Publications of Fernando L. Guarnieri

A list of publications authored or co-authored by Fernando L. Guarnieri, derived from the SAO/NASA Astrophysics Data System (ADS). The number in brackets after each title indicates the number of citations that the paper has received.

Orcid ID: 0009-0007-2353-2594

List of publications ordered by citations
Number of papers: 64 (refereed: 60)
No. of citations: 3131
First author papers: 4 (refereed: 4)

2025

  1. Assessment of Daytime Sky Quality and Atmospheric Refractive Index ( Cn2 ) Analysis at Pico dos Dias Observatory [1]
    Cuadros, Edith T., Almeida, Adriano P., Carlesso, Franciele, Pareja-Quispe, David, Guarnieri, Fernando L., Dal Lago, Alisson, Gargaglioni, Saulo R. & Vieira, Luis E. A., ApJS, 281, 24

2023

  1. The Fibre Resolved OpticAl and Near-Ultraviolet Czerny-Turner Imaging Spectropolarimeter (FRANCIS) [2]
    Jess, David B., Grant, Samuel D. T., Bate, William, Liu, Jiajia, Jafarzadeh, Shahin, Keys, Peter H., Vieira, Luís E. A., Dal Lago, Alisson, Guarnieri, Fernando L., Christian, Damian J., Gilliam, Doug & Banerjee, Dipankar, Solar Physics, 298, 146

2018

  1. A correlation study regarding the AE index and ACE solar wind data for Alfvénic intervals using wavelet decomposition and reconstruction [20]
    Guarnieri, Fernando L., Tsurutani, Bruce T., Vieira, Luis E. A., Hajra, Rajkumar, Echer, Ezequiel, Mannucci, Anthony J. & Gonzalez, Walter D., Nonlinear Processes in Geophysics, 25, 67

2017

  1. Preliminary Design of the Brazilian's National Institute for Space Research Broadband Radiometer for Solar Observations [2]
    Berni, L. A., Vieira, L. E. A., Savonov, G. S., Dal Lago, A., Mendes, O., Silva, M. R., Guarnieri, F., Sampaio, M., Barbosa, M. J., Vilas Boas, J. V., Branco, R. H. F., Nishimori, M., Silva, L. A., Carlesso, F., Rodríguez Gómez, J. M., Alves, L. R., Vaz Castilho, B., Santos, J., Silva Paula, A. & Cardoso, F., Living Around Active Stars (Editors: Nandy, D., Valio, A. & Petit, P.), IAU Symposium, 328, p. 224

2015

  1. Preliminary design of the INPE's Solar Vector Magnetograph [2]
    Vieira, L. E. A., de Gonzalez, A. L. Clúa, Lago, A. Dal, Wrasse, C., Echer, E., Guarnieri, F. L., Cardoso, F. Reis, Guerrero, G., Costa, J. Rezende, Palacios, J., Balmaceda, L., Alves, L. Ribeiro, da Silva, L., Costa, L. L., Sampaio, M., Soares, M. C. Rabello, Barbosa, M., Domingues, M., Rigozo, N., Mendes, O., Jauer, P., Dallaqua, R., Branco, R. H., Stekel, T., Gonzalez, W. & Kabata, W., Polarimetry (Editors: Nagendra, K. N., Bagnulo, Stefano, Centeno, Rebecca & Jes\'us Martinez González, Maria.), IAU Symposium, 305, p. 195

2014

  1. Imprint of Climate Variability on Mesozoic Fossil Tree Rings: Evidences of Solar Activity Signals on Environmental Records Around 200 Million Years Ago? [3]
    Prestes, A., Rigozo, N. R., Nordemann, D. J. R., Echer, E., Vieira, L. E. A., Souza Echer, M. P., Wrasse, C. M. & Guarnieri, F. L., Pure and Applied Geophysics, 171, 1983

2012

  1. Ionospheric response of equatorial and low latitude F-region during the intense geomagnetic storm on 24-25 August 2005 [22]
    de Jesus, R., Sahai, Y., Guarnieri, F. L., Fagundes, P. R., de Abreu, A. J., Bittencourt, J. A., Nagatsuma, T., Huang, C.-S., Lan, H. T. & Pillat, V. G., Advances in Space Research, 49, 518

2011

  1. Dependence of the F-region peak electron density (foF2) on solar activity observed in the equatorial ionospheric anomaly region in the Brazilian sector [4]
    Cardoso, F. A., Sahai, Y., Guarnieri, F. L., Fagundes, P. R., Pillat, V. G. & da Silva, J. V. P. R., Advances in Space Research, 48, 837
  2. Interplanetary fast forward shocks and their geomagnetic effects: CAWSES events [26]
    Echer, E., Tsurutani, B. T., Guarnieri, F. L. & Kozyra, J. U., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 1330
  3. The response of the polar cusp to a high-speed solar wind stream studied by a multispacecraft wavelet analysis [7]
    Korth, A., Echer, E., Zong, Q.-G., Guarnieri, F. L., Fraenz, M. & Mouikis, C. G., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 52
  4. Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21-22 January 2005 [27]
    Sahai, Y., Fagundes, P. R., de Jesus, R., de Abreu, A. J., Crowley, G., Kikuchi, T., Huang, C.-S., Pillat, V. G., Guarnieri, F. L., Abalde, J. R. & Bittencourt, J. A., Annales Geophysicae, 29, 919
  5. Mirror Modes in the Heliosheath [0]
    Tsurutani, B. T., Guarnieri, F. L., Echer, E. E., Lakhina, G. S. & Verkhoglyadova, O. P., American Institute of Physics Conference Series (Editors: Vassiliadis, Dimitris, Fung, Shing F., Shao, Xi, Daglis, Ioannis A. & Huba, Joseph D.), American Institute of Physics Conference Series, 1320, p. 111
  6. Corrigendum to “A review of interplanetary discontinuities and their geomagnetic effects” by Tsurutani et al., JASTP, 73 (2011) 5-19 [1]
    Tsurutani, B. T., Lakhina, G. S., Verkhoglyadova, O. P., Gonzalez, W. D., Echer, E. & Guarnieri, F. L., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 709
  7. A review of interplanetary discontinuities and their geomagnetic effects [135]
    Tsurutani, B. T., Lakhina, G. S., Verkhoglyadova, O. P., Gonzalez, W. D., Echer, E. & Guarnieri, F. L., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 5
  8. The properties of two solar wind high speed streams and related geomagnetic activity during the declining phase of solar cycle 23 [48]
    Tsurutani, Bruce T., Echer, Ezequiel, Guarnieri, Fernando L. & Gonzalez, Walter D., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 164
  9. Mirror instability upstream of the termination shock (TS) and in the heliosheath [24]
    Tsurutani, Bruce T., Echer, Ezequiel, Verkhoglyadova, Olga P., Lakhina, Gurbax S. & Guarnieri, F. L., Journal of Atmospheric and Solar-Terrestrial Physics, 73, 1398
  10. Magnetosheath and heliosheath mirror mode structures, interplanetary magnetic decreases, and linear magnetic decreases: Differences and distinguishing features [146]
    Tsurutani, Bruce T., Lakhina, Gurbax S., Verkhoglyadova, Olga P., Echer, Ezequiel, Guarnieri, Fernando L., Narita, Yasuhito & Constantinescu, Dragos O., Journal of Geophysical Research (Space Physics), 116, A02103
  11. F-region ionospheric parameters observed in the equatorial and low latitude regions during medium solar activity in the Brazilian sector and comparison with the IRI-2007 model results [19]
    de Jesus, R., Sahai, Y., Guarnieri, F. L., Fagundes, P. R., de Abreu, A. J., Pillat, V. G. & Lima, W. L. C., Advances in Space Research, 47, 718

2010

  1. Interplanetary origins of November 2004 superstorms [18]
    Echer, E., Tsurutani, B. T. & Guarnieri, F. L., Journal of Atmospheric and Solar-Terrestrial Physics, 72, 280
  2. Forward and reverse CIR shocks at 4-5 AU: Ulysses [17]
    Echer, E., Tsurutani, B. T. & Guarnieri, F. L., Advances in Space Research, 45, 798
  3. Magnetic Decreases (MDs) and mirror modes: two different plasma β changing mechanisms [11]
    Tsurutani, B. T., Lakhina, G. S., Verkhoglyadova, O. P., Echer, E. & Guarnieri, F. L., Nonlinear Processes in Geophysics, 17, 467
  4. Response of the ionospheric F-region in the Brazilian sector during the super geomagnetic storm in April 2000 observed by GPS [32]
    de Abreu, A. J., Sahai, Y., Fagundes, P. R., Becker-Guedes, F., de Jesus, R., Guarnieri, F. L. & Pillat, V. G., Advances in Space Research, 45, 1322
  5. Effects observed in the ionospheric F-region in the South American sector during the intense geomagnetic storm of 14 December 2006 [32]
    de Jesus, R., Sahai, Y., Guarnieri, F. L., Fagundes, P. R., de Abreu, A. J., Becker-Guedes, F., Brunini, C., Gende, M., Cintra, T. M. F., de Souza, V. A., Pillat, V. G. & Lima, W. L. C., Advances in Space Research, 46, 909

2009

  1. Solar and interplanetary origins of the November 2004 superstorms [9]
    Echer, Ezequiel, Tsurutani, Bruce T. & Guarnieri, Fernando L., Advances in Space Research, 44, 615
  2. The interplanetary magnetic decrease automatic detection (IMDAD) code [4]
    Guarnieri, F. L., Tsurutani, B. T. & Echer, E., Earth, Planets and Space, 61, 585
  3. Effects observed in the Latin American sector ionospheric F region during the intense geomagnetic disturbances in the early part of November 2004 [25]
    Sahai, Y., Becker-Guedes, F., Fagundes, P. R., de Jesus, R., de Abreu, A. J., Paxton, L. J., Goncharenko, L. P., Brunini, C., Gende, M., Ferreira, A. S., Lima, N. S., Guarnieri, F. L., Pillat, V. G., Bittencourt, J. A. & Candido, C. M. N., Journal of Geophysical Research (Space Physics), 114, A00A19
  4. Effects observed in the ionospheric F region in the east Asian sector during the intense geomagnetic disturbances in the early part of November 2004 [31]
    Sahai, Y., Becker-Guedes, F., Fagundes, P. R., de Jesus, R., de Abreu, A. J., Otsuka, Y., Shiokawa, K., Igarashi, K., Yumoto, K., Huang, C.-S., Lan, H. T., Saito, A., Guarnieri, F. L., Pillat, V. G. & Bittencourt, J. A., Journal of Geophysical Research (Space Physics), 114, A00A18
  5. Magnetic decrease formation from <1 AU to ∼5 AU: Corotating interaction region reverse shocks [22]
    Tsurutani, Bruce T., Guarnieri, Fernando L., Echer, Ezequiel, Lakhina, Gurbax S. & Verkhoglyadova, Olga P., Journal of Geophysical Research (Space Physics), 114, A08105

2008

  1. Cluster observations of O+ escape in the magnetotail due to shock compression effects during the initial phase of the magnetic storm on 17 August 2001 [18]
    Echer, E., Korth, A., Zong, Q.-G., Fraünz, M., Gonzalez, W. D., Guarnieri, F. L., Fu, S. Y. & Reme, H., Journal of Geophysical Research (Space Physics), 113, A05209
  2. Nighttime ionosphere thermosphere coupling observed during an intense geomagnetic storm [9]
    Fagundes, P. R., Muella, M. T. A. H., Bittencourt, J. A., Sahai, Y., Lima, W. L. C., Guarnieri, F. L., Becker-Guedes, F., Pillat, V. G., Ferreira, A. S. & Lima, N. S., Advances in Space Research, 41, 539
  3. CAWSES November 7-8, 2004, superstorm: Complex solar and interplanetary features in the post-solar maximum phase [51]
    Tsurutani, Bruce T., Echer, Ezequiel, Guarnieri, Fernando L. & Kozyra, J. U., Geophysical Research Letters, 35, L06S05
  4. Interplanetary causes of middle latitude ionospheric disturbances [3]
    Tsurutani, Bruce T., Echer, Ezequiel, Guarnieri, Fernando L. & Verkhoglyadova, Olga P., Geophysical Monograph Series, 181, 99
  5. Are changes of the geomagnetic field intensity related to changes of the tropical Pacific sea-level pressure during the last 50 years? [4]
    Vieira, Luis Eduardo Antunes, da Silva, Ligia Alves & Guarnieri, Fernando LuíS., Journal of Geophysical Research (Space Physics), 113, A08226

2007

  1. Solar activity imprints in tree ring width from Chile (1610 1991) [11]
    Rigozo, N. R., Nordemann, D. J. R., Souza Echer, M. P., Echer, E., da Silva, H. E., Prestes, A. & Guarnieri, F. L., Journal of Atmospheric and Solar-Terrestrial Physics, 69, 1049
  2. Unusual ionospheric effects observed during the intense 28 October 2003 solar flare in the Brazilian sector [26]
    Sahai, Y., Becker-Guedes, F., Fagundes, P. R., Lima, W. L. C., de Abreu, A. J., Guarnieri, F. L., Candido, C. M. N. & Pillat, V. G., Annales Geophysicae, 25, 2497
  3. Comment on ``Comment on the abundances of rotational and tangential discontinuities in the solar wind'' by M. Neugebauer [17]
    Tsurutani, Bruce T., Lakhina, Gurbax S., Verkhoglyadova, Olga P., Echer, Ezequiel & Guarnieri, Fernando L., Journal of Geophysical Research (Space Physics), 112, A03101
  4. Muon and neutron observations in connection with the corotating interaction regions [2]
    da Silva, M. R., Dal Lago, A., Echer, E., de Lucas, A., Gonzalez, W. D., Schuch, N. J., Munakata, K., Vieira, L. E. A. & Guarnieri, F. L., Advances in Space Research, 40, 348
  5. Energy balance during intense and super-intense magnetic storms using an Akasofu ɛ parameter corrected by the solar wind dynamic pressure [12]
    de Lucas, A., Gonzalez, W. D., Echer, E., Guarnieri, F. L., Dal Lago, A., da Silva, M. R., Vieira, L. E. A. & Schuch, N. J., Journal of Atmospheric and Solar-Terrestrial Physics, 69, 1851

2006

  1. The 17-22 October (1999) solar-interplanetary-geomagnetic event: Very intense geomagnetic storm associated with a pressure balance between interplanetary coronal mass ejection and a high-speed stream [25]
    Dal Lago, Alisson, Gonzalez, Walter D., Balmaceda, Laura A., Vieira, Luis E. A., Echer, Ezequiel, Guarnieri, Fernando L., Santos, Jean, da Silva, Marlos R., de Lucas, Aline, Clua de Gonzalez, Alicia L., Schwenn, Ranier & Schuch, Nelson J., Journal of Geophysical Research (Space Physics), 111, A07S14
  2. Magnetospheric Energetics During HILDCAAs [21]
    Gonzalez, W. D., Guarnieri, F. L., Clua-Gonzalez, A. L., Echer, E., Alves, M. V., Ogino, T. & Tsurutani, B. T., Recurrent Magnetic Storms: Corotating Solar Wind (Editors: McPherron, Robert, Gonzalez, Walter, Lu, Gang, José, H. A. & Natchimuthukonar Gopalswamy,, Sobral), 167, p. 175
  3. The Nature of Auroras During High-Intensity Long-Duration Continuous AE Activity (HILDCAA) Events: 1998 to 2001 [34]
    Guarnieri, F. L., Recurrent Magnetic Storms: Corotating Solar Wind (Editors: McPherron, Robert, Gonzalez, Walter, Lu, Gang, José, H. A. & Natchimuthukonar Gopalswamy,, Sobral), 167, p. 235
  4. Equatorial ionospheric responses to high-intensity long-duration auroral electrojet activity (HILDCAA) [22]
    Sobral, José Humberto A., Abdu, Mangalathayil A., Gonzalez, Walter D., Gonzalez, Alicia C., Tsurutani, Bruce T., da Silva, Renato R. L., Barbosa, Isabela G., Arruda, Daniela C. S., Denardini, Clezio M., Zamlutti, Carlos J. & Guarnieri, Fernando, Journal of Geophysical Research (Space Physics), 111, A07S02
  5. The extreme Halloween 2003 solar flares (and Bastille Day, 2000 Flare), ICMEs, and resultant extreme ionospheric effects: A review [27]
    Tsurutani, B. T., Mannucci, A. J., Iijima, B., Guarnieri, F. L., Gonzalez, W. D., Judge, D. L., Gangopadhyay, P. & Pap, J., Advances in Space Research, 37, 1583
  6. Dayside Ionospheric (GPS) Response to Corotating Solar Wind Streams [17]
    Tsurutani, B. T., Mannucci, A. J., Iijima, B. A., Komjathy, A., Saito, A., Tsuda, T., Verkhoglyadova, O. P., Gonzalez, W. D. & Guarnieri, F. L., Recurrent Magnetic Storms: Corotating Solar Wind (Editors: McPherron, Robert, Gonzalez, Walter, Lu, Gang, José, H. A. & Natchimuthukonar Gopalswamy,, Sobral), 167, p. 245
  7. Extreme solar EUV flares and ICMEs and resultant extreme ionospheric effects: Comparison of the Halloween 2003 and the Bastille Day events [15]
    Tsurutani, B. T., Guarnieri, F. L., Fuller-Rowell, T., Mannucci, A. J., Iijima, B., Gonzalez, W. D., Judge, D. L., Gangopadhyay, P., Saito, A., Tsuda, T., Verkhoglyadova, O. P. & Zambon, G. A., Radio Science, 41, RS5S07
  8. Magnetic Storms Caused by Corotating Solar Wind Streams [53]
    Tsurutani, Bruce T., McPherron, Robert L., Gonzalez, Walter D., Lu, Gang, Gopalswamy, Nat & Guarnieri, Fernando L., Recurrent Magnetic Storms: Corotating Solar Wind (Editors: McPherron, Robert, Gonzalez, Walter, Lu, Gang, José, H. A. & Natchimuthukonar Gopalswamy,, Sobral), 167, p. 1
  9. Corotating solar wind streams and recurrent geomagnetic activity: A review [540]
    Tsurutani, Bruce T., Gonzalez, Walter D., Gonzalez, Alicia L. C., Guarnieri, Fernando L., Gopalswamy, Nat, Grande, Manuel, Kamide, Yohsuke, Kasahara, Yoshiya, Lu, Gang, Mann, Ian, McPherron, Robert, Soraas, Finn & Vasyliunas, Vytenis, Journal of Geophysical Research (Space Physics), 111, A07S01

2005

  1. Interplanetary shocks and geomagnetic activity during solar maximum (2000) and solar minimum (1995-1996) [2]
    Echer, E., Gonzalez, W. D., Lago, A. Dal, Vieira, L. E. A., Guarnieri, F. L., Gonzalez, A. L. C. & Schuch, N. J., Advances in Space Research, 36, 2318
  2. Interplanetary shocks and sudden impulses during solar maximum (2000) and solar minimum (1995-1996) [10]
    Echer, E., Gonzalez, W. D., Dal Lago, A., Vieira, L. E. A., Guarnieri, F. L., Gonzalez, A. L. C. & Schuch, N. J., Advances in Space Research, 36, 2313
  3. Introduction to space weather [72]
    Echer, E., Gonzalez, W. D., Guarnieri, F. L., Lago, A. Dal & Vieira, L. E. A., Advances in Space Research, 35, 855
  4. Reply to comments on the paper “Long term correlation between solar and geomagnetic activity” [0]
    Echer, E., Gonzalez, W. D., Gonzalez, A. L. C., Prestes, A., Vieira, L. E. A., dal Lago, A., Guarnieri, F. L. & Schuch, N. J., Journal of Atmospheric and Solar-Terrestrial Physics, 67, 1375
  5. Dayside global ionospheric response to the major interplanetary events of October 29-30, 2003 ``Halloween Storms'' [467]
    Mannucci, A. J., Tsurutani, B. T., Iijima, B. A., Komjathy, A., Saito, A., Gonzalez, W. D., Guarnieri, F. L., Kozyra, J. U. & Skoug, R., Geophysical Research Letters, 32, L12S02
  6. The October 28, 2003 extreme EUV solar flare and resultant extreme ionospheric effects: Comparison to other Halloween events and the Bastille Day event [197]
    Tsurutani, B. T., Judge, D. L., Guarnieri, F. L., Gangopadhyay, P., Jones, A. R., Nuttall, J., Zambon, G. A., Didkovsky, L., Mannucci, A. J., Iijima, B., Meier, R. R., Immel, T. J., Woods, T. N., Prasad, S., Floyd, L., Huba, J., Solomon, S. C., Straus, P. & Viereck, R., Geophysical Research Letters, 32, L03S09
  7. Nonlinear Alfvén waves, discontinuities, proton perpendicular acceleration, and magnetic holes/decreases in interplanetary space and the magnetosphere: intermediate shocks? [92]
    Tsurutani, B. T., Lakhina, G. S., Pickett, J. S., Guarnieri, F. L., Lin, N. & Goldstein, B. E., Nonlinear Processes in Geophysics, 12, 321
  8. Rapid evolution of magnetic decreases (MDs) and discontinuities in the solar wind: ACE and Cluster [31]
    Tsurutani, Bruce T., Guarnieri, Fernando L., Lakhina, Gurbax S. & Hada, Tohru, Geophysical Research Letters, 32, L10103

2004

  1. Comparison Between Halo cme Expansion Speeds Observed on the Sun, the Related Shock Transit Speeds to Earth and Corresponding Ejecta Speeds at 1 au [23]
    Dal Lago, A., Vieira, L. E. A., Echer, E., Gonzalez, W. D., de Gonzalez, A. L. C., Guarnieri, F. L., Schuch, N. J. & Schwenn, R., Solar Physics, 222, 323
  2. Long-term correlation between solar and geomagnetic activity [73]
    Echer, E., Gonzalez, W. D., Gonzalez, A. L. C., Prestes, A., Vieira, L. E. A., dal Lago, A., Guarnieri, F. L. & Schuch, N. J., Journal of Atmospheric and Solar-Terrestrial Physics, 66, 1019
  3. Vertical ozone and temperature distributions above Santa Maria, Brazil (1996-1998) [2]
    Guarnieri, F. L., Echer, E., Pinheiro, D. K. & Schuch, N. J., Advances in Space Research, 34, 759
  4. A study of the anticorrelations between ozone and UV-B radiation using linear and exponential fits in southern Brazil [19]
    Guarnieri, R. A., Padilha, L. F., Guarnieri, F. L., Echer, E., Makita, K., Pinheiro, D. K., Schuch, A. M. P., Boeira, L. S. & Schuch, N. J., Advances in Space Research, 34, 764
  5. Global dayside ionospheric uplift and enhancement associated with interplanetary electric fields [406]
    Tsurutani, Bruce, Mannucci, Anthony, Iijima, Byron, Abdu, Mangalathayil Ali, Sobral, Jose Humberto A., Gonzalez, Walter, Guarnieri, Fernando, Tsuda, Toshitaka, Saito, Akinori, Yumoto, Kiyohumi, Fejer, Bela, Fuller-Rowell, Timothy J., Kozyra, Janet, Foster, John C., Coster, Anthea & Vasyliunas, Vytenis M., Journal of Geophysical Research (Space Physics), 109, A08302
  6. Are high-intensity long-duration continuous AE activity (HILDCAA) events substorm expansion events? [101]
    Tsurutani, Bruce T., Gonzalez, Walter D., Guarnieri, Fernando, Kamide, Yosuke, Zhou, Xiaoyan & Arballo, John K., Journal of Atmospheric and Solar-Terrestrial Physics, 66, 167

2003

  1. Interplanetary shock parameters during solar activity maximum (2000) and minimum (1995-1996) [32]
    Echer, E., Gonzalez, W. D., Vieira, L. E. A., Dal Lago, A., Guarnieri, F. L., Prestes, A., Gonzalez, A. L. C. & Schuch, N. J., Brazilian Journal of Physics, 33, 115
  2. Multi-Scale Analysis of the Geomagnetic Symmetric Index (sym) [1]
    Vieira, L. E. A., Gonzalez, W. D., Echer, E., Guarnieri, F. L., Prestes, A., Gonzalez, A. L. C., Santos, J. C., Dal Lago, A. & Schuch, N. J., Solar Physics, 217, 383

2002

  1. Missing ozone at high altitude: Comparison of in situ and satellite data [6]
    Kirchhoff, V. W. J. H. & Guarnieri, F. L., Journal of Geophysical Research (Atmospheres), 107, 4109

Created on Wed Apr 22 04:37:37 2026.