Back-to-back major earthquakes rattle Venezuela as USGS warns high casualties are likely

Two major earthquakes occurred in Venezuela on Wednesday, resulting in the issuance of a rare red alert by the U.S. Geological Survey for shaking-related fatalities and economic losses.

An initial magnitude 7.2 earthquake was the first event in a doublet, and was followed roughly 39 seconds later by a larger 7.5 mainshock.

"High casualties and extensive damage are probable, and the disaster is likely widespread," the USGS red alert statement said.

The U.S. Geological Survey (USGS) said that a magnitude 7.2 earthquake struck at 6:04 p.m. ET, with its epicenter about 15 miles east-northeast of San Felipe, Venezuela, at a depth of about 13.6 miles.

A second major earthquake struck just seconds later, according to the USGS. The magnitude 7.5 quake occurred at 6:05 p.m. ET, with its epicenter about 14 miles southeast of Yumare, Venezuela, at a depth of approximately 6 miles.

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The second-highest shaking level rated by the USGS, classified as "violent," was reported in the city of San Cabello, with a population of 209,000.

According to the USGS, past red alerts have required a national or international response.

The National Weather Service Tsunami Warning Center initially warned that there was a tsunami threat to Puerto Rico and the Virgin Islands of sea level fluctuations and strong ocean currents that could be hazardous along coasts and beaches.

The tsunami warnings were canceled in a later advisory issued at 7:12 p.m.

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According to NWS tsunami forecasts, wave heights affecting Puerto Rico and the U.S. Virgin Islands are expected to remain below 1 foot.

This is a developing story. Check back with FOX Weather for the latest.