Magnitude 3.9, 3.5 quakes rattle north central Oklahoma

Ponca City Now - August 10, 2016 11:14 am

PERRY, Okla. (AP) – A pair of earthquakes has rattled parts of north central Oklahoma.

The U.S. Geological Survey says quakes of magnitude 3.9 and magnitude 3.5 struck near the town of Perry late Tuesday afternoon.

There were no immediate reports of damage or injuries.

Geologists say damage is not likely in earthquakes below magnitude 4.0 and that earthquakes of magnitude 3.0 are the smallest that can be felt by humans.

The number of magnitude 3.0 or greater earthquakes has skyrocketed in Oklahoma, from a few dozen in 2012 to more than 900 last year.

Scientists link the increase to the underground disposal of wastewater from oil and gas production and state regulators have asked producers to reduce wastewater disposal volumes.

 

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