Single vortex current system in the polar region generated by an interplanetary shock wave

Details Single vortex current system in the polar region generated by an interplanetary shock wave Single vortex current system in the polar region generated by an interplanetary shock wave

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..535i&link_type=abstract

Geophysical Research Letters, vol. 9, May 1982, p. 535-538.

Physics

5

Interplanetary Magnetic Fields, Ionospheric Currents, Magnetic Storms, Polar Regions, Shock Waves, Vortices, Magnetic Signatures, Periodic Variations, Sudden Storm Commencements

Scientific paper

A single vortex current system encircling the cusp region, when the IMF is continuously northward and in the vicinity of an interplanetary shock wave, is found to be the equivalent current of a sudden commencement main impulse in the polar region. The twin-vortex current pattern previously seen as the main impulse's current system is found to largely appear when the IMF is southward, and this IMF dependence of the current pattern is hypothesized to be the result of a superposition of either the DP2 current vortex structure or the substorm current system on the main impulse's single vortex system.

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