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An emergency-response plan has been initiated by the China Earthquake Administration.
A 6.6 magnitude quake jolted the junction of the Minxian County and Zhangxian County at at 7:45 a.m. Beijing Time.
The epicentre, with a depth of 20 km, is 170 km away from the provincial capital Lanzhou, according to the administration.
A 5.6 magnitude quake jolted the same area later at 9:12 a.m.