The equatorward boundary of auroral ion precipitation

Details The equatorward boundary of auroral ion precipitation The equatorward boundary of auroral ion precipitation

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.3273g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, April 1, 1987, p. 3273-3283.

Physics

41

Auroral Ionization, Electron Precipitation, Magnetic Storms, Magnetohydrodynamic Waves, Solar Wind, Dmsp Satellites, Electric Fields, Electron Density (Concentration), Electron Trajectories

Scientific paper

The DMSP SSJ/4 precipitating ion and electron data were used to study the differences in the location of the equatorward boundaries of auroral ion and electron precipitation. It was found that, with increasing magnetic activity (Kp), both boundaries move to lower latitudes in a regular fashion. On the morningside of the oval, from 0400 to 0800 MLT, the electron equatorward boundary is about 2.6 deg MLAT lower than the ion equatorward boundary, while on the evening side of the oval, from 1700 to 2200 MLT, the equatorward electron boundary is about 1.4 deg MLAT higher than the ion boundary. The difference between the equatorward electron and ion boundaries on both morningside and eveningside of the oval increases with MLT from midnight toward noon; this difference is independent of Kp.

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