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Published October 1977 | Published
Journal Article Open

The relationship of energy flow at the magnetopause to geomagnetic activity

Abstract

Properties of the energetic electron (E ≳ 200 keV) magnetopause layer along the distant magnetotail have been studied with Caltech instrumentation aboard IMP-8 for approximately 60 spacecraft orbits. The cross-sectional area of the layer appears to increase by a factor of ∼ 5 with increasing geomagnetic activity, and the average unidirectional electron flux within the layer increases by a factor of ∼ 4. The energy carried by electrons ≳ 200 keV ranges from ∼ 10^(14) ergs sec^(−1) to ∼ 10^(15) ergs sec^(−1). Extrapolation to include all electrons > 1 keV suggests total energy flow ranging from ∼ 3×10^(15) ergs sec^(−1) at quiet times to ∼ 5×10^(18) ergs sec^(−1) at magnetically disturbed times.

Additional Information

© 1977 by the American Geophysical Union. Manuscript Accepted: 11 Aug 1977. Manuscript Received: 29 Jul 1977. This work was supported in part by the National Aeronautics and Space Administration under contract NAS5-11066 and Grant NGR0 5-002-160.

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August 19, 2023
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