ExpiredInsider Insights: Articles - Fracking could be behind recent spike in Oklahoma earthquakes - The Weather Network


Please choose your default site




Insider Insights: Articles

Fracking could be behind recent spike in Oklahoma earthquakes

File photo courtesy: Flickr/Kevin Dooley

File photo courtesy: Flickr/Kevin Dooley

By Cheryl Santa Maria
Digital Reporter
Monday, May 12, 2014, 9:26 AM

Since October 2013, seismologists have documented a nearly 50 percent spike in earthquake activity in Oklahoma, significantly increasing the chance for a damaging tremor to occur.


A recent U.S. Geological Survey and Oklahoma Geological Survey analysis has revealed that 145 earthquakes of magnitude 3.0 or greater occurred in Oklahoma between January and May 2, 2014, replacing the previous annual record of 109 earthquakes set back in 2013.

The spike in activity is especially alarming when compared to the 1978-2008 average earthquake rate of only two magnitude 3.0 or larger earthquakes per year. 

“While it’s been known for decades that Oklahoma is 'earthquake country' we hope that this new advisory of increased hazard will become a crucial consideration in earthquake preparedness for residents, schools and businesses in the area,” said Dr. Bill Leith, Senior Science Advisor for Earthquakes and Geologic Hazards at USGS, in a statement.

“Building owners and government officials should have a special concern for older, unreinforced brick structures, which are vulnerable to serious damage during sufficient shaking.”

RELATED: Get an in-depth analysis of Oklahoma earthquake activity from digital meteorologist Scott Sutherland


Experts appear to be pointing the at fracking, or hydraulic fracturing.

This process involves injecting a mix of water, chemicals and sand deep into the ground to extract natural gas from shale rock.

"This phenomenon is known as injection-induced seismicity, which has been documented for nearly half a century, with new cases identified recently in Arkansas, Ohio, Texas and Colorado," The USGS writes.

"A recent publication by the USGS suggests that a magnitude 5.0 foreshock to the 2011 Prague, Okla., earthquake was human-induced by fluid injection; that earthquake may have then triggered the mainshock and its aftershocks ... studies also indicate that some of the earthquakes in Oklahoma are due to fluid injection.."

The 2011, magnitude 5.6 Prague earthquake was the largest in Oklahoma’s history, damaging a number of homes and buildings.

In response to the increased seismicity, the Oklahoma Geological Survey and the USGS have increased the number of monitoring stations and are actively working to quantify the increased hazard potential in central Oklahoma.

More by this author
Iceberg six times the size of Manhattan has drifted out to sea
Time Lapse Tuesday: Chasing Ice with Jeff Orlowski
To boldly go: Starfleet logos discovered on Mars
Arctic sea ice continues downward trend

Leave a Comment

What do you think? Join the conversation.
Default saved

Search Location


Sign In

Please sign in to use this feature.