The USGS is reporting that A powerful 7.4-magnitude earthquake has shaken the southern Atlantic Ocean early Friday with an epicenter 195 miles (316 kilometers) from islands hosting a British Antarctic research station. There was no immediate tsunami warning.

The quake struck at 5:32 am local time (0732 GMT) at a depth of 10 kilometers. It was centered east-southeast of the British-administered South Georgia and South Sandwich Islands.


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