President Felipe Calderon, in a message posted on Twitter, said no major damage had been detected and there were no reports of casualties. The quake, which was originally estimated by the U.S. Geological Survey to have a 7.9 magnitude, struck 200 miles southeast of the capital in Oaxaca state.

Some houses collapsed and around 500 were damaged along the Pacific Ocean coastline in southern Guerrero state near the quake’s center, state Governor Angel Aguirre said in an interview broadcast on Milenio TV. No deaths or injuries have been reported nor has any damage been detected in the resort city of Acapulco, he added.