A magnitude 6 earthquake rocked Pakistan on Sunday, 15 days after a 7.6 magnitude quake killed 53,000 people, Reuters reported. There were no immediate reports of any casualties or damage. The U.S. Geological Survey said on its Web site the 6 magnitude quake struck at 1504 GMT, with an epicentre near the town of Mingaora, in North West Frontier Province. The quake was felt in various cities including the capital, Islamabad. A Pakistani meteorologist said the quake had a magnitude of 5.9 and the epicentre was in the same area as the Oct. 8 earthquake, in Pakistani Kashmir, adjacent to North West Frontier. "We're calling it an aftershock," said the Pakistani official, Mohammad Hanif. Pakistan has been hit by numerous aftershocks since the Oct. 8 quake, which experts say is a good sign as they release pressure building up underground.