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Observations of vector magnetic fields in flaring active regions

Chen, Jimin and Wang, Haimin and Zirin, Harold and Ai, Guoxiang (1994) Observations of vector magnetic fields in flaring active regions. Solar Physics, 154 (2). pp. 261-273. ISSN 0038-0938. https://resolver.caltech.edu/CaltechAUTHORS:20200519-152432611

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Abstract

We 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/bf00681099DOIArticle
https://ui.adsabs.harvard.edu/abs/1994SoPh..154..261C/abstractADSArticle
https://doi.org/10.1007/BF00680843DOIErratum
https://ui.adsabs.harvard.edu/abs/1995SoPh..158..205C/abstractADSErratum
ORCID:
AuthorORCID
Wang, Haimin0000-0002-5233-565X
Additional Information:© 1994 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 30 December 1993; Revised 12 July 1994. We thank Mr Marc Tamsky for helpful discussions. The study was supported by NSF grants INT-9206863 and ATM-9122023, by NASA grant NAGW-1972, and by ONR grant N00014-89-J-1069. HW acknowledges support from NASA grant NAG5-2090.
Errata:Erratum. Sol Phys 158, 205 (1995). https://doi.org/10.1007/BF00680843
Funders:
Funding AgencyGrant Number
NSFINT-9206863
NSFATM-9122023
NASANAGW-1972
Office of Naval Research (ONR)N00014-89-J-1069
NASANAG5-2090
Subject Keywords:Magnetic Field; Flare; Active Region; High Shear; Neutral Line
Issue or Number:2
Record Number:CaltechAUTHORS:20200519-152432611
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200519-152432611
Official Citation:Chen, J., Wang, H., Zirin, H. et al. Observations of vector magnetic fields in flaring active regions. Sol Phys 154, 261–273 (1994). https://doi.org/10.1007/BF00681099
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103330
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:19 May 2020 23:01
Last Modified:02 Jun 2020 18:10

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