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Activity associated with coronal mass ejections at solar minimum - SMM observations from 1984-1986Seventy-three coronal mass ejections (CMEs) observed by the coronagraph aboard SMM between 1984 and 1986 were examined in order to determine the distribution of various forms of solar activity that were spatially and temporally associated with mass ejections during solar minimum phase. For each coronal mass ejection a speed was measured, and the departure time of the transient from the lower corona estimated. Other forms of solar activity that appeared within 45 deg longitude and 30 deg latitude of the mass ejection and within +/-90 min of its extrapolated departure time were explored. The statistical results of the analysis of these 73 CMEs are presented, and it is found that slightly less than half of them were infrequently associated with other forms of solar activity. It is suggested that the distribution of the various forms of activity related to CMEs does not change at different phases of the solar cycle. For those CMEs with associations, it is found that eruptive prominences and soft X-rays were the most likely forms of activity to accompany the appearance of mass ejections.
Document ID
19920036827
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
St. Cyr, O. C. (High Altitude Observatory Boulder, CO, United States)
Webb, D. F. (Boston College Newton, MA, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Solar Physics
Volume: 136
ISSN: 0038-0938
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: F19628-87-K-0033
CONTRACT_GRANT: F19628-90-K-0006
CONTRACT_GRANT: NASA ORDER S-04167-D
Distribution Limits
Public
Copyright
Other