Multiple Radially Aligned Plasmaspheric Structures Observed by IMAGE EUV

Details Multiple Radially Aligned Plasmaspheric Structures Observed by IMAGE EUV Multiple Radially Aligned Plasmaspheric Structures Observed by IMAGE EUV

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm32a25g&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM32A-25

Physics

2730 Magnetosphere--Inner, 2752 Mhd Waves And Instabilities, 2768 Plasmasphere

Scientific paper

The IMAGE EUV imager has observed several instances where the outer plasmasphere is populated by multiple, radially aligned structures resembling "plasmaspheric fingers". On June 28th these features are found to become bifurcated with increasing distance from the Earth. On this day, three enhanced density structures are seen inside about L=2, extended across about 5 hours MLT. At larger distances the three structures connect to what appear to be five distinct, narrow density filaments. One possible explanation being explored is the development of a ULF standing wave pattern that causes the observed finger-like plasma distribution. An analysis of such line-of-sight observations of He+ ions in the plasmasphere will be presented. Possible explanations will be discussed.

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