On Wednesday evening, Venezuela was hit with its largest tremors in more than a century — toppling buildings and claiming more than 100 lives. The event, according to the US Geological Survey, was a rare phenomenon called a “doublet” that contained not one but two major earthquakes.

A 7.2-magnitude earthquake and a 7.5-magnitude were less than a minute apart, said the U.S. Geological Survey. The second earthquake was the largest to hit the country since 1900.

Two powerful earthquakes of magnitude 7.2 and 7.5, about 39 seconds apart, struck north-central Venezuela on Wednesday afternoon, collapsing buildings in the capital, Caracas, and…