Tag: Longmenshan fault line

Shifting tectonic plates, aftershock, dam-related, or all three?

(April 22, 2013) Experts are debating whether the 7.0-magnitude earthquake that struck Sichuan province over the weekend was an aftershock of the region’s deadly 2008 Wenchuan earthquake – both quakes occurred along the same fault line. Some attribute Saturday’s event to natural movement in the earth’s crust but according to Fan Xiao, chief engineer at the Sichuan Bureau of Geology and Mineral Resources, the Wenchuan quake is also linked to the nearby Zipingpu Dam reservoir. Speaking to the Global Times, Mr. Fan said large reservoirs built on fault lines can induce earthquakes caused by the pressure of massive water volume on a fracture. “A reservoir with a capacity of over 1 billion cubic meters and a dam more than 100 meters tall would have a 30 percent to 40 percent chance of inducing an earthquake,” he said.