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.
The Marcellus Drilling News reports that New York Gov. Andrew Cuomo's plan to allow limited horizontal drilling in the Marcellus shale could be limited to four southern counties.
Initial reports said that hydraulic fracturing or fracking might be allowed for two years in five New York counties: Broome, Chenango, Chemung, Steuben and Tioga.
All are near the New York-Pennsylvania border.
Pennsylvania has been drilling into the Marcellus shale. New York has a self-imposed moratorium in place that may be lifted.
The Marcellus Drilling News says that Chenango County may be dropped from the plan, but a large and very vocal landowners group is rallying to be included in the New York drilling plan.