Quote:Oklahoma regulators have told energy companies to sharply reduce underground wastewater disposal across an earthquake-prone stretch of the state, a move that ratchets up a so-far unsuccessful effort to reduce quakes related to oil and gas production.

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The roughly 40-mile stretch that includes the wells has experienced a drastic increase in earthquakes in the last two years.

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“The seismicity is off the charts, and we don’t have any high-volume wells there,” said Tim Baker, the director of the Oklahoma Corporation Commission Oil and Gas Conservation Division. “So we’ll go ahead and reduce the volume and see if that has any effect on seismicity.”