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.
Shalereporter.com says Ohio is pushing back against federal oversight of fracking.
Rachel Morgan writes: "Despite a history marked with fracking catastrophes, Ohio still wants to retain oversight of its hydraulic fracturing and wastewater disposal industry.
"Rick Simmers, chief of the state’s Division of Oil and Gas Resources, testified Wednesday in Washington, D.C., against any federal oversight of fracking and wastewater disposal."
The full story is here.