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Oklahoma Quake Frequency Down 25% as Oil Companies Reduce Wastewater Disposal

Sue Ogrocki
/
AP photo

The number of earthquakes in Oklahoma has fallen 25% this year, reports The Wall Street Journal.The decline comes after the state’s efforts to curb the oil and gas industry’s practice of pumping wastewater from its underground operations.

Disposal wells have been blamed for a surge in earthquake activity in the state over the past decade. Earlier this year the Oklahoma Corporation Commission increased efforts to get companies to reduce the amount of wastewater they inject underground.

The efforts to ease wastewater disposal came after the oil-and-gas industry faced multiple class-action suits as a result of the quakes.

“The directives by the Oklahoma Corporation Commission to reduce wastewater disposal volumes are showing results,” said Chad Warmington, president of the Oklahoma Oil & Gas Association.