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.
There is a new company involved in Ohio's Utica shale: Colorado-based 1st NRG Corp.
The firm today announced that it has signed a letter of intent with a private third party to initiate development of about 7,150 acres in eastern Ohio.
The specific location of that development was not disclosed by the Denver-based company.
The seller was not identified.
"This is another major step forward for 1st NRG and its shareholders as we diversify our activity and pursue opportunity in an area rich in natural gas liquids and oil," said CEO Kevin Norris in a statement.