Mexico City ( CNN ) -- A powerful earthquake with a preliminary magnitude of 6.3 struck southern Mexico on Monday , the U.S. Geological Survey said . The quake 's epicenter was about 17 miles ( 27 kilometers ) from Ometepec , Guerrero . It was about 7.6 miles ( 12 kilometers ) deep , the USGS said . There were no immediate reports of damage or injuries . Officials described the quake as an aftershock of the 7.4-magnitude temblor which struck in the same area on March 20 , damaging hundreds of homes . There have been 280 aftershocks since that quake , Mexico 's National Seismological Survey reported . Residents felt Monday 's quake in Mexico City , hundreds of miles from the epicenter . There were no initial reports of major damage in the capital , Mayor Marcelo Ebrard said on Twitter . The USGS describes Mexico as one of the most seismically active areas of the world . The country sees an average of seven earthquakes daily with a magnitude greater than 3.0 , according to Mexico 's National Seismological Service . CNN 's Krupskaia Alis , Rafael Romo and Sean Morris contributed to this report .
Mexico : The earthquake is an extension of a larger quake that occurred March 20 . The earthquake 's epicenter was about 100 km from Ometepec , Guerrero . There are no immediate reports of injuries or major damage . Residents in Mexico City felt the earthquake .