Strong M6.2 earthquake strikes South Sandwich Islands region

An earthquake with a magnitude of M6.2 was recorded in the South Sandwich Islands region at 23:46 UTC on September 2, 2026. According to USGS, the event occurred at a depth of 125.9 km (78.2 miles), with the epicenter located at coordinates 27.9°S, 56.2°W.

The location of the quake places it in the remote South Sandwich Islands area, a sparsely populated volcanic island arc in the southern Atlantic Ocean. There are no major settlements in the direct vicinity, and the nearest landmasses are the uninhabited islands and extensive open ocean around them.

Given the region’s geography, the closest critical infrastructure would be maritime routes transiting the southern Atlantic. The area is devoid of airports, ports, or large energy facilities due to its remoteness.

There is no tsunami threat associated with this earthquake, based on its location and available data.

The significance index is 591 (on a scale that runs through 1 000), based on magnitude, felt reports, and estimated impact.

The South Sandwich Islands region is tectonically active, lying on the boundary between the South American Plate and the small South Sandwich Plate. This zone is known for frequent subduction-related seismicity and occasional major events at intermediate to deep depths.

This information was last updated at 00:01 UTC on September 3, 2026.