Electrodynamic patterns in the polar region during periods of extreme magnetic quiescence

Details Electrodynamic patterns in the polar region during periods of extreme magnetic quiescence Electrodynamic patterns in the polar region during periods of extreme magnetic quiescence

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9314515h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Dec. 1, 1988, p. 14515-14541.

Physics

35

Auroral Zones, Electrodynamics, Interplanetary Magnetic Fields, Polar Regions, Convection, Dynamics Explorer 2 Satellite, Electron Precipitation, Field Aligned Currents, Magnetic Variations

Scientific paper

Using data from the DE 2 satellite, the electrodynamic patterns in the polar region during periods of extreme magnetic and auroral quiescence are analyzed for the existence of region-1 and region-2 field-aligned current systems, convection patterns, and electron-precipitation boundaries. The large-scale region-1 and region-2 currents were found to be usually absent during quiet periods, except in the cusp region. Field-aligned currents continue to be present, but as small-scale structures distributed through the auroral oval and over the entire polar cap. Convection patterns were always found in the summer hemisphere, but not always in the winter hemisphere, while structured electron precipitation was found to extend over the entire polar region independent of season.

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