• Photospheric, chromospheric and helioseismic signatures of a large flare in super-active region NOAA 10486

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      https://www.ias.ac.in/article/fulltext/joaa/027/02-03/0255-0265

    • Keywords

       

      Solar flares; flare trigger; ring diagram

    • Abstract

       

      NOAA 10486 produced several powerful flares, including the 4B/X17.2 superflare of October 28, 2003/11:10 UT. This flare was extensively covered by theHα and GONG instruments operated at the Udaipur Solar Observatory (USO). The central location of the active region on October 28,2003 was well-suited for the ring diagram analysis to obtain the 3-D power spectra and search for helioseismic response of this large flare on the amplitude, frequency and width of the p-modes. Further, using USO observations, we have identified the sites of new flux emergences, large proper motions and line-of-sight velocity flows in the active region and their relationship with the flare.

    • Author Affiliations

       

      Ashok Ambastha1

      1. Physical Research Laboratory, Udaipur Solar Observatory, Udaipur - 313 001, India
    • Dates

       
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