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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ICRC2025_1293.pdf (2.82 MB)

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https://pos.sissa.it/501/1293/

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https://doi.org/10.22323/1.501.1293
 http://hdl.handle.net/11603/40745

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

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Date

2024-09-24

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conference papers and proceedings
preprints
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This 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.
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Abstract

The 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.