A significant magnitude 7.5 earthquake struck the Drake Passage on August 21, 2025, triggering tsunami alerts for Chile's coast. The passage, a crucial waterway between South America and Antarctica, is known for its turbulent waters and active tectonics.

A major, preliminary magnitude 7.5 earthquake struck in the South Atlantic Ocean late Thursday, the United States Geological Survey reported.

The United States Geological Survey (USGS) revised down the quake magnitude, initially reported at 8, adding that it hit at a depth of 11 km (7 miles).