The United States Geological Survey reports a major, preliminary magnitude 7.5 earthquake struck in the South Atlantic Ocean, prompting Chilean authorities to issue an advisory for a potential tsunami along parts of Antarctica.

A strong earthquake struck the Drake Passage region on Thursday (local time), according to the US Geological Survey (USGS), which downgraded the intensity of the quake from magnitude 8 to 7.5.While the US tsunami warning system did not issue any alert after the Drake Passage earthquake,