Evolution of the ring current during two geomagnetic storms

Details Evolution of the ring current during two geomagnetic storms Evolution of the ring current during two geomagnetic storms

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.7459l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, July 1, 1987, p. 7459-7470.

Physics

137

Geomagnetism, Magnetic Storms, Particle Precipitation, Ring Currents, Ampte (Satellites), Magnetic Field Configurations, Plasma Currents, Pressure Gradients

Scientific paper

Two geomagnetic storms in September 1984 were studied to examine the progressive changes in the radial profiles of particle pressure, plasma beta, and electric currents of the ring current region during the course of geomagnetic storms. It is shown that enhancements in the particle pressure occur initially in the outer region and reach the inner region in the late phase of the storm. Structures suggestive of multiple particle injections are seen in the pressure profile. The leading and trailing edges of the particle injection structures are respectively associated with the depressions and enhancements of the westward current densities of the ring current. The location of the maximum ring current particle pressure can be several earth radii from where the most intense westward ring current flows.

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