Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
On June 6, Occupational Safety and Health Review Commission Administrative Law Review Patrick Augustine vacated a citation the federal Occupational and Health Administartion had issued to drilling company Petro-Hunt LLC for failure to have employees wear flame-resistant clothing.
The case involved a fire at the company's well in North Dakota in October 2010.
OSHA could appeal the decision.
But the ruling may have a big impact by curtailing OSHA's rules on well-drilling operations, according to attorney Chris Paul of McAfee & Taft, an Oklahoma law firm.
You can read Paul's blog on the decision by clicking here.