- Associated Press - Friday, August 12, 2016

HELENA, Okla. (AP) - The US Geological Survey reports a 4.0 magnitude earthquake has stuck northwestern Oklahoma.

The USGS says the quake was recorded at 12:27 a.m., 12 miles northeast of Helena, about 85 miles northwest of Oklahoma City.

There have been no reports of injury or damage.

The USGS says the earthquake was widely felt in central Oklahoma and as far north as Junction City, Kansas.

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 have linked 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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