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Observations of vector magnetic fields in flaring active regionsWe present vector magnetograph data of 6 active regions, all of which produced major flares. Of the 20 M-class (or above) flares, 7 satisfy the flare conditions prescribed by Hagyard (high shear and strong transverse fields). Strong photospheric shear, however, is not necessarily a condition for a flare. We find an increase in the shear for two flares, a 6-deg shear increase along the neutral line after a X-2 flare and a 13-deg increase after a M-1.9 flare. For other flares, we did not detect substantial shear changes.
Document ID
19950043380
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chen, Jimin
(California Institute of Technology, Pasadena, CA United States)
Wang, Haimin
(California Institute of Technology, Pasadena, CA United States)
Zirin, Harold
(California Institute of Technology, Pasadena, CA United States)
Ai, Guoxiang
(Chinese Academy of Sciences Beijing, China)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Solar Physics
Volume: 154
Issue: 2
ISSN: 0038-0938
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NAGW-1972
CONTRACT_GRANT: NSF ATM-91-22023
CONTRACT_GRANT: N00014-89-J-1069
CONTRACT_GRANT: NSF INT-92-06863
CONTRACT_GRANT: NAG5-2090
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Public
Copyright
Other
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