, Kamil, Kohout, Tomáš, Kojima, Hirotsugu, Kowalski, Tomasz, Kuwabara, Masaki, Ladno, Michal, Laky, Gunter, Lammer, Helmut, Lan, Radek, Lavraud, Benoit, Lazzarin, Monica, Le Duff, Olivier, Lee, Qiu-Mei, Lesniak, Cezary, Lewis, Zoe, Lin, Zhong-Yi, Lister, Tim, Lowry, Stephen, Magnes, Werner, Markkanen, Johannes, Martinez Navajas, Ignacio, Martins, Zita, Matsuoka, Ayako, Matyjasiak, Barbara, Mazelle, Christian, Mazzotta Epifani, Elena, Meier, Mirko, Michaelis, Harald, Micheli, Marco, Migliorini, Alessandra, Millet, Aude-Lyse, Moreno, Fernando, Mottola, Stefano, Moutounaick, Bruno, Muinonen, Karri, Müller, Daniel R., Murakami, Go, Murata, Naofumi, Myszka, Kamil, Nakajima, Shintaro, Nemeth, Zoltan, Nikolajev, Artiom, Nordera, Simone, Ohlsson, Dan, Olesk, Aire, Ottacher, Harald, Ozaki, Naoya, Oziol, Christophe, Patel, Manish, Savio Paul, Aditya, Penttilä, Antti, Pernechele, Claudio, Peterson, Joakim, Petraglio, Enrico, Piccirillo, Alice Maria, Plaschke, Ferdinand, Polak, Szymon, Postberg, Frank, Proosa, Herman, Protopapa, Silvia, Puccio, Walter, Ranvier, Sylvain, Raymond, Sean, Richter, Ingo, Rieder, Martin, Rigamonti, Roberto, Ruiz Rodriguez, Irene, Santolik, Ondrej, Sasaki, Takahiro, Schrödter, Rolf, Shirley, Katherine, Slavinskis, Andris, Sodor, Balint, Soucek, Jan, Stephenson, Peter, Stöckli, Linus, Szewczyk, Paweł, Troznai, Gabor, Uhlir, Ludek, Usami, Naoto, Valavanoglou, Aris, Vaverka, Jakub, Wang, Wei, Wang, Xiao-Dong, Wattieaux, Gaëtan, Wieser, Martin, Wolf, Sebastian, Yano, Hajime, Yoshikawa, Ichiro, Zakharov, Vladimir, Zawistowski, Tomasz, Zuppella, Paola, Rinaldi, Giovanna & Ji, Hantao, 2024, Space Science Reviews, 220, 9
55	Supersubstorms (SML < -2500 nT): Magnetic storm and solar cycle dependences Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D. & Gjerloev, Jesper W., 2016, Journal of Geophysical Research (Space Physics), 121, 7805
55	Diamagnetic region(s): structure of the unmagnetized plasma around Comet 67P/CG Henri, P., Vallières, X., Hajra, R., Goetz, C., Richter, I., Glassmeier, K.-H., Galand, M., Rubin, M., Eriksson, A. I., Nemeth, Z., Vigren, E., Beth, A., Burch, J. L., Carr, C., Nilsson, H., Tsurutani, B. & Wattieaux, G., 2017, MNRAS, 469, S372
51	Space Plasma Physics: A Review Tsurutani, Bruce T., Zank, Gary P., Sterken, Veerle J., Shibata, Kazunari, Nagai, Tsugunobu, Mannucci, Anthony J., Malaspina, David M., Lakhina, Gurbax S., Kanekal, Shrikanth G., Hosokawa, Keisuke, Horne, Richard B., Hajra, Rajkumar, Glassmeier, Karl-Heinz, Gaunt, C. Trevor, Chen, Peng-Fei & Akasofu, Syun-Ichi, 2023, IEEE Transactions on Plasma Science, 51, 1595
51	Plasma source and loss at comet 67P during the Rosetta mission Heritier, K. L., Galand, M., Henri, P., Johansson, F. L., Beth, A., Eriksson, A. I., Vallières, X., Altwegg, K., Burch, J. L., Carr, C., Ducrot, E., Hajra, R. & Rubin, M., 2018, A&A, 618, A77
49	Solar wind-magnetosphere energy coupling efficiency and partitioning: HILDCAAs and preceding CIR storms during solar cycle 23 Hajra, Rajkumar, Echer, Ezequiel, Tsurutani, Bruce T. & Gonzalez, Walter D., 2014, Journal of Geophysical Research (Space Physics), 119, 2675
47	The Interplanetary and Magnetospheric causes of Geomagnetically Induced Currents (GICs) > 10 A in the Mäntsälä Finland Pipeline: 1999 through 2019 Tsurutani, Bruce T. & Hajra, Rajkumar, 2021, Journal of Space Weather and Space Climate, 11, 23
46	The Complex Space Weather Events of 2017 September Hajra, Rajkumar, Tsurutani, Bruce T. & Lakhina, Gurbax S., 2020, ApJ, 899, 3
46	Electromagnetic cyclotron waves in the dayside subsolar outer magnetosphere generated by enhanced solar wind pressure: EMIC wave coherency Remya, B., Tsurutani, B. T., Reddy, R. V., Lakhina, G. S. & Hajra, R., 2015, Journal of Geophysical Research (Space Physics), 120, 7536
44	Interplanetary Shocks Inducing Magnetospheric Supersubstorms (SML < -2500 nT): Unusual Auroral Morphologies and Energy Flow Hajra, Rajkumar & Tsurutani, Bruce T., 2018, ApJ, 858, 123
43	Interplanetary Causes and Impacts of the 2024 May Superstorm on the Geosphere: An Overview Hajra, Rajkumar, Tsurutani, Bruce Tsatnam, Lakhina, Gurbax Singh, Lu, Quanming & Du, Aimin, 2024, ApJ, 974, 264
31	Lower-Band "Monochromatic" Chorus Riser Subelement/Wave Packet Observations Tsurutani, Bruce T., Chen, Rui, Gao, Xinliang, Lu, Quanming, Pickett, Jolene S., Lakhina, Gurbax S., Sen, Abhijit, Hajra, Rajkumar, Park, Sang A. & Falkowski, Barbara J., 2020, Journal of Geophysical Research (Space Physics), 125, e28090
31	Superposed epoch analyses of HILDCAAs and their interplanetary drivers: Solar cycle and seasonal dependences Hajra, Rajkumar, Echer, Ezequiel, Tsurutani, Bruce T. & Gonzalez, Walter D., 2014, Journal of Atmospheric and Solar-Terrestrial Physics, 121, 24
30	A study on the main periodicities in interplanetary magnetic field Bz component and geomagnetic AE index during HILDCAA events using wavelet analysis Souza, A. M., Echer, E., Bolzan, M. J. A. & Hajra, R., 2016, Journal of Atmospheric and Solar-Terrestrial Physics, 149, 81
30	An empirical model of ionospheric total electron content (TEC) near the crest of the equatorial ionization anomaly (EIA) Hajra, Rajkumar, Chakraborty, Shyamal Kumar, Tsurutani, Bruce T., DasGupta, Ashish, Echer, Ezequiel, Brum, Christiano G. M., Gonzalez, Walter D. & Sobral, José Humberto Andrade, 2016, Journal of Space Weather and Space Climate, 6, A29
30	Relativistic electron acceleration during HILDCAA events: are precursor CIR magnetic storms important? Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D., Brum, Christiano Garnett Marques, Vieira, Luis Eduardo Antunes & Santolik, Ondrej, 2015, Earth, Planets and Space, 67, 109
30	Plasmaspheric Hiss: Coherent and Intense Tsurutani, Bruce T., Park, Sang A., Falkowski, Barbara J., Lakhina, Gurbax S., Pickett, Jolene S., Bortnik, Jacob, Hospodarsky, George, Santolik, Ondrej, Parrot, Michel, Henri, Pierre & Hajra, Rajkumar, 2018, Journal of Geophysical Research (Space Physics), 123, 10,009
29	Cometary plasma response to interplanetary corotating interaction regions during 2016 June-September: a quantitative study by the Rosetta Plasma Consortium Hajra, Rajkumar, Henri, Pierre, Myllys, Minna, Héritier, Kevin L., Galand, Marina, Simon Wedlund, Cyril, Breuillard, Hugo, Behar, Etienne, Edberg, Niklas J. T., Goetz, Charlotte, Nilsson, Hans, Eriksson, Anders I., Goldstein, Raymond, Tsurutani, Bruce T., Moré, Jerome, Vallières, Xavier & Wattieaux, Gaetan, 2018, MNRAS, 480, 4544
28	Impact of a cometary outburst on its ionosphere. Rosetta Plasma Consortium observations of the outburst exhibited by comet 67P/Churyumov-Gerasimenko on 19 February 2016 Hajra, R., Henri, P., Vallières, X., Galand, M., Héritier, K., Eriksson, A. I., Odelstad, E., Edberg, N. J. T., Burch, J. L., Broiles, T., Goldstein, R., Glassmeier, K. H., Richter, I., Goetz, C., Tsurutani, B. T., Nilsson, H., Altwegg, K. & Rubin, M., 2017, A&A, 607, A34
28	Corotating Interaction Regions during Solar Cycle 24: A Study on Characteristics and Geoeffectiveness Hajra, Rajkumar & Sunny, Jibin V., 2022, Solar Physics, 297, 30
27	Long Term Variations of the Geomagnetic Activity: A Comparison Between the Strong and Weak Solar Activity Cycles and Implications for the Space Climate Hajra, Rajkumar, Marques de Souza Franco, Adriane, Echer, Ezequiel & José Alves Bolzan, Mauricio, 2021, Journal of Geophysical Research (Space Physics), 126, e28695
27	Weakest Solar Cycle of the Space Age: A Study on Solar Wind-Magnetosphere Energy Coupling and Geomagnetic Activity Hajra, Rajkumar, 2021, Solar Physics, 296, 33
26	Electrojet control of ambient ionization near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2009, Annales Geophysicae, 27, 93
25	Solar control of ambient ionization of the ionosphere near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2008, Annales Geophysicae, 26, 47
24	Cross-correlation and cross-wavelet analyses of the solar wind IMF Bz and auroral electrojet index AE coupling during HILDCAAs Marques de Souza, Adriane, Echer, Ezequiel, José Alves Bolzan, Mauricio & Hajra, Rajkumar, 2018, Annales Geophysicae, 36, 205
23	Energetics of Shock-triggered Supersubstorms (SML < -2500 nT) Tsurutani, Bruce T. & Hajra, Rajkumar, 2023, ApJ, 946, 17
22	Near-Earth Sub-Alfvénic Solar Winds: Interplanetary Origins and Geomagnetic Impacts Hajra, Rajkumar & Tsurutani, Bruce T., 2022, ApJ, 926, 135
20	A correlation study regarding the AE index and ACE solar wind data for Alfvénic intervals using wavelet decomposition and reconstruction Guarnieri, Fernando L., Tsurutani, Bruce T., Vieira, Luis E. A., Hajra, Rajkumar, Echer, Ezequiel, Mannucci, Anthony J. & Gonzalez, Walter D., 2018, Nonlinear Processes in Geophysics, 25, 67
20	The April 2023 SYM-H = ‒233 nT Geomagnetic Storm: A Classical Event Hajra, Rajkumar, Tsurutani, Bruce Tsatnam, Lu, Quanming, Horne, Richard B., Lakhina, Gurbax Singh, Yang, Xu, Henri, Pierre, Du, Aimin, Gao, Xingliang, Wang, Rongsheng & Lu, San, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032986
19	Dynamic unmagnetized plasma in the diamagnetic cavity around comet 67P/Churyumov-Gerasimenko Hajra, Rajkumar, Henri, Pierre, Vallières, Xavier, Moré, Jerome, Gilet, Nicolas, Wattieaux, Gaetan, Goetz, Charlotte, Richter, Ingo, Tsurutani, Bruce T., Gunell, Herbert, Nilsson, Hans, Eriksson, Anders I., Nemeth, Zoltan, Burch, James L. & Rubin, Martin, 2018, MNRAS, 475, 4140
19	Magnetospheric "Killer" Relativistic Electron Dropouts (REDs) and Repopulation: A Cyclical Process Hajra, Rajkumar & Tsurutani, Bruce T., 2018, Extreme Events in Geospace. Origins, Predictability, and Consequences (Editors: Buzulukova, Natalia), p.373
18	Comment on "Modeling Extreme "Carrington-Type" Space Weather Events Using Three-Dimensional Global MHD Simulations" by C. M. Ngwira, A. Pulkkinen, M. M. Kuznetsova, and A. Glocer" Tsurutani, Bruce T., Lakhina, Gurbax S., Echer, Ezequiel, Hajra, Rajkumar, Nayak, Chinmaya, Mannucci, Anthony J. & Meng, Xing, 2018, Journal of Geophysical Research (Space Physics), 123, 1388
17	Medium-Range Thermosphere-Ionosphere Storm Forecasts Mannucci, A. J., Verkhoglyadova, O. P., Tsurutani, B. T., Meng, X., Pi, X., Wang, C., Rosen, G., Lynch, E., Sharma, S., Ridley, A., Manchester, W., Van Der Holst, B., Echer, E. & Hajra, R., 2015, Space Weather, 13, 125
17	Seasonal features of geomagnetic activity: a study on the solar activity dependence Marques de Souza Franco, Adriane, Hajra, Rajkumar, Echer, Ezequiel & José Alves Bolzan, Mauricio, 2021, Annales Geophysicae, 39, 929
16	Characterization of high-intensity, long-duration continuous auroral activity (HILDCAA) events using recurrence quantification analysis Mendes, Odim, Oliveira Domingues, Margarete, Echer, Ezequiel, Hajra, Rajkumar & Everton Menconi, Varlei, 2017, Nonlinear Processes in Geophysics, 24, 407
16	High-speed solar wind stream effects on the topside ionosphere over Arecibo: A case study during solar minimum Hajra, Rajkumar, Tsurutani, Bruce T., Brum, Christiano G. M. & Echer, Ezequiel, 2017, Geophysical Research Letters, 44, 7607
15	Estimation of energy budget of ionosphere-thermosphere system during two CIR-HSS events: observations and modeling Verkhoglyadova, Olga, Meng, Xing, Mannucci, Anthony J., Tsurutani, Bruce T., Hunt, Linda A., Mlynczak, Martin G., Hajra, Rajkumar & Emery, Barbara A., 2016, Journal of Space Weather and Space Climate, 6, A20
14	Properties of the singing comet waves in the 67P/Churyumov-Gerasimenko plasma environment as observed by the Rosetta mission Breuillard, H., Henri, P., Bucciantini, L., Volwerk, M., Karlsson, T., Eriksson, A., Johansson, F., Odelstad, E., Richter, I., Goetz, C., Vallières, X. & Hajra, R., 2019, A&A, 630, A39
14	Intense, Long-Duration Geomagnetically Induced Currents (GICs) Caused by Intense Substorm Clusters Hajra, Rajkumar, 2022, Space Weather, 20, e2021SW002937
13	Review of the August 1972 and March 1989 (Allen) Space Weather Events: Can We Learn Anything New From Them? Tsurutani, Bruce T., Sen, Abhijit, Hajra, Rajkumar, Lakhina, Gurbax S., Horne, Richard B. & Hada, Tohru, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032622
13	Variation of the Interplanetary Shocks in the Inner Heliosphere Hajra, Rajkumar, 2021, ApJ, 917, 91
12	Low Frequency (f < 200 Hz) Polar Plasmaspheric Hiss: Coherent and Intense Tsurutani, Bruce T., Park, Sang A., Falkowski, Barbara J., Bortnik, Jacob, Lakhina, Gurbax S., Sen, Abhijit, Pickett, Jolene S., Hajra, Rajkumar, Parrot, Michell & Henri, Pierre, 2019, Journal of Geophysical Research (Space Physics), 124, 10,063
12	Plasma density structures at comet 67P/Churyumov-Gerasimenko Engelhardt, I. A. D., Eriksson, A. I., Stenberg Wieser, G., Goetz, C., Rubin, M., Henri, P., Nilsson, H., Odelstad, E., Hajra, R. & Vallières, X., 2018, MNRAS, 477, 1296
11	Geomagnetically induced currents (GICs) during strong geomagnetic activity (storms, substorms, and magnetic pulsations) on 23─24 April 2023 Despirak, Irina, Setsko, Pavel, Lubchich, Andris, Hajra, Rajkumar, Sakharov, Yaroslav, Lakhina, Gurbax, Selivanov, Vasiliy & Tsurutani, Bruce Tsatnam, 2024, Journal of Atmospheric and Solar-Terrestrial Physics, 261, 106293
11	Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations Hajra, Rajkumar, Tsurutani, Bruce T., Lakhina, Gurbax S., Lu, Quanming, Du, Aimin & Shan, Lican, 2023, ApJ, 951, 75
11	Electrodynamical control of the ambient ionization near the equatorial anomaly crest in the Indian zone during counter electrojet days Hajra, R., Chakraborty, S. K. & Paul, A., 2009, Radio Science, 44, RS3009
10	Three-Dimensional Global Hybrid Simulations of Mercury's Disappearing Dayside Magnetosphere Guo, Jin, Lu, San, Lu, Quanming, Slavin, James A., Sun, Weijie, Ren, Junyi, Wang, Xueyi, Lin, Yu, Hajra, Rajkumar & Wang, Rongsheng, 2023, Journal of Geophysical Research (Planets), 128, e2023JE008032
10	Interplanetary Sheaths and Corotating Interaction Regions: A Comparative Statistical Study on Their Characteristics and Geoeffectiveness Hajra, Rajkumar, Sunny, Jibin V., Babu, Megha & Nair, Archana Giri, 2022, Solar Physics, 297, 97
10	Intense Geomagnetically Induced Currents (GICs): Association with Solar and Geomagnetic Activities Hajra, Rajkumar, 2022, Solar Physics, 297, 14
9	The Structure and Microstructure of Rising-Tone Chorus With Frequencies Crossing at f ∼ 0.5 fce Chen, Rui, Tsurutani, Bruce T., Gao, Xinliang, Lu, Quanming, Chen, Huayue, Lakhina, Gurbax S. & Hajra, Rajkumar, 2022, Journal of Geophysical Research (Space Physics), 127, e30438
9	September 2017 Space-Weather Events: A Study on Magnetic Reconnection and Geoeffectiveness Hajra, Rajkumar, 2021, Solar Physics, 296, 50
9	Evolution of equatorial irregularities under varying electrodynamical conditions: A multitechnique case study from Indian longitude zone Hajra, R., Chakraborty, S. K., Mazumdar, S. & Alex, S., 2012, Journal of Geophysical Research (Space Physics), 117, A08331
7	Ionospheric scintillation near the anomaly crest in relation to the variability of ambient ionization Chakraborty, S. K., Hajra, R. & Dasgupta, A., 2012, Radio Science, 47, RS2006
7	Variability of total electron content near the crest of the equatorial anomaly during moderate geomagnetic storms Chakraborty, S. K. & Hajra, R., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 900
7	Ultra-relativistic Electron Acceleration during High-intensity Long-duration Continuous Auroral Electrojet Activity Events Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Lakhina, Gurbax S., Du, Aimin, Echer, Ezequiel, Franco, Adriane M. S., Bolzan, Mauricio J. A. & Gao, Xinliang, 2024, ApJ, 965, 146
7	Earth's magnetotail variability during supersubstorms (SSSs): A study on solar wind-magnetosphere-ionosphere coupling Hajra, Rajkumar, Echer, Ezequiel, Franco, Adriane Marques de Souza & Bolzan, Mauricio José Alves, 2023, Advances in Space Research, 72, 1208
6	Seasonal dependence of the Earth's radiation belt ─ new insights Hajra, Rajkumar, 2021, Annales Geophysicae, 39, 181
6	Comment on "First Observation of Mesosphere Response to the Solar Wind High-Speed Streams" by W. Yi et al. Tsurutani, Bruce T., Hajra, Rajkumar, Echer, Ezequiel & Lakhina, Gurbax S., 2019, Journal of Geophysical Research (Space Physics), 124, 8165
6	Solar control of ambient ionization of the ionosphere near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2007, Bulletin of the Astronomical Society of India, 35, 599
6	Predicting Interplanetary Shock Occurrence for Solar Cycle 25: Opportunities and Challenges in Space Weather Research Oliveira, Denny M., Allen, Robert C., Alves, Livia R., Blake, Séan P., Carter, Brett A., Chakrabarty, Dibyendu, D'Angelo, Giulia, Delano, Kevin, Echer, Ezequiel, Ferradas, Cristian P., Finley, Matt G., Gallardo-Lacourt, Bea, Gershman, Dan, Gjerloev, Jesper W., Habarulema, John Bosco, Hartinger, Michael D., Hajra, Rajkumar, Hayakawa, Hisashi, Juusola, Liisa, Laundal, Karl M., Leamon, Robert J., Madelaire, Michael, Martínez-Ledesma, Miguel, McIntosh, Scott M., Miyoshi, Yoshizumi, Moldwin, Mark B., Nahayo, Emmanuel, Nandy, Dibyendu, Nilam, Bhosale, Nykyri, Katariina, Paterson, William R., Piersanti, Mirko, Pietropaolo, Ermanno, Rodger, Craig J., Shah, Trunali, Smith, Andy W., Srivastava, Nandita, Tsurutani, Bruce T., Ram, S. Tulasi, Upton, Lisa A., Veenadhari, Bhaskara, Vidal-Luengo, Sergio, Viljanen, Ari, Vines, Sarah K., Yadav, Vipin K., Yee, Jeng-Hwa, Weygand, James W. & Zesta, Eftyhia, 2024, Space Weather, 22, e2024SW003964
6	Comments on "New Insights From the 2003 Halloween Storm Into the Colaba 1600 nT Magnetic Depression During the 1859 Carrington Storm" by S. Ohtani (2022) Tsurutani, Bruce T., Lakhina, Gurbax S. & Hajra, Rajkumar, 2023, Journal of Geophysical Research (Space Physics), 128, e2022JA031034
6	Cometary plasma science Goetz, C., Gunell, H., Volwerk, M., Beth, A., Eriksson, A., Galand, M., Henri, P., Nilsson, H., Wedlund, C. Simon, Alho, M., Andersson, L., Andre, N., De Keyser, J., Deca, J., Ge, Y., Glassmeier, K.-H., Hajra, R., Karlsson, T., Kasahara, S., Kolmasova, I., LLera, K., Madanian, H., Mann, I., Mazelle, C., Odelstad, E., Plaschke, F., Rubin, M., Sanchez-Cano, B., Snodgrass, C. & Vigren, E., 2022, Experimental Astronomy, 54, 1129
5	Solar-Wind High-Speed Stream (HSS) Alfvén Wave Fluctuations at High Heliospheric Latitudes: Ulysses Observations During Two Solar-Cycle Minima Echer, Ezequiel, Franco, Adriane Marques de Souza, da Costa Junior, Edio, Hajra, Rajkumar & Bolzan, Mauricio José Alves, 2022, Solar Physics, 297, 143
5	A comparative study on geoeffective and non-geoeffective corotating interaction regions Sunny, Jibin V., Nair, Archana Giri, Babu, Megha & Hajra, Rajkumar, 2023, Advances in Space Research, 71, 268
5	Geomagnetic Activity Following Interplanetary Shocks in Solar Cycles 23 and 24 Echer, Ezequiel, Lucas, Aline de, Hajra, Rajkumar, Franco, Adriane Marques de Souza, Bolzan, Mauricio J. A. & Nascimento, Luis Eduardo Sales do, 2023, Brazilian Journal of Physics, 53, 79
5	Solar flares observed by Rosetta at comet 67P/Churyumov-Gerasimenko Edberg, N. J. T., Johansson, F. L., Eriksson, A. I., Andrews, D. J., Hajra, R., Henri, P., Simon Wedlund, C., Alho, M. & Thiemann, E., 2019, A&A, 630, A49
5	Near-Earth High-Speed and Slow Solar Winds: A Statistical Study on Their Characteristics and Geomagnetic Impacts Hajra, Rajkumar, 2023, Solar Physics, 298, 53
4	Ionospheric effects near the magnetic equator and the anomaly crest of the Indian longitude zone during a large number of intense geomagnetic storms Hajra, R., Chakraborty, S. K. & Dasgupta, A., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 1299
4	Three-Dimensional Global Hybrid Simulations of Plasma Transport and Energy Conversion During Solar Wind-Magnetosphere Interactions Lu, San, Guo, Jin, Lu, Quanming, Shu, Yukang, Ren, Junyi, Wang, Rongsheng & Hajra, Rajkumar, 2025, Geophysical Research Letters, 52, e2025GL117084
4	Equatorial ionospheric responses in relation to the occurrence of main phase of intense geomagnetic storms in the local dusk sector Hajra, R. & Chakraborty, S. K., 2011, Journal of Atmospheric and Solar-Terrestrial Physics, 73, 760
3	Ionospheric total electron content of comet 67P/Churyumov-Gerasimenko Hajra, Rajkumar, Henri, Pierre, Vallières, Xavier, Galand, Marina, Rubin, Martin, Tsurutani, Bruce T., Gilet, Nicolas, Bucciantini, Luca & Nemeth, Zoltan, 2020, A&A, 635, A51
3	Comparison of geophysical patterns in the southern hemisphere mid-latitude region Da Silva, L. A., Satyamurty, P., Alves, L. R., Souza, V. M., Jauer, P. R., Silveira, M. V. D., Echer, M. S., Hajra, R., Medeiros, C., Marchezi, J. P., Rockenbach, M., Rigozo, N. R., Denardini, C. M., Mendes, O., Dal Lago, A. & Vieira, L. E. A., 2016, Advances in Space Research, 58, 2090
3	Geoelectric fields and geomagnetically induced currents during the April 23─24, 2023 geomagnetic storm Wawrzaszek, Anna, Hajra, Rajkumar, Gil, Agnieszka, Modzelewska, Renata, Tsurutani, Bruce Tsatnam & Wawrzaszek, Roman, 2024, Scientific Reports, 14, 25074
3	Plasma distribution around Comet 67P in the last month of the Rosetta mission Nemeth, Z., Timar, A., Szego, K., Henri, P., Hajra, R. & Wattieaux, G., 2020, Icarus, 350, 113924
2	Extremely Slow (V sw < 300 km s-1) Solar Winds (ESSWs) at 1 au: Causes of Extreme Geomagnetic Quiet at Earth Tsurutani, Bruce T. & Hajra, Rajkumar, 2022, ApJ, 936, 155
2	The Shock-Substorm of 24 September 1998: A Different Type of Substorm Trigger Onset Tsurutani, Bruce T., Hajra, Rajkumar, Ebihara, Yusuke, Lakhina, Gurbax S., Narita, Yasuhito & Glassmeier, Karl-Heinz, 2025, Geophysical Research Letters, 52, e2025GL115509
2	Identification of the planetary magnetosphere boundaries with the wavelet multi-resolution analysis Bolzan, Mauricio José Alves, Echer, Ezequiel, de Souza Franco, Adriane Marques & Hajra, Rajkumar, 2022, Journal of Atmospheric and Solar-Terrestrial Physics, 230, 105842
2	The Interplanetary and Magnetospheric causes of Geomagnetically Induced Currents (GICs) > 10 A in the Mäntsälä Finland Pipeline: 1999 through 2019 - Erratum Tsurutani, Bruce T. & Hajra, Rajkumar, 2021, Journal of Space Weather and Space Climate, 11, 32
2	Solar Cycle and Seasonal Dependences of Field-Aligned Currents Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Du, Aimin, Lu, San & Echer, Ezequiel, 2025, Space Weather, 23, e2025SW004441
2	Supersubstorms during the May 2024 superstorm Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Du, Aimin & Lakhina, Gurbax S., 2025, Journal of Space Weather and Space Climate, 15, 51
1	Prompt Disappearance of Magnetospheric Chorus Waves Caused by High-Speed Magnetosheath Jets Zhou, Xuan, Gao, Xinliang, Lu, Quanming, Hajra, Rajkumar, Ke, Yangguang, Chen, Rui & Ma, Jiuqi, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032576
1	Revisiting the Superstorm on 6─7 April 2000 Caused by an Extraordinary Corotating Interaction Region (With an Embedded Coronal Jet?) Tsurutani, Bruce T., Hajra, Rajkumar, Lakhina, Gurbax & Meng, Xing, 2024, Journal of Geophysical Research (Space Physics), 129, 2024JA032989
1	Dawn-Dusk Morphology of Auroral Arcs in Substorm Growth Phase Liu, Zepeng, Lu, San, Nishimura, Y., Lu, Quanming, Wang, Boyi, Ma, Yuzhang, Zhang, Zhibo, Wang, Rongsheng, Hajra, Rajkumar, Apatenkov, S., Grigorenko, E., Artemyev, A. V. & Angelopoulos, V., 2025, Journal of Geophysical Research (Space Physics), 130, e2025JA033860
1	Extreme Rarefaction of Solar Wind: A Study on Origin and Characteristics Using Ulysses Observations Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Shan, Lican, Du, Aimin, Wang, Rongsheng, Lu, San & Gao, Xinliang, 2023, ApJ, 955, 120
1	Magnetic decrease rates and their relationship with solar wind parameters of high-heliographic latitude high-speed streams during solar minima: Ulysses observations Echer, E., Franco, A. M. S., da Costa, E., Hajra, R. & Bolzan, M. J. A., 2025, Advances in Space Research, 75, 6500
0	Study of Neptune dayside magnetosheath fluctuations during Voyager-2 flyby Echer, Ezequiel, de Souza Franco, Adriane Marques, Magalhães, Fabíola Pinho, Bolzan, Mauricio J. A. & Hajra, Rajkumar, 2023, Advances in Space Research, 71, 3468
0	Electromagnetic Pulsations Lakhina, Gurbax S., Tsurutani, Bruce T. & Hajra, Rajkumar, 2025, Journal of the Geological Society of India, 101, 896
0	Field-Aligned Currents During High-Intensity Long-Duration Continuous Auroral Electrojet Activity Events: Seasonal Dependences Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming & Du, Aimin, 2025, Space Weather, 23, e2025SW004354
0	Norad Tracking Of The 2022 February Starlink Satellites And The Immediate Loss Of 32 Satellites Guarnieri, Fernando L., Tsurutani, Bruce T., Hajra, Rajkumar, Echer, Ezequiel & Lakhina, Gurbax S., 2025, Nonlinear Processes in Geophysics, 32, 75
0	Three-dimensional Global Hybrid Simulation of Magnetosheath Jets at Mercury Guo, Jin, Lu, San, Lu, Quanming, Ren, Junyi, Ma, Jiuqi, Slavin, James A., Sun, Weijie, Zhong, Jun, Gao, Xinliang, Hajra, Rajkumar & Wang, Rongsheng, 2025, ApJ, 978, L9
0	Field-Aligned Currents During High-Intensity Long-Duration Continuous Auroral Electrojet Activity Events: A Statistical Study Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Du, Aimin, Lu, San & Gao, Xinliang, 2025, Space Weather, 23, e2025SW004353
0	Response of Electric Field Pulse and Particle Dynamics in Earth's Magnetosphere to Enhanced Solar Wind Dynamic Pressure With Varied IMF Directions: A Statistical Study Zhou, Xuan, Gao, Xinliang, Lu, Quanming, Hajra, Rajkumar & Ma, Jiuqi, 2025, Journal of Geophysical Research (Space Physics), 130, e2024JA033701