• 146-day signal in the geomagnetic field—a probable association with the periodicity of the solar flare index

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Flare index; 146-day period; geomagnetic planetary index; geomagnetic field

    • Abstract


      Results on the spectral analysis using geomagnetic field at three low latitude stations and the planetary magnetic activity index have shown peaks in the power densities in a broad band centred around 146-day period. This periodic behaviour appears to be close to that shown by the solar flare activity index for the same interval. It is suggested that the geoeffectiveness of the flare activity signal in different phases of the solar cycle can be better worked out using long series of ground-based geomagnetic data.

    • Author Affiliations


      D R K Rao1 B D Kadam1

      1. Indian Institute of Geomagnetism, Bombay - 400005, India
    • Dates

  • Journal of Earth System Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.