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This study examines the deviation in ionospheric total electron content (TEC) over Nepal during 49 geomagnetic storms of solar cycle 24. For this investigation, the daily RINEX files downloaded from the UNAVCO website are used to calculate the TEC on GPS measurements only. The study shows the increase and decrease in TEC during the event days. The increase or decrease in percentage TEC is compared to a reference quiet day. Among 49 selected storms in 26 stormy days the TEC has increased and in 23 stormy days the TEC has decreased. The maximum deviation in TEC is found during the recovery phase geomagnetic storm of 2010-08-04 and 2012-07-16. During storm on 2010-08-04 it is 101.97% increase and during storm of 2012-07-16 it is 50.68% decrease. The outcomes of this study enhance the understanding of ionospheric dynamics over Nepal under geomagnetically disturbed conditions.

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Effect of Geomagnetic Storm in Ionosphere Over Nepal

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Drabindra Pandit,
  • Christine Amory-Mazaudier,
  • Rolland Fleury,
  • Narayan Prasad Chapagain,
  • Binod Adhikari

摘要

This study examines the deviation in ionospheric total electron content (TEC) over Nepal during 49 geomagnetic storms of solar cycle 24. For this investigation, the daily RINEX files downloaded from the UNAVCO website are used to calculate the TEC on GPS measurements only. The study shows the increase and decrease in TEC during the event days. The increase or decrease in percentage TEC is compared to a reference quiet day. Among 49 selected storms in 26 stormy days the TEC has increased and in 23 stormy days the TEC has decreased. The maximum deviation in TEC is found during the recovery phase geomagnetic storm of 2010-08-04 and 2012-07-16. During storm on 2010-08-04 it is 101.97% increase and during storm of 2012-07-16 it is 50.68% decrease. The outcomes of this study enhance the understanding of ionospheric dynamics over Nepal under geomagnetically disturbed conditions.