Inbuced Seismicity and Sichuan Provence Earthquakes.

(Picture from BBC)

Because I have, in a sense, a vested interest in what goes on in China I am following the news items that deal with the earthquake in Sichuan Province with great interest. 80,000 people may have lost their lives the Chinese government says, 350 dams are at risk and new lakes formed by mudslides may break at any moment…the loss of life from that would be enormous. The latest aftershock weighing in at 6.o caused high rises in Beijing to sway.

When the Three Gorges dam project on the Yangzhe River began several year ago the world began talking about the enormous implication of gathering so much water in one place. The earth, they said, would actually sink in the region. Now, does the earth quakes in China have some connection to the Tree River Gorge dam ? I think so. Wikipedia calls the effect of such large bodies of water on earth quake activity “induced seismicity”. And it seems researcher that contribute to Wikipedia think there is a connection too.

“The mass of water in a reservoir alters the pressure in the rock below, which can trigger earthquakes. Reservoir-induced seismic events can be relatively large compared to other forms of induced seismicity. The filling of the Katse Dam in Lesotho, and the Nurek Dam in Tajikistan is an example.[1]. In Zambia, Kariba Lake may have provoked similar effects. Some experts worry that the Three Gorges Dam in China may cause earthquakes and the proximity of the epicenter of the 2008 Sichuan earthquake to the dam suggests a potential correlation. Seismic activity was predicted in the area independent of the construction of the dam by Recent Developments in World Seismology.”

Just some more Sunday ramblings. Hope your holiday, if you are from USA, is going great. All is well here at the Torris household. Rainy cool but oh so very, very green here in Oregon.

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One thought on “Inbuced Seismicity and Sichuan Provence Earthquakes.

  1. well it makes perfectly good sense to me.. i live like 2 miles off the san andreas fault here in california… live on one side,, work on the other… so if the big one comes over here,, i will more than likely be in the hole or in the ocean… oh well… i guess we all gotta be somewhere……

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