Physics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..165m&link_type=abstract
Geophysical Research Letters, vol. 2, May 1975, p. 165-168.
Physics
1
Current Sheets, Electric Fields, Geomagnetic Tail, Neutral Sheets, Electric Current, Inductance, Magnetic Storms, Magnetic Variations, Time Dependence
Scientific paper
The inductive electric field produced by a time-dependent geomagnetic-tail current is investigated using a 'theta' model in which a flat sheet of current flowing westward represents the neutral sheet and return currents flowing eastward on the boundary of the tail. The induced electric field is calculated from the magnetic vector potential, and the time dependence of the current density is described by a linear variation. It is found that the inductive electric field is predominantly in the east-west direction and is fairly uniform over a large range of east-west and antisolar directions. It is shown that an east-west inductive electric field with a peak value of 0.70 mv/m is produced during substorms by a tail-current time variation corresponding to a rate of change of about 0.01 gamma/sec in the total magnetic field near the inner edge of the neutral sheet.
Kim Jinyoung Serena
Murphy C. H.
Wang Samuel C.
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