(CNN) -- An earthquake with a magnitude of 7.6 struck off the coast of Costa Rica Wednesday, the U.S. Geological Survey said.
The quake was recorded on the Costa Rican Pacific coast, about 95 miles west of the capital, San Jose, and ran more than 28 miles deep.
The epicenter was just five miles away from the city of Samara.
The quake was initially measured at a 7.9 magnitude, but additional measurements by the USGS indicated the magnitude at 7.6.
A tsunami watch remained effect for much of the Caribbean, including along the coastlines of Brazil, Mexico, most countries in Central America and many islands.
"Earthquakes of this size have the potential to generate a widespread destructive tsunami that can affect coastlines across the Caribbean region," the U.S. government said.