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The variable source of the plasma sheet during a geomagnetic storm

Asamura, K.; Kistler, L. M.; Mouikis, C. G. +8 more

Both solar wind and ionospheric sources contribute to the magnetotail plasma sheet, but how their contribution changes during a geomagnetic storm is an open question. The source is critical because the plasma sheet properties control the enhancement and decay rate of the ring current, the main cause of the geomagnetic field perturbations that defi…