An earthquake measuring 4.9 on the Richter scale jolted Ruoqiang County in northwest China's Xinjiang Uygur autonomous region at 9:34 am Saturday (Beijing Time), according to the China Earthquake Networks Centre The epicenter, with a depth of 6 km, was monitored at about 38.3 degrees north latitude and 89.5 degrees east longitude, the centre said in a statement carried by the New China News Agency (Xinhua).(