Relationship between IMF By and geomagnetic activity in the southern polar cap

Details Relationship between IMF By and geomagnetic activity in the southern polar cap Relationship between IMF By and geomagnetic activity in the southern polar cap

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993angeo..11..470s&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 11, no. 6, p. 470-478.

Physics

3

Geomagnetism, Interplanetary Magnetic Fields, Ionospheric Disturbances, Polar Caps, Polar Substorms, Solar Activity Effects, Correlation Coefficients, Ionospheric Currents, Magnetoactivity

Scientific paper

We have examined the magnetic variations at Mirny, Scott Base, Dumont d'Urville, and Vostok in the southern polar cap, for its dependence on the interplanetary magnetic field (IMF) By in 1980 (near solar activity maximum). We have found that the correlation between the average values of the disturbance field in the H component from the four stations and IMF By is higher during local summer than during local winter, and the correlation is better with average values of the disturbance field in the H component than in the D and Z components. Based on these results we propose a method of estimating instantaneously the sign and the magnitude of IMF By, from ground-based magnetic observations.

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