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The longitudinal and radial distribution of magnetic reconfigurations in the near-earth magnetotail as observed by AMPTE/CCEThe 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.
Document ID
19880038669
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lopez, R. E.
(Applied Research Corp. Landover, MD, United States)
Lui, A. T. Y.
(Applied Research Corp. Landover, MD, United States)
Sibeck, D. G.
(Applied Research Corp. Landover, MD, United States)
Mcentire, R. W.
(Applied Research Corp. Landover, MD, United States)
Zanetti, L. J.
(Johns Hopkins University Laurel, MD, United States)
Date Acquired
August 13, 2013
Publication Date
February 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
88A25896
Funding Number(s)
CONTRACT_GRANT: NASA TASK I
CONTRACT_GRANT: N00039-87-C-5301
Distribution Limits
Public
Copyright
Other

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