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Variation of Solar Wind Parameters and Total Electron Content from Indian, Australian, Brazilian and South African Sectors during the Intense Geomagnetic Storms
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  • Binod ADHIKARI,
  • Roshan Kumar Mishra,
  • Narayan P. Chapagain,
  • Rabin Baral,
  • Priyanka Kumari Das,
  • Virginia Klausner,
  • Manisha Sharma
St.Xavier's College, ,Maitighar, Kathmandu, Nepal

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Roshan Kumar Mishra
St. Xavier's College
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Narayan P. Chapagain
University of Illinois at Urbana Champaign
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Rabin Baral
St. Xavier's College
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Priyanka Kumari Das
St, Xavier's College
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Virginia Klausner
Vale do Paraiba University
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Manisha Sharma
St. Xavier's College
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In this paper, we present the variations of IMF-Bz, Solar wind Parameters (Vsw, Nsw, and Psw), and Geomagnetic Indices (AE and SYM-H), and the variation of Vertical Total Electron Content (VTEC) using simultaneous VTEC data from 12 GPS-TEC stations over the Indian, Australian, Brazilian and South African regions. We describe contrast in Total Electron Content (TEC) throughout the globe using global ionospheric maps at regular 2-hour interval of UT during the three intense geomagnetic storms. Moreover, we observed that heavily TEC influenced areas were found to be transposing through equatorial plane starting from eastern sectors to the western sectors. Indian Ocean, Atlantic Ocean and South Pacific Ocean sectors were affected flowingly. Global Ionospheric Maps evince that Indian and Brazilian sectors were affected heavily explaining the TID and Equatorial Anomaly as seen on those areas. The equatorial and low-latitude regions have been mainly affected by the geomagnetic storms. All these results suggested that the acute disruption of global winds (surging towards the equator from higher latitudes) and electric fields commenced from magnetosphere-ionosphere interaction cause the severe modification in the equatorial, low-latitude region. We checked the cross correlation during the period of high solar and geomagnetic activities; the correlation gradually increased with the near by stations by latitudes in most of the cases which was another intriguing result. the storms were affected globally which is why we believe that variation of TEC over various stations of the globe could turn out to be very helpful in predicting solar wind coupling with magnetosphere-ionospehere.