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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

stormtime

stormtime

During periods when geomagnetic storms affect Earth, new low-energy protons (with energy of tens of thousands of electronvolts, or keV; shown here in magenta) enter the near-Earth region, enhancing the preexisting ring current (orange).
Credit: Johns Hopkins APL