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.
Pennsylvania-based Rex Energy is drilling its first horizontal well into the Utica shale in Ohio's Carroll County.
The company said it expects the Brace 1H well to be completed and results available by the second quarter of 2012 conference call in August.
The firm has 15,000 net acres in Carroll County and is acquiring more Utica acreage in Ohio.
The company plans to drill two additional Utica horizontal wells in the Warrior Prospect formation in Carroll County in 2012.