Photos: 6.6-magnitude quake hits NW ChinaBackgrounder: Recent major strong earthquakes worldwidePhoto taken on July 22, 2013 shows a damaged house in quake-hit Majiagou Village of Minxian County, northwest China's Gansu Province. Fifty-four deaths have so far been confirmed in the 6.6-magnitude earthquake which jolted a juncture region of Minxian County and Zhangxian County in Dingxi City Monday morning. (Xinhua/Tu Guoxi) 
 

Photo taken on July 22, 2013 shows a damaged house in quake-hit Majiagou village of Minxian county, Northwest China's Gansu Province. A 6.6-magnitude earthquake jolted a juncture region of Min county and Zhang county in Dingxi Monday morning. (Xinhua/Tu Guoxi)

Photo taken with a mobile phone shows a damaged house in quake-hit Minxian county, Northwest China's Gansu Province, July 22, 2013. At least three people were killed in the 6.6-magnitude earthquake which jolted a juncture region of Minxian county and Zhangxian county in Dingxi Monday morning. (Xinhua)

Photo taken with a mobile phone shows a damaged house in quake-hit Meichuan Town of Minxian county, Northwest China's Gansu Province, July 22, 2013. At least three people were killed in the 6.6-magnitude earthquake which jolted a juncture region of Minxian county and Zhangxian county in Dingxi city Monday morning. (Xinhua/Kang Yapeng)

Photo taken with a mobile phone shows a damaged house in quake-hit Minxian county, Northwest China's Gansu Province, July 22, 2013. At least three people were killed in the 6.6-magnitude earthquake which jolted a juncture region of Minxian county and Zhangxian county in Dingxi city Monday morning. (Xinhua)

 Photo taken with a mobile phone shows a damaged house in quake-hit Minxian county, Northwest China's Gansu Province, July 22, 2013. At least three people were killed in the 6.6-magnitude earthquake which jolted a juncture region of Minxian county and Zhangxian county in Dingxi city Monday morning. (Xinhua)