Tag Archives: geology

21Feb/15
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USGS: Fracking Is The Cause of Earthquakes In Oklahoma

OKLAHOMA — It’s the million dollar question in Oklahoma: What’s causing all the earthquakes?

There have been a lot of theories about fracking causing earthquakes. But now, the U.S. Geological Survey (USGS) says that fracking, is indeed, to blame. Continue reading

07Mar/14
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Wastewater Injection Triggered Oklahoma’s Earthquake Cascade

One of Oklahoma’s biggest man-made earthquakes, caused by fracking-linked wastewater injection, triggered an earthquake cascade that led to the damaging magnitude-5.7 Prague quake that struck on Nov. 6, 2011, a new study confirms.

The findings suggest that even small man-made earthquakes, such as those of just a magnitude 1 or magnitude 2, can trigger damaging quakes, said study co-author Elizabeth Cochran, a seismologist with the U.S. Geological Survey.

“Even if wastewater injection only directly affects a low-hazard fault, those smaller events could trigger an event on a larger fault nearby,” she told Live Science. Continue reading

22Jan/14
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Man-Made Earthquakes

The number of earthquakes has increased dramatically over the past few years within the central and eastern United States. Nearly 450 earthquakes magnitude 3.0 and larger occurred in the four years from 2010-2013, over 100 per year on average, compared with an average rate of 20 earthquakes per year observed from 1970-2000.

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