San Francisco Chronicle: Workers drill for oil in the Gypsum Hills near Medicine Lodge, Kan., using the fracking technique. The method of disposing wastewater from the process may cause temblors strong enough to be felt. Pumping high-pressure water and sand underground to break up shale rocks and harvest natural gas or oil - the practice known as fracking - poses little risk of triggering significant earthquakes, a government-sponsored scientific committee reported Friday. But the method of disposing the wastewater...
URL: http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2012/06/15/MNS11P2P5E.DTL&type=science
Enclosure: http://imgs.sfgate.com/c/pictures/2012/04/26/mn-fracking06_PH_WRE0110470504_part6.jpg
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