A possible current system associated with the Sqp variation

Details A possible current system associated with the Sqp variation A possible current system associated with the Sqp variation

Mar 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21..329k&link_type=abstract

Planetary and Space Science, Volume 21, Issue 3, p. 329-337.

Physics

8

Scientific paper

It is suggested that the quiet day daily magnetic variation in the polar cap region, Sqp, results partly from the short-circuit effect of the magnetotail current by the polar ionosphere. This implies that there is an inward field-aligned current from the dawnside magnetopause to the forenoon sector of the auroral oval (positively charged) and an outward field-aligned current to the duskside magnetopause from the afternoon sector of the oval (negatively charged), together with the ionospheric (Pedersen and Hall) currents. The distribution of the magnetic field vectors of both combined current systems agrees with the observed Sqpvector distribution. The space charges provide an electric field distribution which is similar to that which has been observed by polar orbiting satellites.

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