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

Akilan A, Schuh H, Varun C, Akilan A, Schuh H, Varun C, Teja GGK, Kotluri SK, Charan, TT, Satyanarayanan M, Satyanarayana, HVS.

PURE AND APPLIED GEOPHYSICS

doi:10.1007/s00024-026-03932-1 

An earthquake swarm in the South Scotia Sea (16-18 November 2013) caused localized atmospheric changes over nearby Antarctica. GNSS stations (PALM, SYOG, MAW1) recorded decreased ZTD, pressure fluctuations, rising temperatures, and increased PWV at SYOG. Sea surface temperatures were ~3°C above normal. Distant stations showed no impact, indicating a regional effect. The event may be linked to atmospheric changes and drought conditions in parts of South America during the 2014 austral summer.

Fig: Cartoon illustrating the link between the magma movements with earthquake swarm at Scotia Ridge and the snowfall at Antarctica and heat wave conditions in South America during 2013 14 Austral summer.

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