Mexico - An earthquake with a 6.2 magnitude struck off Mexico's Pacific coast on Saturday, the U.S. Geological Survey said.

The epicenter of the quake, which occurred at 4:53 a.m., was centered about 305 km (190 miles) southwest of the resort city of Puerto Vallarta and 259 kilometers (160 miles) southwest of the town of Tomatlan in the Mexican state of Jalisco, at a depth of 6.2 miles (10 km).

There were no reports of damage in the state, the head of Mexico's emergency services tweeted after the tremor.

Mexico, one of the countries with the highest levels of seismic activity in the world, sits on the North American tectonic plate and is surrounded by three other plates in the Pacific: the Rivera microplate at the mouth of the Gulf of California; the Pacific plate; and the Cocos plate. The Cocos tectonic plate stretches from Colima state south and has the potential to cause the most damage since it affects Mexico City, which is located in the center of the country, has a population of 20 million, and was constructed over what was once Lake Texcoco.

The magnitude-8.1 earthquake that hit Mexico City on Sept. 19, 1985, was the most destructive to ever hit Mexico, killing some 10,000 people, injuring more than 40,000 others and leaving 80,000 people homeless.

The most recent powerful quake to hit Mexico was a magnitude-7.6 temblor that rocked Colima on January 21, 2003.