MEXICO CITY (Reuters) - A 7.5 magnitude quake shook southern Mexico on Friday, a prolonged rumble that rocked buildings across the capital Mexico City. The epicenter was close to the Pacific coast in the southern state of Oaxaca and had a depth of 26.7 miles (43 km), according to the U.S. The area is already reeling from an earthquake that caused widespread damage in September. Oaxaca’s civil protection service said no damage had been reported so far.