Latitudinal electron precipitation patterns during large and small IMF magnitudes for northward IMF conditions

Details Latitudinal electron precipitation patterns during large and small IMF magnitudes for northward IMF conditions Latitudinal electron precipitation patterns during large and small IMF magnitudes for northward IMF conditions

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93...97m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Jan. 1, 1988, p. 97-104. Research supported by the National Institute

Physics

16

Electron Precipitation, Interplanetary Magnetic Fields, Magnetic Anomalies, Polar Caps, Polar Regions, Solar Wind, Dmsp Satellites, Electron Energy, Field Aligned Currents, Geomagnetic Tail

Scientific paper

It is demonstrated that there are distinct differences in the electron precipitation patterns (or the polar cap size), geomagnetic activity, and field-aligned currents in the highest-latitude region for small and large IMF B(z) values when the IMF B(z) component is positive. First, during periods of weakly northward IMF, there is a distinct area in the highest-latitude region in which the electron precipitation is absent except for the polar rain. By contrast, during strongly northward IMF, the entire polar region is often filled with burst-type soft electron precipitations. Second, geomagnetic disturbances and field-aligned-current intensities in the highest-latitude region are less during a weak IMF B(z) condition than those during a strongly northward IMF B(z) condition. Geomagnetic activity in the auroral zone for both conditions is absent or very weak.

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