More Fracking Earthquakes

States where hydraulic fracturing is taking place has seen a surge in earthquake activity leading many to believe that the method could be to blame in particular the wells where wastewater is disposed of. According to Emily Schmall and Justin Juozapavicius, States With Fracking See Surge In Earthquake Activity, fracking creates far more wastewater than traditional drilling methods. The water is pumped thousands of feet underground into injections wells and no one knows what happens to the liquid after that. Scientists wonder whether this action triggers quakes by increasing underground pressure and lubricating faults. Since January, Oklahoma has recorded nearly 250 small to medium earthquakes according to stats kept by  the U.S. Geological Survey. That’s almost half of the magnitude 3 or higher earthquakes recorded this year in the continental U.S. A study published in the journal of Science earlier this month suggest that four wells injecting massive amounts of drilling wastewater into the ground are shaking up the state accounting for one out of five quakes from the eastern border of Colorado to the Atlantic coast. Another concern expressed was whether injection well operators could be pumping too much water into the ground or pumping it at high pressures. Most of the quakes where injection wells are clustered are too weak to cause serious damage or endanger lives, however, some states including Ohio, Oklahoma, and California have introduced new rules compelling drillers to measure the volumes and pressures of their injections wells and monitor seismic activity during fracking operations. No injuries or deaths have been reports, but varying degrees of property damage have been reported e.g Azle, Texas had hundreds of small quakes since activity began and residents reported sinkholes and cracks in the walls of homes and air and water quality concerns. In addition, two structures collapsed during Oklahoma’s 5.7 magnitude quake in 2011. Studies more than 50 years old have linked injection wells to tremors in Colorado, while similar studies in central Oklahoma, Ohio and North Texas have found probable links between injection wells and quakes. According to Dana Bohan with Energy In Depth, a research and education arm of the Independent Petroleum Association of American, a Washington based group representing thousands of oil and gas producers, said wastewater injection disposal does risk inducing quakes.

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