BEIJING, March 17 (Xinhua) -- A 5.1-magnitude earthquake jolted Sunan County of Zhangye City, northwest China's Gansu Province at 8:26 a.m. Thursday Beijing Time, according to the China Earthquake Networks Center (CENC).

The epicenter was monitored at 39.02 degrees north latitude and 97.66 degrees east longitude, at a depth of 9 km, the CENC said.