The official Xinhua News Agency says the epicenter of the 1:13 a.m. quake was in an unpopulated area about 33 kilometers (20 miles) from the county seat of Menyuan in Qinghai province.
The agency quoted local officials as saying the quake caused cracks in about 20 homes and other damage in more than 30 others. Authorities sent 700 tents to the area.
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