Physics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..657s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 11, July 1984, p. 657-660. Research supported by the U.S. Department of Ener
Physics
116
Earth Magnetosphere, Geomagnetic Tail, International Sun Earth Explorer 3, Plasma Compression, Polar Substorms, Magnetic Signatures, Plasma Density, Plasma Waves, Space Plasmas
Scientific paper
While in the lobes of the distant magnetotail, ISEE-3 encountered regions of compressed magnetic field at a rate of several per day. The duration of these events was 5 to 20 minutes and they were observed 10 to 30 minutes following the onset of substorm activity near the earth. During each event, the lobe magnetic field tilted first northward and then southward with the inflection point near the time of peak field strength. Following the compression events, the lobe field weakened and retained a southward component for 20 to 40 minutes. It is suggested that these traveling compression regions are the lobe signatures of plasmoids moving rapidly down the tail in the plasma sheet. Comparison of ISEE-3 compression event times with substorm onset times yielded propagation speeds of 350 to 750 km/s.
Baker Daniel N.
Gosling Jack T.
Hones Edward W.
Scarf Frederick L.
Sibeck David G.
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