Strong quake shakes Oklahoma

Earthquake monitor. (iStock)
Earthquake monitor. (iStock)

Chicago - One of the largest earthquakes in Oklahoma was felt Saturday morning from Nebraska to North Texas.

The 5.6 magnitude earthquake happened at 07:02 on Saturday in north-central Oklahoma, The United States Geological Survey said. That ties for Oklahoma's strongest earthquake on record, the first coming in November 2011. No major damage was immediately reported.

An increase in magnitude 3.0 or greater earthquakes in Oklahoma has been linked to underground disposal of wastewater from oil and natural gas production. State regulators have asked producers to reduce wastewater disposal volumes in earthquake-prone regions of the state. Some parts of Oklahoma now match northern California for the nation's most shake prone, and one Oklahoma region has a 1 in 8 chance of a damaging quake in 2016, with other parts closer to 1 in 20.

People in Kansas City and St Louis, Missouri; Fayetteville, Arkansas; Des Moines, Iowa; and Norman, Oklahoma, all reported feeling the earthquake. Dallas TV station WFAA tweeted that the quake shook their studios, too.

Saturday's quake was centred about 14km northwest of Pawnee, Oklahoma. Earlier this week, the same spot, which is about 100km northeast of Oklahoma City, saw a magnitude 3.2 tremor.

Sean Weide in Omaha, Nebraska, told The Associated Press that he'd never been in an earthquake before and thought he was getting dizzy. Weide said he and one of his daughters "heard the building start creaking" and said it "was surreal."

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