Quake shakes Mexicans out of bed, alarms sound in capital
The quake hit 32 km (20 miles) east of Santa Catarina Mechoacan in the state of Oaxaca at a depth of 40 km at 12:57 a.m. (0657 GMT), the U.S. Geological Survey said, revising its strength down slightly from an initial 6.1 magnitude.
Many in Mexico City slept through the shaking. Residents who rushed into the streets when the alarms sounded quickly returned to their homes once the quake stopped.
The head of Mexico's civil protection agency, Luis Felipe Puente, said state emergency procedures had been activated in the affected states.
"So far, no damage has been reported," he said on Twitter.
Infrastructure, including installations of state oil company Pemex, were intact, he said.
Mexico has suffered a series of more powerful earthquakes in recent months, including two in September that together killed hundreds of people and brought buildings crashing down. ■