• Sunspot proper motions in active region NOAA 2372 and its flare activity during SMY period of 1980 April 4–13

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    • Keywords


      sunspot proper motion; magnetic energy buildup; flare productivity

    • 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.

    • Author Affiliations


      Ashok Ambastha1 Arvind Bhatnagar1

      1. Udaipur Solar Observatory, 11 Vidya Marg, Udaipur - 313001
    • Dates

  • Journal of Astrophysics and Astronomy | News

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