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Evidence for Subauroral Electric Fields from IMAGE EUVThe IMAGE Mission Extreme Ultraviolet Imager routinely provides global snapshots of the plasmasphere from high latitude. In these 10-minute images, intensity edges have been identified with the plasmapause and other strong gradients in plasmaspheric density. In addition to the classic sunward directed convection tail and its entrainment in corotation during storm-time recovery, the plasmapause boundary reveals a wide variety of structures thought to result from penetration of the solar wind induced convection electric field to subauroral latitudes. The so-called shoulder feature has most prominently been discussed in the context of under shielding in response to changes in the convection electric field strength. It is not yet clear whether all of the observed surface structures on the plasmasphere can be explained in this manner. The types of structures observed and their frequency of occurrence will be presented. A statistical view of these structures and associated solar wind conditions will also be presented.
Document ID
20030053452
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Six, N. Frank
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gallagher, D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Adrian, M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Goldstein, J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Sandel, B.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Astrophysics
Meeting Information
Meeting: AGU Fall Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 5, 2002
End Date: December 11, 2002
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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