Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm42e..06e&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM42E-06
Other
2768 Plasmasphere, 2772 Plasma Waves And Instabilities, 2778 Ring Current
Scientific paper
Electromagnetic Ion Cyclotron (EMIC) waves pitch angle scatter ions into the loss cone, providing a loss or recovery mechanism after geomagnetic storms. One of the regions of enhanced wave growth is the overlapping region near the plasmapause, where the inner edge of the ring current extends into the plasmasphere. Satellite measurements of EMIC waves suggest that the occurrence of these waves is too low to play a major role in ring current recovery. However, the satellite EMIC wave observations are not comprehensive enough to rule this process out. In this paper we will explore another technique that may provide a more comprehensive view of ring current loss, namely the observation of localized ion precipitation bursts. These energetic proton bursts occur near the plasmapause and are localized in latitude (a few degrees or less) precipitation data collected from low earth orbiting satellites (NOAA-10 and others). In this talk we will present evidence linking these bursts to EMIC waves in order to establish the connection of these localized proton precipitation bursts and EMIC wave pitch angle scatting.
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