A historically strong earthquake struck off Cuba's northwest coast on Monday, according to official reports, shaking parts of Cuba, Mexico and ​Florida that are typically not prone to quakes.

The U.S. Geological Survey (USGS) measured ‌the quake at a magnitude 6.1 at a shallow depth of 26 km (16 miles) and its epicenter 104 km west-northwest of Mantua, Cuba, about two to four hours by car from the ​capital Havana.