Effects of the May 2024 Solar Storm on the Earth’s Radiation Belts Observed by CALET on the International Space Station

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dc.contributor.authorFicklin, A W
dc.contributor.authorBruno, A
dc.contributor.authorBlum, L
dc.contributor.authorCannady, N
dc.contributor.authorGuzik, T G
dc.contributor.authorHams, Thomas
dc.contributor.authorCALET Collaboration
dc.contributor.authoret al.
dc.date.accessioned2025-10-29T19:15:18Z
dc.date.issued2024-09-24
dc.description39th International Cosmic Ray Conference (ICRC2025), July 15–24 2025,Geneva, Switzerland
dc.descriptionAuthors list: CALET Collaboration, O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, P. Betti, G. Bigongiari, W.R. Binns, M. Bongi, P. Brogi, A. Bruno, N. Cannady, G. Castellini, C. Checchia, M.L. Cherry, G. Collazuol, G.A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T.G. Guzik, T. Hams, K. Hibino, M. Ichimura, M.H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H.S. Krawczynski, J.F. Krizmanic, P. Maestro, P.S. Marrocchesi, M. Mattiazzi, A.M. Messineo, J.W. Mitchell, S. Miyake, A.A. Moiseev, M. Mori, N. Mori, H.M. Motz, K. Munakata, S. Nakahira, J. Nishimura, M. Negro, S. Okuno, J.F. Ormes, S. Ozawa, L. Pacini, P. Papini, B.F. Rauch, S.B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J.P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
dc.description.abstractThe Calorimetric Electron Telescope (CALET), launched to the International Space Station in2015, provides more than 9 years of continuous observation of the radiation environment at lowEarth orbit. Using this dataset, we present 5 months of observations following the May 2024 solar storms and the effects they had on the radiation belts across three electron energy ranges (>1.5, >3.4, and >8.2MeV).We show that this event populated a long-lasting new structure of relativistic electrons extending to values of L shell below the slot region barrier of L = 2.8. Additionally, we observe the decay rates for this population as a function of energy and L shell to show the evolution of this structure over time.
dc.description.sponsorshipWe gratefully acknowledge JAXA’s contributions to the development of CALET and to the operations aboard the JEM-EF on the ISS. This work was supported in part by JSPS Grant-in-Aid for Scientific Research (S) No. 26220708, No. 19H05608, and No. 24H00025, JSPS Grant-in Aid for Scientific Research (B) No. 24K00665, and by the MEXT Supported Program for the Strategic Research Foundation at Private Universities (2011-2015) (No. S1101021) at Waseda University. The CALET effort in Italy is supported by ASI under Agreement No. 2013-018-R.0 and its amendments. The CALET effort in the United States is supported by NASA through Grants No. NNX16AB99G, No. NNX16AC02G, and No. NNH14ZDA001N-APRA-0075.
dc.description.urihttps://pos.sissa.it/501/1293/
dc.format.extent8 pages
dc.genreconference papers and proceedings
dc.genrepreprints
dc.identifierdoi:10.13016/m216sf-1il3
dc.identifier.urihttps://doi.org/10.22323/1.501.1293
dc.identifier.urihttp://hdl.handle.net/11603/40745
dc.language.isoen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.titleEffects of the May 2024 Solar Storm on the Earth’s Radiation Belts Observed by CALET on the International Space Station
dc.typeText

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