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.
Antero Resources has 15 drilling rigs working in the Marcellus and Utica shales.
The Colorado-based companyy has 393,000 acres in the Marcellus and the Utica shales.
To date, it has completed three wells in the Utica shale and has drilled four additional wells.
It has 88,000 acres in the southern Utica area in southeastern Ohio.
Click here to read more from the company on its 2012 earnings and its 2013 plans: http://www.anteroresources.com/wp-content/uploads/YE2012-Antero-Earnings.pdf