Category: Dams and Earthquakes

Yunnan earthquake raises fears on hydropower projects

Geologists express concerns that massive hydropower construction in the region may have contributed to seismic activity. Beijing-based media group, Caixin, interviews Chinese geologist Fan Xiao whose research supports a link between Yunnan’s 6.5-magnitude earthquake in early August and the filling of dam reservoirs in the area.

Quake strikes Three Gorges Dam area again

(May 28, 2014) Another earthquake has struck the Three Gorges Dam reservoir region in central China’s Zigui County. No casualties have been reported so far and officials say the dam is operating normally. The 3.4 magnitude tremor which hit early Monday morning, some 23 km from the dam, follows two earthquakes of magnitude above 4.0 and hundreds of aftershocks which shook the same region in late March of this year. The events rank as significant according to Chinese geologist and environmentalist Fan Xiao, who says they are signals that the seismic threat posed by Three Gorges Dam is at its most critical stage now.

The probe of Three Gorges officials is getting too close for Communist Party leaders

(April 21, 2014) China’s roving corruption crackdown has uncovered nepotism, shady property deals and dodgy bidding procedures at the country’s state-owned Three Gorges Dam operator, Three Gorges Corporation. The news has reignited public anger over a project funded by a special levy paid for by Chinese citizens and has sparked speculation that President Xi Jinping is using Three Gorges as a way to target two of China’s biggest “tigers”.

More quakes linked to mega-dams

(April 9, 2014) Another earthquake has struck China’s seismically hazardous southwestern region in the same vicinity as one of the country’s mega-dams. Chinese geologist and environmentalist Fan Xiao says there is a “high probability” the Xiluodu dam, China’s second and the world’s third biggest hydropower power plant, triggered the quake.

Three Gorges Dam triggers frequent seismic activities

(April 7, 2014) Chinese geologist and environmentalist Fan Xiao says the recent quakes that struck central China’s Hubei Province in Zigui county — “the first county of the Three Gorges Dam” due to its proximity to the project site — signal that the seismic threat posed by Three Gorges Dam is at its most critical stage now. Reservoir-induced seismicity (RIS) is most likely to occur within a few years, even a decade after initial filling of a dam reservoir to its highest level, due to the time it takes for reservoir water to penetrate deep into seismic faults and fissures before it triggers seismic activity. A 2010 study revealed seismic monitors around the Three Gorges Dam reservoir and in Hubei Province registered 3,429 earthquakes between June of 2003 (when inundation of the reservoir began) and December 31, 2009: a 30-fold increase in seismic frequency over the pre-dam period.

More earthquakes strike Three Gorges Dam region

(April 1, 2014) A magnitude-4.7 earthquake hit Zigui county in central China’s Hubei Province last Sunday, around 23 kilometres from the Three Gorges Dam site location, several days after a magnitude-4.3 tremor was felt early Thursday morning about 30 kilometres from the dam. Authorities say the dam was not affected but they are monitoring the situation. There have been no reports of casualties or property damage, although news coverage has noted an increase in Chinese experts who support the speculation that the project itself is the cause of local seismic activity.

Three Gorges Dam not affected by tremor

(March 28, 2014) Once again, an earthquake has hit the Three Gorges reservoir area and dam officials are reassuring the public that the world’s largest hydropower plant is operating normally. The epicenter of a 4.3-magnitude earthquake struck Zigui County, just 30 km from the Three Gorges Dam at 12:20 a.m. March 27, 2014. Stay tuned while Probe International investigates the cause and effect of this latest tremor.