The United States Geological Survey said a 5.6 magnitude earthquake happened at 7:02 a.m. Saturday in north-central Oklahoma, on the fringe of an area where regulators had stepped in to limit wastewater disposal. An increase in magnitude 3.0 or greater earthquakes in Oklahoma has been linked to underground disposal of wastewater from oil and natural gas production. However, hard bedrock beneath the surface in north-central Oklahoma is likely the reason for less damage, Oklahoma Geological Survey geophysicist Jefferson Chang said, adding that the subsurface around Prague is softer. Oklahoma and Kansas both had an uptick in quakes in the first half of this decade. Sean Weide in Omaha, Nebraska, told the AP that he'd never been in an earthquake before and thought he was getting dizzy.

Source: ABC News September 03, 2016 12:20 UTC