A strong, long 7.4-magnitude earthquake with an epicenter in Guerrero state shook central southern Mexico and swayed buildings in Mexico City Tuesday. It was followed by a 4.8-magnitude aftershock, according to Mexico's national seismological agency.

The U.S. Geological Survey set the intensity of the first quake at 7.4 and said the epicenter was 11 miles underground. Mexico's National Seismological Survey said the trembler had an epicenter southwest of Ometepec in Guerrero state.

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