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

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • 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

  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2023-2024 Indian Academy of Sciences, Bengaluru.