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The solar origins of two high-latitude interplanetary disturbancesTwo extremely similar interplanetary forward/reverse shock events, with bidirectional electron streaming were detected by Ulysses in 1994. Ground-based and Yohkoh/SXT observations show two strikingly different solar events that could be associated with them: an LDE flare on 20 Feb. 1994, and a extremely large-scale eruptive event on 14 April 1994. Both events resulted in geomagnetic storms and presumably were associated with coronal mass ejections. The sharply contrasting nature of these solar events argues against an energetic causal relationship between them and the bidirectional streaming events observed by Ulysses during its S polar passage. We suggest instead that for each pair of events. a common solar trigger may have caused independent instabilities leading to the solar and interplanetary phenomena.
Document ID
19960021340
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Hudson, H. S.
(Hawaii Univ. Honolulu, HI United States)
Acton, L. W.
(Montana State Univ. Bozeman, MT United States)
Alexander, D.
(Montana State Univ. Bozeman, MT United States)
Harvey, K. L.
(Solar Physics Research Corp. Tucson, AZ United States)
Kurokawa, H.
(Kyoto Univ. Japan)
Kahler, S.
(Phillips Lab. Hanscom AFB, MA United States)
Lemen, J. R.
(Lockheed Aircraft Corp. Palo Alto, CA United States)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Subject Category
Solar Physics
Accession Number
96N24736
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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