Physics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.8009l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, June 1, 1990, p. 8009-8017. Research supported by NASA.
Physics
111
Current Distribution, Current Sheets, Geomagnetic Tail, Magnetic Field Configurations, Magnetic Storms, Satellite Observation, Ampte (Satellites), Goes Satellites, Ground Stations, Plasma Sheaths, Spatial Distribution, Synchronous Satellites
Scientific paper
Results are presented on observations from four satellites (GOES 5, GOES 6, AMPTE CCE, and AMPTE IRM) and two ground stations (San Juan and Tucson) on a substorm that occurred on April 19, 1985 at about 0830 UT. The four spacecraft were arrayed in a configuration that made it possible to separate the effects arising from the longitudinal versus the radial expansion of the substorm current wedge and thus to examine its spatial evolution. The sequence of events that was observed suggests that, during this substorm, the disruption of the cross-tail current sheet, the formation of the substorm current wedge, and the expansion of the plasma sheet began in the near-earth region, and subsequently spread tailward as well as longitudinally.
Lopez Robert E.
Lui Anthony Tat Yin
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