IMF-driven plasmasphere erosion of 10 July 2000

Details IMF-driven plasmasphere erosion of 10 July 2000 IMF-driven plasmasphere erosion of 10 July 2000

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..46g&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 3, pp. 46-1, CiteID 1146, DOI 10.1029/2002GL016478

Physics

18

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Plasmasphere, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Magnetospheric Configuration And Dynamics

Scientific paper

On 10 July 2000, the IMAGE EUV imager observed erosion of the nightside plasmasphere that occurred in two bursts during 5-8 UT. The plasmapause radial velocity Vpp at 2.4 MLT was extracted from the time sequence of EUV images. We show that intervals of Vpp < 0 (i.e., erosion) are correlated with intervals of southward (Swd) interplanetary magnetic field (IMF), if the solar wind and IMF data are time-delayed by 30 minutes (in addition to a 3.7-minute delay for propagation to the magnetopause). This suggests that coupling between the solar wind and the plasmapause, involving processes in the ionosphere and magnetotail, takes about 30 minutes. A 6:40 UT magnetosphere compression may have hurried the onset of the second erosion.

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