A powerful 7.5 magnitude earthquake struck the Drake Passage, the remote stretch of ocean between South America and Antarctica, shaking the Earth beneath the icy waters. Initially reported as an 8.0 quake,

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