Earthquake spike pushes Oklahoma to consider tighter fracking regulations

Decision comes after recent uptick in temblors - 35 of at least 3.0 magnitude from 17-24 June - but it remains unclear what such regulations will look like

Oklahoma is considering tightening regulations on its oil and gas industry, after a spate of earthquakes which regulators say were probably related to an increase in fracking in the state.

Between 17 and 24 June, Oklahoma experienced 35 earthquakes of 3.0 or greater magnitude, a huge jump from the average of about 12 a week experienced over the last year, according to the Oklahoma Geological Survey.