Figure 1 - The Hallowe'en storm.
From the following article
Tightening the radiation belts
Paul Hanlon
Nature Physics Published online: 8 September 2005
doi:10.1038/nphys128

In late 2003, a solar storm caused a massive distortion of the Earth's plasmasphere, shown in these images2, and of the Van Allen radiation belts. (Scale: units of Earth radius, equivalent to 6,372 km.)
