SAN JOSE, Costa Rica, Sept. 5 (UPI) -- A 7.6 magnitude earthquake struck off the coast of Costa Rica Thursday, setting off a tsunami watch for much of the Caribbean, U.S. scientists said.
The U.S. Geological Survey said the preliminary 7.9 magnitude quake was recorded about 95 miles west of San Jose, the Costa Rican capital, and ran more than 28 miles deep.
The tsunami watch was in effect for the coastlines of Brazil, Mexico, most countries in Central America and many islands, the USGS said.
"Earthquakes of this size have the potential to generate a widespread destructive tsunami that can affect coastlines across the Caribbean region," the U.S. agency said in a statement.
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