Auroral-polar currents during periods of moderate magnetospheric activity

Details Auroral-polar currents during periods of moderate magnetospheric activity Auroral-polar currents during periods of moderate magnetospheric activity

Jul 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974p%26ss...22.1101c&link_type=abstract

Planetary and Space Science, Volume 22, Issue 7, p. 1101-1115.

Computer Science

3

Scientific paper

Data from a meridian line of three component magnetometers were used to investigate the character of the equivalent overhead current flow at high latitudes during periods of moderately strong magnetospheric activity. The polar cap equivalent current flow is inexplicable in terms of our knowledge of the polar cap electric field configuration and probably represents the combined effect of several real current systems seated in the auroral oval and the polar cap. An important contributing factor is the current system associated with the interaction of the magnetosphere with the azimuthal component of the interplanetary magnetic field. The region of the Harang discontinuity is identifiable through the intrusion of polar cap equivalent current flow into the latitudinal regime normally occupied by the eastward and westward electrojets. The Harang discontinuity exhibits marked changes in scale size in association with substorm activity.

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