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<p>The continent of Antarctica remains isolated from anthropogenic activities occurring in the other parts of the globe. It is considered the ideal location for studying natural phenomena such as earthquakes and their aftermath. An earthquake swarm took place between November 16 and 18, 2013 (DOY 320 to 322) in the South Scotia Sea, leading to atmospheric disturbances in the surrounding region. Changes in atmospheric parameters and Zenith Total Delay (ZTD) were observed over parts of East Antarctica and Antarctic Peninsula, which are closer to Scotia sea region. Specifically, variations in ZTD were detected at GNSS stations PALM, SYOG, and MAW1 on the continent. A notable decrease in ZTD was recorded at stations near the earthquake swarm, along with significant atmospheric pressure fluctuations in various locations in Antarctic Peninsula and East Antarctica. The average precipitable water vapor (PWV) rose from 4.0&#xa0;mm to 4.5&#xa0;mm with a maximum of 9.9&#xa0;mm, at SYOG station at East Antarctica, pressure decreased 21&#xa0;hPa and temperature increased. The SST attaining 3&#xa0;°C above the climatological averages of the western South Atlantic Ocean. Conversely, stations in the western Antarctica and certain areas of eastern Antarctica away from Scotia sea region (such as MCM4, DAV1, CAS1, and DUM1 remained unaffected. This indicates an atmospheric connection between the earthquake swarms in the ridges of the Scotia Sea and the atmosphere over Antarctica closer to Scotia sea during the seismic event.</p>

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The Impact of Earthquake Swarms Occurred in the South Scotia Sea over Antarctica and South America

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • A. Akilan,
  • H. Schuh,
  • C. Varun,
  • G. G. Krishna Teja,
  • Sravan Kumar Kotluri,
  • T. T. Charan,
  • M. Satyanarayanan,
  • H. V. S. Satyanarayana

摘要

The continent of Antarctica remains isolated from anthropogenic activities occurring in the other parts of the globe. It is considered the ideal location for studying natural phenomena such as earthquakes and their aftermath. An earthquake swarm took place between November 16 and 18, 2013 (DOY 320 to 322) in the South Scotia Sea, leading to atmospheric disturbances in the surrounding region. Changes in atmospheric parameters and Zenith Total Delay (ZTD) were observed over parts of East Antarctica and Antarctic Peninsula, which are closer to Scotia sea region. Specifically, variations in ZTD were detected at GNSS stations PALM, SYOG, and MAW1 on the continent. A notable decrease in ZTD was recorded at stations near the earthquake swarm, along with significant atmospheric pressure fluctuations in various locations in Antarctic Peninsula and East Antarctica. The average precipitable water vapor (PWV) rose from 4.0 mm to 4.5 mm with a maximum of 9.9 mm, at SYOG station at East Antarctica, pressure decreased 21 hPa and temperature increased. The SST attaining 3 °C above the climatological averages of the western South Atlantic Ocean. Conversely, stations in the western Antarctica and certain areas of eastern Antarctica away from Scotia sea region (such as MCM4, DAV1, CAS1, and DUM1 remained unaffected. This indicates an atmospheric connection between the earthquake swarms in the ridges of the Scotia Sea and the atmosphere over Antarctica closer to Scotia sea during the seismic event.