MEXICO CITY (CNN) -- A 7.6-magnitude earthquake hit Mexico Tuesday, the U.S. Geological Survey said.
The earthquake's epicenter was about 15 miles (25 km) east of Ometepec, Guerrero, the agency said, and its depth was about 11 miles (17 km).
The agency earlier reported the magnitude of the quake at 7.9, but later revised that figure.
Residents rushed into the streets after feeling the temblor in Mexico City.
Tourists and residents also felt the earthquake in the resort city of Acapulco.
Mexican President Felipe Calderon said in a Twitter post that there were no immediate reports of serious damage.
In Mexico City, Mayor Marcelo Ebrard sent tweets saying that there was no visible damage in the capital and that the sprawling city's strategic services and water system were functioning. Regardless, he tweeted, numerous buildings were being evacuated.