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.
A company hired to conduct seismic testing in Columbiana County for Chesapeake Energy Corp. contends five landowners have illegally kept the company off their properties, the Youngstown Vindicator reports.
The suit was filed by TSG NOPEC Geophysical Co.
The five landowners all live south or southeast of Salem.
The company says the landowners refused to sign permits allowing TSG access, despite valid leases.
TSG said its staff was repeatedly denied access and that access is critical to the seismic testing
By refusing access, the landowners violated the terms of the leases, the company said.
The suit was filed in Columbiana County Common Pleas Court.
Three of the five leases involve older leases.
One lawyer involved said the case would have big impacts for landowners with similar leases across Ohio.