The China Earthquake Networks Center said the epicenter was about, 2 1/2 miles deep, China's state-run Xinhua news agency reported.
Officials said the earthquake occurred in a sparsely populated area in the Dachaidan district in the Mongolian-Tibetan autonomous prefecture.
Xinhua said coal miners working near the epicenter were evacuated to safety.
Megyn Kelly: Santa Claus and Jesus are both white men
Wisconsin business offering 'therapeutic cuddling' forced to close