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Earthquakes in Oklahoma are manmade, strongly linked to fracking wastewater injection: Study

Man-made earthquakes in Oklahoma are strongly linked to fracking methods such as the injection depth of wastewater, according to a major study published in Science.  The study aimed to provide targeted evidence in proving that there has been a substantial decrease in induced seismicity in the Oklahoma region, with possible applications in other parts of the world.  There has been an approximately 800-fold increase in the annual number of earthquakes in Oklahoma since 2011, which is associated with the connection between the frequency of earthquakes (seismicity) and the depth of fluid injection into underground rock formations.  Read more...


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