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.
From the Associated Press:
Norwegian energy company Statoil ASA says it has bought 70,000 acres of land rich in gas and liquid gas in West Virginia and Ohio.
The $590 million deal expands the company's assets in the Marcellus Shale gas deposits in the Appalachian region.
Company spokesman Baard Glad Pedersen said Statoil bought the latest acreage from unlisted companies Grenadier Energy Partners, Protege Energy and PetroEdge Energy.
Most of the acreage is in Ohio's Monroe County and West Virginia's Tyler, Wetzel and Harrison counties.
Statoil entered the Marcellus in 2008 through a partnership with Chesapeake Energy.
Statoil also owns shale land in Texas and operates leases in North Dakota and Montana.
Norway's government owns 67 percent of Statoil's shares.