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Ulysses plasma observations of coronal mass ejections near 2.5 AU
Author(s) -
Phillips J. L.,
Bame S. J.,
Gosling J. T.,
McComas D. J.,
Goldstein B. E.,
Smith E. J.,
Balogh A.,
Forsyth R. J.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl00529
Subject(s) - coronal mass ejection , interplanetary spaceflight , physics , geomagnetic storm , solar wind , ecliptic , astrophysics , interplanetary medium , astronomy , longitude , plasma , latitude , quantum mechanics
The Ulysses solar wind plasma experiment observed a series of interplanetary shocks and coronal mass ejections (CMEs), the latter evidenced by counterstreaming electrons and a variety of ion signatures, during March and April 1991. A striking sequence was observed near 2.5 AU from March 23 through April 2, with the second of two counterstreaming events lasting 6.4 days. We summarize the plasma observations for these features, suggesting that the second counterstreaming period may be two juxtaposed CMEs. The relationship between the events observed at Ulysses, ∼60° east of Earth in ecliptic longitude, and those causing a geomagnetic storm on March 24, is unclear.