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    Wednesday, February 11, 2009

     

    Earthquakes - Humans Can Cause

    How Humans Can Trigger Earthquakes



    http://news.nationalgeographic.com/news/2009/02/photogalleries/humans-cause-earthquakes/index.html

    PHOTOS: Four Ways Humans Can Trigger Earthquakes

    PHOTOS: How Humans Can Trigger Earthquakes

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    February 10, 2009-- A massive earthquake leveled buildings--including swaths of the town of Yingxiu, seen above on May 26, 2008--and killed roughly 80,000 people in China's Sichuan Province in May 2008. A new study says that yo-yoing weight of water behind China's Zipingpu Dam could be to blame for the magnitude 7.9 earthquake.

    The Sichuan quake is only the latest in a swarm of possibly human-influenced earthquakes that experts say have struck in the past 60 years.

    What follows are some of the ways scientists think human activities can trigger temblors.

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