Physics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.2957c&link_type=abstract
Journal of Geophysical Research, vol. 85, June 1, 1980, p. 2957-2977.
Physics
9
Earth Magnetosphere, Explorer 47 Satellite, Geomagnetic Tail, Neutral Sheets, Plasma Dynamics, Field Aligned Currents, Geomagnetism, High Resolution, Magnetic Measurement, Magnetic Storms, Magnetohydrodynamic Flow, Periodic Variations, Turbulent Flow
Scientific paper
IMP 7 observations of plasma sheet structure and dynamics made during a 24-h period in which the satellite traversed the tail plasma sheet at a radial distance of 35 earth radii and remained within 2 earth radii of the expected position at the neutral sheet and in which at least five substorms occured on the ground are presented. High-time-resolution measurements of the magnetic field, plasma flow and greater than 50-keV protons obtained by the satellite and ground-based magnetic measurements are discussed for a 4-hr interval in which two small substorms occurred, a 6-hr geomagnetically quiet interval in which moderate variable plasma flows were observed, a very rapid, smooth neutral sheet crossing and earthward plasma flow during the expansion phase of a small substorm, a moderate-size substorm in which a prolonged interval of field-aligned tailward flow commenced at onset, a strong tailward and dawnward flow burst in an interval between substorms and a large substorm in which strong tailward flow was observed. Observations indicate the significant distortion of the tail field, possibly by plasma flow stresses, a neutral sheet structure occasionally resembling the hydromagnetic rotational discontinuity and a high level of magnetic turbulence during an earthward plasma flow which may contribute towards plasma sheet dissipation.
Coroniti Ferdinan V.
Frank Louis A.
Gloeckler George
Krimigis Stamatios M.
Lepping Ronald P.
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