Average electron precipitation patterns and visual aurora characteristics during geomagnetic quiescence

Mathematics – Logic

Scientific paper

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Auroras, Electron Precipitation, Geomagnetism, Polar Regions, Spatial Distribution, Daytime, Meteorological Satellites, Night Sky, Northern Hemisphere, Southern Hemisphere

Scientific paper

The pattern of polar region electron precipitation during geomagnetically quiet periods is examined using measurements from the Defense Meteorological Satellite Program (DMSP) F2, F3, and F4 satellites. Two examples of typical auroral electron precipitation observations, one dawn-dusk and the other noon-midnight, during quiet geomagnetic conditions are shown. The method of determining the precipitation boundaries used in the analysis is shown, and the characteristics of the optical auroras during quiet periods are examined using DMSP auroral imagery. Statistical distributions of three precipitation boundaries in four magnetic local time sectors are presented, and the effects of the interplanetary magnetic field B(z) component on the positions of those boundaries are analyzed.

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