An earthquake measuring 5.0 on the Richter scale jolted Xigaze in southwest China"s Tibet Autonomous Region Friday morning, Xinhua quoted the national seismological network as saying. The quake struck at 10:22 a.m. Beijing time. With a depth of about 10 km, the epicenter was detected as 30.9 degrees north latitude and 84.0 degrees east longitude in Zhongba County. No injuries or deaths have been reported.