Updated at 9:45 p.m. ET
A powerful 7.7-magnitude earthquake struck off the coast of Jamaica, Cuba and the Caymans on Tuesday, startling people as far away as Miami and prompting official tsunami alerts for a large area of the Caribbean that were later withdrawn.
The quake, initially reported as 7.3-magnitude before being upgraded, was centered 86 miles northwest of Montego Bay, Jamaica, and 87 miles west-southwest of Niquero, Cuba, at a depth of just 6 miles, according to the U.S. Geological Survey. It struck at 2:10 p.m. ET.