A magnitude 6 earthquake rocked Pakistan on Sunday, 15 days after a 7.6 magnitude quake killed 53,000 people. There were no immediate reports of any casualties or damage. The US 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.