Abstract Geomagnetic activity, if analysed not from the viewpoint of individual solar cycles but of polarity of the main solar dipole field, shows a 12-month wave with maxima alternatively at the vernal or autumnal equinoxes. Whether the vernal or the autumnal maximum is greater depends on the polarity of the main solar dipole; the existence of the wave may be explained by the north-south asymmetry in the main solar dipole field. The results favour the southward component of the interplanetary magnetic field as the decisive factor for geomagnetic activity.
Asymmetry of the main solar dipole field resulting in a 12-month wave in geomagnetic activity
Advances in Space Research ; 8 , 7 ; 195-198
01.01.1989
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Geomagnetic activity and solar cycles
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