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Cross Correlation Analysis of Ionospheric Parameters with Symmetric-H and Auroral Electrojet Indices during Geomagnetic Storms
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  • Pitri Bhakta Adhikari,
  • Samyam Pudasaini,
  • Binod Adhikari,
  • Rohit Bhattarai,
  • Iva Kumari Lamichhane,
  • Manghang Limbu,
  • Pramod Kamal Kharel,
  • Aasis Bhandari
Pitri Bhakta Adhikari
Tri-Chandra College

Corresponding Author:[email protected]

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Samyam Pudasaini
Tri-Chandra M. Campus
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Binod Adhikari
St.Xavier's College, ,Maitighar
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Rohit Bhattarai
Tri-Chandra M. Campus
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Iva Kumari Lamichhane
Tri-Chandra M. Campus
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Manghang Limbu
Tri-Chandra M. Campus
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Pramod Kamal Kharel
Tri-Chandra M. Campus
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Aasis Bhandari
Tri-Chandra M. Campus
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Abstract

This paper investigates the effects of geomagnetic storms of 25-27 September 2011, 16- 18 March 2013, and 6-8 September 2015 over five mid latitudes stations (Dourbes, Fairford, Moscow, Rome, and Roquetes) and performs a cross correlation analysis of ionospheric and solar parameters during these storms. We observed the highest fluctuations in ionospheric variables during the main phase of storms. In addition, there is strong evidence of pre-storm phenomenon occurring at least a few hours and more than 24 hours prior to the main phase of the geomagnetic storms. We found that the TEC and foF2 parameters have strong dependence with latitudes for the events with Sudden Storm Commencement(SSC) in mid latitude region. Relatively low TEC and foF2 can be observed in Moscow which is at the highest latitude among the five stations because of a decrease in the n(O)/n(N2) ratio through out the storm event. However, for the event with gradual storm commencement, there is no evidence of such dependence. The good correlation of Symmetric-H and Auroral Electrojet Indices with ionospheric parameters indicates that the coupling mechanism between magnetosphere and ionosphere produces intense electric field disturbances in the middle low latitudes.