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.
No permits for Utica shale horizontal wells have been filed in Ohio's Richland County, but there appears to be a leasing flurry in the northern part of the county, reports the Mansfield News Journal.
The paper said landowners are getting leasing bonuses of $4,500 to $6,000 an acre.
Richland County lies at the western edge of the Utica shale, and Devo Energy has capped disappointing wells in other nearby western-edge counties.