An earthquake measuring 5.9 on the Richter scale rocked northwest China's Gansu province Saturday evening, the State Seismological Bureau announced.
The quake occurred at 9:27 p.m. Beijing time at Yumen city, at latitude 39.8 degrees north and longitude 97.3 degrees east and a strong tremor was felt in the city.
So far no casualties had been reported and the provincial seismological bureau of Gansu had sent officials to the quake site,said a bureau statement.