Oklahoma earthquakes: After new regulations, state's shakes calm down a bit

WASHINGTON (AP) -- An Associated Press statistical analysis shows a dramatic drop in Oklahoma earthquakes since late May, when the state limited wastewater injections into energy wells.

And a new study says the state is on its way back to calmer times that prevailed before a huge jump in man-made earthquakes.

In parts of Oklahoma, the state ordered a 40 percent volume reduction in injection of saltwater -- waste from hydraulic fracturing -- that scientists generally blame for the massive increase in earthquakes.

RELATED STORIES: Magnitude 5.0 quake rattles Cushing | Strongest quakes in Oklahoma from 2012 to 2016

An AP analysis of U.S. Geological Survey data of earthquakes magnitude 3.0 or larger shows that before the new rules went into effect, Oklahoma averaged 2.3 quakes a day in 2016. Since then the average dropped to 1.3 a day, though some were large and damaging.

Stay in touch with us anytime, anywhere.

Download our free app for Apple and Android  and Kindle devices.

Sign up for newsletters emailed to your inbox. Select from these options: Breaking News, Severe Weather, School Closings, Daily Headlines and Daily Forecasts.

Follow us on Twitter

Like us on Facebook

Print this article Back to Top