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.
Aubrey McClendon will remain CEO of Chesapeake Energy but he is stepping down as chairman, the energy company said on Tuesday.
That's been the biggest news of the week.
McClendon stepped down as CEO, amid reports that he did not disclose $1.4 billion in loans that he received from a private equity firm that had dealings with his Oklahoma-based company.
Here's an anlysis of McClendon's problems from Time magazine. Click here to read that account.
Chesapeake Energy is the No. 1 player in Ohio's Utica shale.