Read the story here. Advertise at Before It's News here.
Profile image
Story Views
Last hour:
Last 24 hours:

Oklahoma's M5.8 earthquake activated an unknown fault

% of readers think this story is Fact. Add your two cents.

USGS Geophysicist Daniel McNamara said that September 3, 2016 Mw5.8 Pawnee, Oklahoma earthquake was not on a fault known by the USGS.

Instead, it happened on a fault perpendicular which intersected the fault. Based on aftershock patterns, this one is an unknown fault that has now been activated. 

“Aftershocks from that earthquake show the undiscovered fault line that runs near or through Stillwater, Oklahoma,” McNamara said.

“At this point, we don’t know if the quake is related to wastewater injection, but it’s very similar to other sequences that have been, so it’s highly likely,” said McNamara.

However, he said, this earthquake also looked natural in some ways based on the before-shock behavior. “There were only a few two to three magnitude earthquakes leading up to the big shake. This is compared to 2011 in Prague when there were three and four magnitude earthquakes before the major one.”

“Magnitude fives occurred in Oklahoma maybe once every 50 to 100 years, naturally occurring earthquakes,” said McNamara. “But in the last five years, you’ve had three earthquakes over magnitude 5.”

The recently discovered fault has the potential to produce a larger earthquake, McNamara concluded.

On September 7, 2016, the U.S. Geological Survey has updated the official magnitude of the Pawnee earthquake to Mw5.8 (from 5.6), making it Oklahoma’s largest recorded earthquake to date.

“The magnitude revision is based on further in-depth analysis of seismic recordings. Changes in estimated magnitude for an earthquake are common in the hours-to-days following the event, as more data are analyzed in greater detail than is possible in the first minutes after the earthquake occurs,” the agency said in a statement on September 7.

USGS has also updated the official magnitude of the November 6, 2011 Prague, Oklahoma earthquake to Mw5.7 (from 5.6), making it the second largest earthquake to hit the state. Previously, it was considered as the largest.

Questions regarding their relative size prompted a re-analysis of both earthquakes and both updates are the result of comprehensive studies of the long-period, globally-recorded seismic data for these earthquakes, using consistent approaches and datasets for each event, USGS explained.

Featured image credit: Daniel McNamara

Let’s block ads! (Why?)


Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!

Order by Phone at 888-809-8385 or online at M - F 9am to 5pm EST

Order by Phone at 866-388-7003 or online at M - F 9am to 5pm EST

Order by Phone at 866-388-7003 or online at M - F 9am to 5pm EST

Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Report abuse


    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    Load more ...




    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.