Magnitude 6.2 earthquake — Scotia Sea

A magnitude 6.2 earthquake struck the Scotia Sea at 08:22 UTC on 22 August 2026, according to the United States Geological Survey (USGS). The quake was centred at approximately 60.38°S, 47.60°W, roughly 150km west of the South Orkney Islands, in the remote stretch of ocean between the southern tip of South America and Antarctica. USGS recorded the depth at 10km, and its moment tensor analysis indicated a predominantly strike-slip rupture, consistent with the tectonics of the South Scotia Ridge, a transform boundary where the Scotia and Antarctic plates grind past one another. The agency assigned the event a green alert level, its lowest category, denoting minimal expected impact.

The region is sparsely populated and largely uninhabited, and no felt reports were logged with USGS at the time of writing, reflecting the earthquake's remoteness from any significant population centre. No tsunami warning was issued for the event. USGS said the solution was well constrained, drawing on 66 seismic phases from monitoring networks, and gave the earthquake a significance score of 591, a measure that weighs magnitude, felt reports and other factors to gauge overall newsworthiness. The Scotia Sea and the surrounding South Sandwich and South Orkney island chains sit along one of the most seismically active plate boundaries in the Southern Hemisphere, and earthquakes of this scale occur there periodically without widespread consequence given the area's isolation.