Geomagnetic storms driven by the solar wind can cause the flux of high-energy electrons in the Earth's Van Allen belts to rapidly fall. Analysis of data obtained during one such event from multiple spacecraft located at different altitudes in the magnetosphere reveals just where these electrons go.
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Hudson, M. Where did all the electrons go?. Nature Phys 8, 182–183 (2012). https://doi.org/10.1038/nphys2254
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DOI: https://doi.org/10.1038/nphys2254
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