Other
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27...19p&link_type=abstract
Planetary and Space Science, vol. 27, Jan. 1979, p. 19-30. Research supported by the University of Texas and Suomen Tiedeseuran
Other
Atmospheric Models, Earth Magnetosphere, Magnetic Storms, Polar Substorms, Auroral Zones, Field Aligned Currents, Geomagnetic Tail, Magnetic Effects, Magnetic Field Configurations, Ring Currents
Scientific paper
The proposed model for the onset of a magnetospheric storm assumes that the neutral sheet current is diverted around a small region, called a bubble. It is suggested that there is a linear variation of current with distance from the center of the bubble in the x-direction and that the diverted current is channeled within narrow paths on the dawn and dusk sides of the bubble. The addition of a current loop into the magnetotail produces a magnetic field structure with new neutral lines of X- and 0-type which are connected to each other as a continuous neutral ring in the xy equatorial plane. Calculated magnetic and electric field components as well as time-dependent evolution of the neutral ring show agreement with observations. It is shown that the induced electric field is at least comparable to the average cross-tail electrostatic field. The response of the plasma to the induction field, the production of field-aligned currents, and ground-based precipitation patterns of energized particles are discussed.
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