Experts: Okla. quakes too powerful to be man-made

November 7, 2011 By SETH BORENSTEIN and JONATHAN FAHEY , Associated Press
Joe Reneau displays the damage his home received in two earthquakes in less than 24 hours in Sparks, Okla., Sunday, Nov. 6, 2011. Reneau said the trash can at center had been filled with items damaged in an early morning quake on Saturday. The items on the floor and countertops spilled out of the cabinets during a quake on Saturday night. (AP Photo/Sue Ogrocki)

(AP) -- Experts say the flurry of earthquakes in Oklahoma can't be blamed on man's thirst for oil and gas.

The weekend quakes were far stronger than the weak caused by drilling - especially the controversial practice of hydraulic fracturing, known as fracking. The shaking caused by drilling is usually so weak that it can't be felt.

Experts say the Oklahoma quakes released nearly 16,000 times more energy than the strongest attributed to .

Federal, state and say preliminary readings show that the Oklahoma quakes are natural, following along the lines of a long-known fault.

The drilling question has been raised because of recent small quakes in Oklahoma and neighboring oil and gas states.

Explore further: Deep-ocean researchers target tsunami zone near Japan


Related Stories

Deep-ocean researchers target tsunami zone near Japan

January 17, 2008

Rice University Earth scientist Dale Sawyer and colleagues last month reported the discovery of a strong variation in the tectonic stresses in a region of the Pacific Ocean notorious for generating devastating earthquakes ...

Deadly quakes are coincidence, scientists say

March 8, 2010

(AP) -- Experts say there is nothing unusual about the latest spate of earthquakes in Haiti, Chile and now Turkey, but their devastating effects illustrate how increased construction up and down the world's fault lines can ...

Hundreds attend EPA hearing on Pa. gas drilling

July 22, 2010

(AP) -- Hundreds of people are attending a U.S. Environmental Protection Agency hearing in southwestern Pennsylvania on a controversial natural gas drilling technique called hydraulic fracturing, or "fracking."

English tremors blamed on shale 'fracking'

November 2, 2011

(AP) -- The only company in Britain using hydraulic fracturing to release natural gas from shale rock said Wednesday that the controversial technique probably did trigger earth tremors in April and May.

Recommended for you

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

not rated yet Nov 11, 2011
So why couldn't the fracturing of rock and addition of large quantities of lubricating liquid during hydraulic fracturing (commonly known as 'fracking') free up that long known fault to move and generate a much larger quake than encountered up to now? Why do these 'experts' not appear to have considered this possibility?

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.