BUENOS AIRES, Argentina (AP) — 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. There were no evacuation orders immediately declared for Chile or Argentina, the two countries closest to the quake.

The temblor happened at 11:16 p.m. local time in Argentina about 710 kilometers (441 miles) southeast of Ushuaia, Argentina, in the Drake Passage, according to the U.S. Geological Survey. The earthquake had a preliminary depth of 10.8 kilometers (6.7 miles).

The Drake Passage connects the South Atlantic and South Pacific oceans between the southern tip of South America and the Antarctic Peninsula.

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