Dependence of magnetic activity on the orientation of the geomagnetic dipole relative to the interplanetary magnetic field

Details Dependence of magnetic activity on the orientation of the geomagnetic dipole relative to the interplanetary magnetic field Dependence of magnetic activity on the orientation of the geomagnetic dipole relative to the interplanetary magnetic field

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ge%26ae..22..791d&link_type=abstract

Geomagnetizm i Aeronomiia, vol. 22, Sept.-Oct. 1982, p. 791-796. In Russian.

Physics

Auroral Electrojets, Geomagnetism, Interplanetary Magnetic Fields, Magnetic Dipoles, Electric Fields, Harmonic Analysis, Ionospheric Currents, Magnetosphere-Ionosphere Coupling, Solar Wind

Scientific paper

An analysis of data regarding the AL index for 1966-1973 shows that the intensity of the western auroral electrojet depends on the angle of inclination of the geomagnetic axis to the vector of the electromagnetic energy flux of the solar wind as well as on the zenith angle between the geomagnetic axis and the normal to the ecliptic plane. As the aforementioned inclination angle increases, the intensity of the western electrojet increases when the IMF is directed away from the sun, and its intensity decreases when the IMF is directed toward the sun. The intensity of the western electrojet increases as the aformentioned zenith angle decreases. This behavior is explained by the interaction of the solar-wind electric field with the three-dimensional system of magnetospheric-ionospheric currents.

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