Strong and shallow M6.6 earthquake hits Scotia Sea

The epicenter was located roughly 300 km (187 miles) east of the Base Orcadas, an Argentinian scientific station in Antarctica, and 710 km (441 miles) south of South Georgia and the South Sandwich Islands.

Based on earthquake information and historic tsunami records, the earthquake is not expected to generate a tsunami, the NWS National Tsunami Warning Center said.

The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

There are likely to be no affected structures in this region.

Estimated population exposure to earthquake shaking

Regional seismicity

References:

¹ M6.6 earthquake Scotia Sea – USGS – June 28, 2025

² M6.6 earthquake Scotia Sea – EMSC – June 28, 2025

Rishav Kothari

Rishav Kothari is Editor-in-Chief of The Watchers, where he runs the newsroom and covers earthquakes, volcanoes, severe weather and space weather.

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