An earthquake measuring 5.5 on the Richter scale has jolted Yutian County in Hotan Prefecture in northwest China\'\'s Xinjiang Uygur Autonomous Region, said the China Earthquake Networks Center earlier this morning. The epicenter, with a depth of 6 km, was determined to be at 36.4 degrees north latitude and 82.4 degrees east longitude, according to Xinhua news agency.