The Global Development of Energetic Electron Precipitation During the Storm Sudden Commencement on September 24, 1998

Details The Global Development of Energetic Electron Precipitation During the Storm Sudden Commencement on September 24, 1998 The Global Development of Energetic Electron Precipitation During the Storm Sudden Commencement on September 24, 1998

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm22a0563u&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM22A-0563

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2720 Energetic Particles, Trapped, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

Observations by the PIXIE and UVI cameras on the POLAR satellite give information about the global distribution of energetic electron precipitation. We have studied the development of the electron precipitation observed in connection with the sudden commencement of the geomagnetic storm occurring on September 24-25, 1998. The SSC, which occurred in the late recovery phase of a complex substorm period, caused transient (~4 min) precipitation of energetic electrons (>5 keV) in the morning - pre noon magnetic local time sector. The precipitation shows azimuthal spectral differences. We suggest that this precipitation is caused by wave particle interaction. Simultaneously, the LANL geosynchronous spacecraft see a rapid increase in the electron fluxes in the morning sector associated with the SSC. In the precipitation of less energetic electrons, a prolonged enhancement is occurring in the afternoon MLT sector. This precipitation may be associated with field aligned currents set up in the afternoon sector in connection with the SSC.

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