Physics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3805w&link_type=abstract
Journal of Geophysical Research, vol. 83, Aug. 1, 1978, p. 3805-3817, 3819-3829.
Physics
9
Earth Magnetosphere, Geomagnetic Tail, Graphs (Charts), High Energy Electrons, Magnetic Field Configurations, Night Sky, Atmospheric Models, Auroral Zones, Dynamic Pressure, Interplanetary Magnetic Fields, Magnetic Storms, Plasma Density, Plasma Sheaths, Solar Wind
Scientific paper
Particle and field data are analyzed for a number of magnetically quiet days. It is shown that the magnetotail near midnight may exist for hours at a time in widely different quasi-stable configurations which, in their limit, can be characterized as being (1) fairly dipolelike to about 15 R(E), beyond which the field becomes taillike; and (2) dipolelike to only about 10 R(E), beyond which the field becomes taillike. These different states affect both the dynamics of the substorm and the evolution of the pitch angle distributions of energetic electrons in the near-earth plasma sheet past midnight. During quiet times, the plasma sheet in its azimuthal variation is at its thinnest in the region near midnight.
Buck R. M.
Galland Kivelson Margaret
West I. Jr. H.
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