Do human beings sometimes cause earthquakes? YES THEY DO.

“‘Yes, human engineering has been triggering earthquakes for more than half a century,’ said Leonardo Seeber, Lamont research professor at the Lamont-Doherty Earth Observatory, and manmade quakes may be more common than is acknowledged….humans tend to do it in two ways. One is by changing the load on the crust, typically with artificial lakes, which increase the load, and with quarries and oil fields, which decrease the load…hydrofracking requires disposing of fluid in deep wells, which was “much more likely to trigger earthquakes than fracking itself.’”

http://www.nytimes.com/2011/10/11/science/11qna.html?_r=1&ref=science

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