WDAY: The News Leader

Published May 07, 2014, 12:00 AM

Oklahoma Earthquakes

Between last October and April 14, Oklahoma experienced 183 quakes of magnitude 3.0 or greater, the USGS and Oklahoma Geological Survey said. That is an increase from the state's long-term average from 1978 to 2008 of only two magnitude 3.0 or larger quakes per year.
Read the article: Feds: Energy mining's disposal wells may have role in Oklahoma's earthquakes