People gather outside their apartments to avoid aftershocks of a quake, in southwest China's Chongqing Municipality, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of neighboring Sichuan Province, also in southwest China, at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. (Xinhua/Chen Ling)

People gather outside their apartments to avoid aftershocks of a quake, in Shifang City of southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of Sichuan Province at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. (Xinhua/Zhang Xiaoli)

Students gather outside their teaching buildings to avoid aftershocks of a quake, in Dazhou City of southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of Sichuan Province at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. (Xinhua/Deng Liangkui)

People stay outside a restaurant to avoid aftershocks of a quake, in Shifang, southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of Sichuan Province at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. Multiple aftershocks jolted the area after the 7.0 magnitude quake took place, the largest aftershock in magnitude being the 5.1-magnitude one which shook the bordering area of Lushan and Baoxing counties of Sichuan at 8:07 a.m.(Xinhua/Zhang Xiaoli) 

People gather at the Dazhong Square to avoid aftershocks of a quake, in southwest China's Chongqing Municipality, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of neighboring Sichuan Province, also in southwest China, at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. (Xinhua/Ruan Shoujun) 

Students are arranged to stay on a palyground to avoid aftershocks of a quake, in Dazhou, southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of Sichuan Province at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. Multiple aftershocks jolted the area after the 7.0 magnitude quake took place, the largest aftershock in magnitude being the 5.1-magnitude one which shook the bordering area of Lushan and Baoxing counties of Sichuan at 8:07 a.m.(Xinhua/Deng Liangkui)

Citizens stay outside their apartments to avoid aftershocks of a quake, in Chengdu, capital of southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Lushan County of Sichuan Province at 8:02 a.m. Beijing Time (0002 GMT) on Saturday, according to the China Earthquake Networks Center (CENC). The epicenter, with a depth of 13 kilometers, was monitored at 30.3 degrees north latitude and 103.0 degrees east longitude. Residents in Chengdu felt the earthquake. Multiple aftershocks jolted the area after the 7.0 magnitude quake took place, the largest aftershock in magnitude being the 5.1-magnitude one which shook the bordering area of Lushan and Baoxing counties of Sichuan at 8:07 a.m. (Xinhua/Wei Dezhi)