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earthquake

Another earthquake shook Oklahoma today. It measured 3.1 on the Richter scale, and struck just after 7 a.m. near Stroud, 65 miles from Oklahoma City.

That’s one of more than 500 this year, compared to California’s 156. Scientists have linked Oklahoma’s sharp increase in earthquakes in recent years to the underground injection of wastewater during oil and gas production.

Here & Now‘s Robin Young checks in with Joe Wertz, KGOU’s StateImpact reporter, about Oklahoma’s earthquake trends.

A 5.8-magnitude earthquake rocked Oklahoma on Saturday, prompting Gov. Mary Fallin to declare a state of emergency. On Wednesday, officials said it was the strongest quake in the state’s history.

The quake followed a string of thousands of smaller tremors that have raised questions about the impact of drilling for oil and gas, and the controversial technique of hydraulic fracturing, also known as fracking.

Mona Denney surveys earthquake damage inside her home near Pawnee, Okla.
Joe Wertz / StateImpact Oklahoma

The U.S. Geological Survey is upgrading the strength of an earthquake that shook the state on Sept. 3 to 5.8 magnitude. That change makes the Labor Day weekend temblor the most powerful earthquake ever recorded in Oklahoma. The quake is the latest in a seismic surge researchers say has largely been fueled by the oil industry practice of pumping waste fluid into underground disposal wells.

A 5.8-magnitude earthquake damaged the facade of a brick building in the city of Pawnee, Okla.
Joe Wertz / StateImpact Oklahoma

The strongest earthquake to hit Oklahoma in nearly five years shook the state Saturday morning, rousing some residents from a dead sleep. It was felt as far north as Nebraska and as far south as Texas.

Updated 6:30 p.m.

Gov. Mary Fallin declared a state of emergency for Pawnee County after the 5.6 magnitude earthquake struck the state Saturday morning, damaging buildings across north-central Oklahoma.

SandRidge Energy Inc. facilities superintendent Andy Ferguson, left, opens the valve at one of the company’s shuttered disposal wells on Aug. 10.
Sarah Terry-Cobo / The Journal Record

Two pairs of Logan County residents have dropped legal action against a quartet of Oklahoma energy companies.

Lisa Griggs and April Marler alleged their homes were damaged from earthquakes that were caused by New Dominion and subsidiaries of Chesapeake Energy, Devon Energy, and SandRidge Energy. Brenda Lene and Jon Darryn Lene also say their home was damaged by earthquakes caused by water injection. 

usgs.gov / U.S. Geological Survey

A magnitude 4.4 earthquake centered in northern Oklahoma has shaken the state, with reports of it being felt hundreds of miles away. 

The U.S. Geological Survey reported Monday's quake happened at about 3:20 p.m., with the epicenter located about 9 miles east of Cherokee near the Kansas border. People reported feeling the quake in several states, including Arkansas, Kansas, Missouri, Oklahoma and Texas.

The Alfalfa County Sheriff's Office said there were no immediate reports of injuries or damage.

University of Oklahoma graduate students near Wellston, Okla., installing a seismometer to study central-Oklahoma's earthquake swarm
Joe Wertz / StateImpact Oklahoma

A series of peer-reviewed papers published June 2 in The Leading Edge detail new research on disposal well-triggered earthquakes in Oklahoma.

seismic readout
Great Beyond / Flickr

A pair of earthquakes has rattled parts of Noble County in central Oklahoma.

The U.S. Geological Survey says each of the quakes was recorded early Sunday northwest of Perry.

The first temblor was recorded shortly after 5 a.m. about 12 miles north-northwest of Perry at a depth of about three miles. The USGS says the earthquake was a magnitude 3.1.

The second quake was recorded about two hours later about seven miles northwest of Perry, also at a depth of three miles. Geologists say that quake was magnitude 2.8.

Tim Phillips / Flickr.com

More than a dozen small to moderate earthquakes have been recorded in Oklahoma since Friday afternoon, including one with a preliminary magnitude of 4.2 that also was felt in Kansas and Texas.

The U.S. Geological Survey reports the quake occurred at 8:21 a.m. Saturday 12 miles north of Crescent, about 45 miles north of Oklahoma City.

Residents about 270 miles north in Topeka, Kansas, and about 240 miles south in Dallas reported feeling the quake.

Logan County Sheriff's Sgt. Greg Valencia says there are no reports of damage or injury.

USGS / www.earthquake.usgs.gov/earthquakes

New federal research says small earthquakes shaking Oklahoma and southern Kansas daily are dramatically increasing the chance of bigger and dangerous quakes.

Scientists link many of these quakes to the deep underground injections of wastewater after drilling for energy in a process known as hydraulic fracturing, or fracking.

Federal records show Oklahoma has had nearly 200 quakes that people have felt since Jan. 1.

Oklahoma’s surge in earthquakes and possible links to oil and gas activity has led regulators to scrutinize permits for disposal well operators in quake-prone regions of the state.

Former Oklahoma Geological Survey seismologist Austin Holland.
Joe Wertz / StateImpact Oklahoma

Washington Post reporter Lori Montgomery traveled central Oklahoma and filed a story about Oklahoma’s earthquake swarm, an examination that included interviews from concerned residents, politicians and Sandra Ladra, who was injured in the 5.7-magnitude November 2011 earthquake and 

Tim Phillips / Flickr.com

A swarm of earthquakes has rattled the Medford area in northern Oklahoma, including a magnitude 4.0 quake.

The U.S. Geological Survey says the earthquake struck at 8:43 a.m. Tuesday. Its epicenter was less than one mile east of Medford, which is about 100 miles north of Oklahoma City.

USGS

No injuries or damage have been reported after a 3.6-magnitude earthquake hit northern Oklahoma on Friday morning.

The U.S. Geological Survey says the quake struck at about 6 a.m. with an epicenter 14 miles north-northwest of Enid. The earthquake had a depth of 3.1 miles.

Two other earthquakes also rumbled Friday near the same area. The USGS says two earthquakes hit shortly after 1 a.m. near Medford. Those temblors had preliminary magnitudes of 3.1 and 3.2

On Wednesday, a 4.8-magnitude earthquake struck Kansas and was widely felt in parts of Oklahoma.

 

seismic readout
Great Beyond / Flickr

The U.S. Geological Survey has recorded a 4.1 magnitude earthquake near Stillwater.

The USGS says the earthquake was recorded at 2:10 p.m. Sunday five miles southwest of Stillwater, about 45 miles northeast of Oklahoma City.

The Payne County Sheriff's Office and Stillwater Police Department say there are no reports of damage or injury.

The quake comes following a 3.1 magnitude earthquake recorded in the same general area at 6:55 a.m. Sunday.

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