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Oklahoma Geological Survey experts at the University of Oklahoma are working closely with the Oklahoma Corporation Commission to figure out what’s causing all the earthquakes in areas where injection wells are not located.Director Jeremy Boak and his staff said the tremors have brought to light new fault lines that had not yet been discovered.“We’ve been working hard to delineate as many faults as we can in Oklahoma," he said. "We’ve issued a map and we know there are gaps because it’s difficult to find the faults when they don’t break all the way to the surface."Boak's staff has been working closely with the oil and gas industry, looking at maps and publications of fault lines that have been more defined by the earthquakes.“There have been a couple that have been highlighted a few times," he said. "The Prague quake delineated one which may have been sort of identified but actually clarified the location of that."A map showing the fault lines in Oklahoma shows several lines in the southern part of the state, but Boak said in the fault lines in the northern part of the state, where there’s been a lot of seismic activity, not yet been identified. Being able to map the fault lines would help better predict which parts of the state are more likely to see earthquakes.“Predicting where the next quake will happen is something no one’s been particularly successful at,” Boak said. “What we think we can do is locate areas of higher hazard.”The commission has reduced activity around oil and gas waste water wells to study what, if any, role they’re playing in sudden increase of activity.“It’s the seismic events that are caused by produced water, not frack water," Boak said. "If all we were injecting into these formations was frack water and drilling water, we wouldn’t have this earthquake problem. It’s the long-term production of water, along with the oil and gas, that’s giving us this headache.”