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Chromospheric Evolution and the Flare Activity of Super-Active Region NOAA 6555Super-active region NOAA 6555 was highly flare productive during the period March 21st - 27th, 1991 of its disk passage. We have studied its chromospheric activity using high spatial resolution H alpha filtergrams taken at Udaipur along with MSFC vector magnetograms. A possible relationship of flare productivity and the variation in shear has been explored. Flares were generally seen in those subareas of the active region which possessed closed magnetic field configuration, whereas only minor flares and/or surges occurred in subareas showing open magnetic field configuration. Physical mechanisms responsible for the observed surges are also discussed.
Document ID
19990104322
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
PrasadC, Debi
(Udaipur Solar Observatory Ahmedabad, India)
Ambastha, Ashok
(Udaipur Solar Observatory Ahmedabad, India)
Srivastava, Nandita
(Udaipur Solar Observatory Ahmedabad, India)
Tripathy, Sushanta C.
(Udaipur Solar Observatory Ahmedabad, India)
Hagyard, Mona J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
March 1, 1997
Publication Information
Publication: Journal of Astrophysics and Astronomy
Publisher: Indian Academy of Sciences
Volume: 18
Issue: 1
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Other

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