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Comments on filament-disintegration and its relation to other aspects of solar activity.Studies of sudden disintegrations of filaments in solar cycles 19 and 20 (to 1969) indicate that such events occur frequently. Approximately 30% of all large filaments in these cycles disintegrated in the course of their transit across the solar disk. 'Major' flares occurred with above average frequency on the last day on which 141 large disappearing filaments were observed. Relationships between a disintegrating filament on July 10-11, 1959, a prior major flare, a newly formed spot, and concomitant growth of H-alpha plage are presented. Observation of prior descending prominence material apparently directed towards the location of the flare of July 15, 1959 is reported. The development of the filament-associated flare of Feb. 13, 1967 is described.
Document ID
19720049116
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dodson, H. W.
Hedeman, E. R. (McMath-Hulbert Observatory Lake Angelus, Mich., United States)
Rovira De Miceli, M.
Date Acquired
August 6, 2013
Publication Date
April 1, 1972
Publication Information
Publication: Solar Physics
Volume: 23
Subject Category
SPACE SCIENCES
Funding Number(s)
CONTRACT_GRANT: NGL-23-005-275
Distribution Limits
Public
Copyright
Other