Earthquake map

USGS website

WAYNOKA, Okla. — More than two dozen earthquakes have been recorded in northwest Oklahoma since Wednesday night.

Three of the temblors measured 4.0 magnitude or stronger, and two of those were the strongest quakes recorded in Oklahoma so far this year, according to U.S. Geological Survey records.

ENE series on earthquakes

The earthquake swarm began at 10:27 p.m. Wednesday with the strongest quakes — measuring magnitude 4.7 and 4.8 — 30 seconds apart near Waynoka, in southern Woods County. Throughout the next hour, those were followed by two quakes measuring 3.4 magnitude at Waynoka, and one 3.3 magnitude temblor in the Major County town of Cleo Springs.

According to the USGS, the 4.7 magnitude quake was 2 miles deep, and the 4.8 magnitude quake was 3.7 miles deep. The other temblors were all about 3 miles deep.

In the hours that followed, there were nine magnitude 3.0 or greater temblors and six measuring below magnitude 3.0.

The strongest since, a magnitude 4.0 quake, was recorded on the eastern edge of the swarm at Aline, in Alfalfa County, 16 miles northwest of Fairview and 44 miles west of Enid. It was 3 miles deep.

There were two other quakes less than 30 seconds apart in the swarm. A 3.0 magnitude temblor was recorded at 4:48 a.m. Thursday near Waynoka. It was 2 miles deep. A 3.5 magnitude quake followed 24 seconds later, within the same minute near Waynoka. It was 3 miles deep.

Other earthquakes were:

• A magnitude 3.0 at 11:37 p.m. Wednesday in Waynoka. It was 2 miles deep.

• A magnitude 3.2 at 12:03 a.m. Thursday in the Alfalfa County town of Carmen. It was 3 miles deep.

• A magnitude 2.6 at 12:20 a.m. Thursday in Waynoka. It was less than a mile deep.

• A magnitude 3.5 at 12:38 a.m. Thursday in Waynoka. It was 5 miles deep.

• A magnitude 2.5 at 1:50 a.m. Thursday in Waynoka. It was 4.9 miles deep.

• A magnitude 3.3 at 2:02 a.m. Thursday in Waynoka. It was 4 miles deep.

• A magnitude 3.7 at 2:06 a.m. Thursday in Waynoka. It was 3 miles deep.

• A magnitude 2.9 at 3:33 am. Thursday in Aline. It was 3 miles deep.

• A magnitude 2.8 at 4:12 a.m. Thursday in Waynoka. It was 3 miles deep.

• A magnitude 2.8 at 5:13 a.m. Thursday in Waynoka. It was 1.5 miles deep.

• A magnitude 2.6 at 5:22 a.m. Thursday in Waynoka. It was 2 miles deep.

• A magnitude 3.6 at 7:40 a.m. Thursday in Waynoka. It was 3 miles deep.

• A magnitude 3.1 at noon Thursday in Waynoka. It was 3 miles deep.

• A magnitude 3.3 at 12:34 p.m. Thursday in Waynoka. It was 3 miles deep.

The largest quakes were felt over a wide area, including Wichita, Kan.; Tulsa; Oklahoma City; Del City; and Norman. The USGS has indicated as many as eight states "may have been affected." 

There have been no immediate reports of damage.

The Oklahoma Corporation Commission will take some action, in response to the earthquakes, spokesman Matt Skinner said Thursday.

"We've been working on it since, obviously, early this morning. I can't give you a timeframe as to when something's going to be put together that I can announce, but I can promise you there will be actions," he said.

Since the beginning of the year, there have been 29 magnitude 3.0 or greater quakes — including four measuring magnitude 4.0 or greater — recorded in Oklahoma, USGS records show. Between Jan. 1, 2015, and Jan. 7, 2015, there were 18 magnitude 3.0 or greater temblors in the state.

In all of 2015, there were 907 magnitude 3.0 or greater quakes recorded in the state, Oklahoma Geological Survey Director Jeremy Boak said Tuesday.

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