Category: RIS

Deadly earthquake in China may be aftershock of 2008 Wenchuan quake

(April 21, 2013) The strong earthquake that struck China’s mountainous Sichuan province Saturday morning may have been an aftershock, says prominent Chinese geologist, Fan Xiao. The accumulation of stress had not yet been fully released, making this region a more dangerous area after the May 2008 Wenchuan earthquake.

On alert: RIS risk amid rash of earthquakes in China’s Sichuan-Yunnan region

(March 22, 2013) A new report, exclusive to Probe International, calls for urgent monitoring of China’s large dams in areas prone to seismic hazard. These areas may be at increased risk from dam reservoir-induced seismicity (RIS). Scientists have observed that reservoir impoundment may not only increase the risk of strong earthquakes, particularly in areas already vulnerable to high-intensity seismic activity, but may represent a more pronounced risk in the first few years after a dam is filled.

Trouble on the Yangtze

(December 19, 2012) A central government plan to dramatically increase China’s reliance on non-fossil fuels will derive two-thirds of that target from hydropower – “an increase on par with adding nearly one Three Gorges Dam a year,” reports Jane Qiu for Science magazine. In her article on over-development of the country’s river pulse, the once mighty Yangtze, Qiu looks at the threat China’s damming fever poses to river habitats and species, the calamity potential of dam construction in quake-prone regions and mounting criticism of China’s biased environmental impact assessment process.

Mega-dams in China’s earthquake zones could have “disastrous consequences”

(October 31, 2012) “Earthquake Hazards and Large Dams in Western China,” the Probe International report authored by geologist John Jackson, has set China’s academic and industry circles astir. As the debate over Jackson’s findings heats up, the respected Caixin Media magazine, New Century Weekly, looks at both sides of the debate and the specific issues Jackson’s explosive report has raised.

Mapping disaster

(September 14, 2012) This spring, Probe International used the power of hazard mapping to assess the risks of China’s breakneck dam-building along its western rivers. Now, a new study published by the international scientific journal Tectonophysics discusses how flawed hazard maps may have underestimated such risks and been partly to blame for the devastation caused by the 2011 Japan, 2010 Haiti and 2008 China earthquakes.

Seismic signs

(September 5, 2012) Probe International has been at the forefront of research on the connection between seismic activity and large-dam construction, focusing on examples in China such as the Zipingpu Dam, which is thought to have triggered the deadly 2008 Sichuan earthquake. Now, a new article by U.S.-based quake warning advocate, David Nabhan, calls for a rethink of seismic forecasting in North America that draws on connections so often overlooked: specifically, the trigger effect of dams, and the impact of lunar and solar gravitational tides on earthquake activity.

Dam madness

(July 4, 2012) As the fierce struggle between China’s hydropower industry and environmental conservationists rages anew, what has become clear in the meanwhile: the country’s rivers cannot sustain the current pace of development.