Skip to content
Subscriber Only

Oklahoma Quake Matches Record Even After Fracking Waste Restricted

  • Tremor of 5.6 magnitude was felt from Texas to Illinois
  • Regulator ordered suspension of about 37 disposal wells
Updated on

Oklahoma registered one of its biggest earthquakes Saturday even after state regulators have beefed up limits on disposing oilfield waste and the rate of tremors had started to slow somewhat from unprecedented levels last year.

The tremor in central Oklahoma was felt from Texas to Illinois, measuring 5.6 in magnitude and tying a state record set in 2011, according to the U.S. Geological Survey. The number of earthquakes measuring 3.0 or higher reached 890 last year, followed by 375 this year through June 22. At that rate, the number of earthquakes would fall to less than 800 this year, still a far cry from only two in 2008.