2013_Dingxi_earthquake
2013 Dingxi earthquakes
Very strong fatal earthquakes in Gansu province, China
On 22 July 2013, a series of earthquakes occurred in Dingxi, Gansu. The first quake struck at 07:45 China Standard Time with an epicenter located at the border of Min County and Zhang County.[1] The magnitude of the initial earthquake was placed at Ms 6.6 by the China Earthquake Data Center with a focal depth of 20.0 kilometres (12 mi).[1] It was measured at Mw 5.9 by the United States Geological Survey (USGS)[2] and Mw 6.0 by the European Alert System.[3] Another strong quake occurred about one hour later, measuring 5.6 magnitude by the USGS.[5] As of 18:00 CST (10:00 UTC), 22 July 2013, 422 aftershocks had been recorded.[6] The earthquakes were also felt in the nearby cities of Tianshui and Lanzhou in Gansu, as well as Xi'an, Baoji, and Xianyang in neighbouring Shaanxi.[6]
As of 23:00 CST, 23 July 2013, the earthquakes had caused at least 95 deaths, and more than 2,300 people were injured.[6]