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A very strong magnitude 6.6 earthquake occurred in the South Atlantic Ocean 298 km (185 mi) from Antarctica on Sat, Jun 28, 2025 at 08:32 GMT.

The depth of the quake could not be determined, but is assumed to be shallow.

The quake was not felt (or at least not reported so).

Earthquake details

Date & time Jun 28, 2025 08:32:21 UTC
Local time at epicenter Saturday, Jun 28, 2025, at 08:32 am (Universal Time GMT +0)
Status confirmed (manually revised)
Magnitude 6.6
Depth 10 km
Primary data source USGS (United States Geological Survey)