Sunspot proper motions in active region NOAA 2372 and its flare activity during SMY period of 1980 April 4–13 |
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| Authors: | Ashok Ambastha Arvind Bhatnagar |
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| Institution: | (1) Udaipur Solar Observatory, 11 Vidya Marg, 313001 Udaipur |
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| Abstract: | Solar Active Region NOAA 2372 was observed extensively by the Solar Maximum Mission (SMM) satellite and several ground-based
observatories during 1980 April 4–13 in the Solar Maximum Year. After its birth around April 4, it underwent a rapid growth
and produced a reported 84 flares in the course of its disc passage. In this paper, we have studied photospheric and chromospheric
observations of this active region together with Marshall Space Flight Center magnetograms and X-ray data from HXIS aboard
the SMM satellite. In particular, we discuss the relationship of the flare-productivity with sunspot proper motions and emergence
of new regions of magnetic flux in the active region from its birth to its disappearance at the W-limb. |
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| Keywords: | sunspot proper motion magnetic energy buildup flare productivity |
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