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    • A rapidly evolving active region NOAA 8032 observed on April 15th, 1997

      Shibu K. Mathew Ashok Ambastha

      Volume 21 Issue 3-4 September 2000 pp 233-236

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      https://www.ias.ac.in/article/fulltext/joaa/021/03-04/0233-0236

    • Abstract

       

      The active region NOAA 8032 of April 15, 1997 was observed to evolve rapidly. The GOES X-ray data showed a number of sub-flares and two C-class flares during the 8–9 hours of its evolution. The magnetic evolution of this region is studied to ascertain its role in flare production. Large changes were observed in magnetic field configuration due to the emergence of new magnetic flux regions (EFR). Most of the new emergence occured very close to the existing magnetic regions, which resulted in strong magnetic field gradients in this region. EFR driven reconnection of the field lines and subsequent flux cancellation might be the reason for the continuous occurrence of sub-flares and other related activities.

    • Author Affiliations

       

      Shibu K. Mathew1 Ashok Ambastha1

      1. Udaipur Solar Observatory, P. O. Box: 198, Udaipur - 313 004, India

    • Dates

       
      Published
      12 September 2000

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