Columbus Dispatch: State officials now say a series of earthquakes that shook Mahoning County last month likely were caused by fracking, leading them to create the most stringent drilling rules in the nation, requiring seismic monitoring near fault lines and epicenters.
Yesterday, the Ohio Department of Natural Resources announced the rules, which say that monitors must be placed at new drilling sites within 3 miles of known fault lines or areas that experienced an earthquake greater than magnitude 2.0.
The state...