What to know about Venezuela's magnitude 7.2 and 7.5 "doublet" 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.

Homes and buildings collapse in first magnitude 7.1 earthquake, with tremors felt in neighbouring Colombia

The quakes are among the strongest to strike Venezuela in more than a century