Oklahoma geologists have documented strong links between increased seismic activity in the state and the injection into the ground of wastewater from oil and gas production, a state agency said on Tuesday.
Currently, Oklahoma is recording 2-1/2 earthquakes daily of a magnitude 3 or greater, a seismicity rate 600 times greater than observed before 2008, the report by the Oklahoma Geological Survey (OGS) said.
It is "very likely that the majority of the earthquakes" are triggered by wastewater injection activities tied to the oil and gas industry, the OGS said. It warned that residents should be prepared for a "significant earthquake."
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