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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/029/01-02/0293-0302

    • Keywords

       

      IP parameters; IP shocks; solar; terrestrial relationship.

    • Abstract

       

      In the present study, we investigate the possible relationship of IP parameters of solar wind and interplanetary magnetic field with ground-based geomagnetic indices. To carry out the study, we take all the IP shock events listed by Proton Monitor onboard Solar and Heliospheric Observatory (SOHO) during 2005, and plot the time variations of all the IP parameters and geomagnetic parameters (±5 days), centered at the shock arrival time. Next, we obtain scatter plots of absolute values of solar wind parameters such as Vsw, Nsw and Interplanetary Magnetic Field (IMF) components Bx, By, Bz and total B with the values of geomagnetic parameters such as Dst, Kp indices, dayside Magnetopause (MP) distance and Cosmic-Ray Neutron Monitor count (CRNM). The scatter plots show that before the IP shock, the pattern is random with no clear relationship. Following the shock, a clear pattern emerges with a type of relationship being seen – clear for SHARP shocks and less clear for DIFFUSE shocks. A total of 10 shock events for 2005 have been studied. Typical examples of this behaviour are the shock events of January 21, 2005 and May 15, 2005.

      Our study suggests a definite correlation between changes in the solar wind and interplanetary magnetic field parameters and ground-based geomagnetic response. We are trying to obtain quantitative relationships between these for shock events of 2005.

    • Author Affiliations

       

      Jatin Rathod1 Girija Rajaram1 Radharani Alyana1 A. Chandrasekhar Reddy1 D. S. Misra1 C. G. Patil2 M. Y. S. Prasad3 A. G. Ananth4

      1. CSRE, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
      2. MCF- Indian Space Research Organisation, PB No. 66, Hassan, Karnataka 573 201, India.
      3. SITAA-SAC, Indian Space Research Organisation, Ahmedabad, Gujarat 380 015, India.
      4. Indian Space Research Organisation-Head Quarters, Bangalore, Karnataka, India.

    • Dates

       
      Published
      6 March 2008

  • 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

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