More drilling-linked earthquakes rattle Oklahoma

2015-07-28 12:46

Multimedia   ·   User Galleries   ·   News in Pictures Send us your pictures  ·  Send us your stories

Oklahoma City - Several earthquakes shook Oklahoma on Monday as the state experiences a sharp increase in the frequency of tremors linked to wastewater disposal from gas and oil drilling, including from fracking, state and federal officials said.

Three of Monday's quakes measured above a magnitude 4.0, with a 4.5 earthquake centred just north of Crescent, roughly 72km north of Oklahoma City, the US Geological Survey (USGS) said.

The largest tremor, logged a "significant earthquake" by the USGS, could be felt as far away as Wichita, Kansas, about 260km north, broadcaster KOTV reported.

There were no reports of damage.

The rate of earthquakes in Oklahoma has increased by about 50% since 2013, greatly increasing the chance for a damaging quake, according to the USGS.

Noticeable quakes - above magnitude 3.0 - now hit the state at a rate of two per day or more, compared with two or so per year prior to 2009. During the past seven days, Oklahoma has experienced about 40 earthquakes, according to the USGS.

Scientists say the seismic activity is triggered by the injection of wastewater from booming oil and gas drilling operations into deep geological formations.

The state's oil and gas regulator released a directive this month expanding "Areas of Interest", parts of the state that have been worst-hit by the quakes, and adding restrictions for 211 disposal wells.

In March, the regulator – the Oklahoma Corporation Commission – also directed 347 wells to reduce their injection depths to above the Arbuckle formation. High-volume injections into the Arbuckle, the state's deepest formation, have the highest potential for seismic activity, according to the USGS.

Twenty-one of Oklahoma's 77 counties are under the order, and oil and gas drilling operators have until August 14 to comply with reducing injection depth.

Read more on:    us  |  earthquakes
NEXT ON NEWS24X

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
0 comments
Comments have been closed for this article.

Inside News24

 
/News
Traffic Alerts
Traffic

Jobs in Cape Town [change area]

Jobs in Western Cape region

Data Analyst

Cape Town
Tumaini Consulting
R540 000.00 - R800 000.00 Per Year

Imports Controller

Cape Town
Professional Career Services
R10 000.00 - R12 000.00 Per Month

Architect

Cape Town
Mass Staffing Projects
R400 000.00 - R600 000.00 Per Year

Property [change area]

There are new stories on the homepage. Click here to see them.
 
English
Afrikaans
isiZulu

Hello 

Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.


Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.