Hydraulic fracturing — or 'fracking' — in Oklahama's Wilzetta oilfields as far back as the nineties may have caused the biggest earthquake in the state's history. New research, published in the journal Geology , suggests that the expansion of wastewater, injected into Oklahoma's sealed oil wells, placed enough stress on "reservoir-bounding faults" to trigger three successive earthquakes in 2011, the largest of which measured 5.7 on the Richter scale.
via The Verge - All Posts http://www.theverge.com/2013/3/28/4156074/fracking-linked-to-2011-oklahoma-quake
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