The longitudinal and radial distribution of magnetic reconfigurations in the near-earth magnetotail as observed by AMPTE/CCE

Details The longitudinal and radial distribution of magnetic reconfigurations in the near-earth magnetotail as observed by AMPTE/CCE The longitudinal and radial distribution of magnetic reconfigurations in the near-earth magnetotail as observed by AMPTE/CCE

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..997l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Feb. 1, 1988, p. 997-1001.

Physics

38

Geomagnetic Tail, Magnetic Field Configurations, Satellite Observation, Spaceborne Experiments, Ampte (Satellites), Equatorial Atmosphere, Kp Index, Night Sky, Polarization Characteristics

Scientific paper

The longitudinal and radial distribution of 103 substorm dipolarization events in the equatorial nightside magnetosphere from low altitude to about 9 R(E) observed by AMPTE/CCE is examined. The center of the distribution was located near midnight. For Kp of 3- or less, the distribution peak shifted toward the premidnight region, whereas for Kp of 4+ and higher, the distribution peak was inside the postmidnight region. The substorm frequency for the high-Kp case was about four times larger than the low-to-moderate-Kp case. The occurrence frequency of events increased with increasing radial distance, and no events were observed inside of 6.4 R(E). This radial distribution suggests that, on average, the substorm initiation region is greater than about 8 R(E). In addition, the average radial position of the signatures decreased with increasing Kp.

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