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Equatorward shift of the cleft during magnetospheric substorms as observed by Isis 1Isis 1 satellite observations of the cleft position during magnetospheric substorms show that the cleft shifts equatorward as the interplanetary B sub z component turns southward and substorm activity increases and that it shifts back toward higher latitudes as substorm activity subsides and B sub z returns northward. Also, unusually low latitudes for the cleft (less than 70 deg invariant latitude) were found during geomagnetic storms with significant Dst values and large negative B sub z values. Significant shifts occur in the cleft location with no accompanying effect seen in the AE index; however, B sub z is observed to be southward during these periods.
Document ID
19740029880
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yasuhara, F.
Akasofu, S.-I.
(Alaska, University College, Alaska, United States)
Winningham, J. D.
Heikkila , W. J.
(Texas, University Dallas, Tex., United States)
Date Acquired
August 7, 2013
Publication Date
November 1, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
Geophysics
Report/Patent Number
AFCRL-TR-74-0047
Accession Number
74A12630
Funding Number(s)
CONTRACT_GRANT: NSF GA-28101
CONTRACT_GRANT: NAS5-9112
CONTRACT_GRANT: F19628-72-C-0230
Distribution Limits
Public
Copyright
Other

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