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 anti-drilling grass-roots group, Concerned Citizens of Medina County, is holding a public meeting on Jan. 20 in Brunswick.
The meeting will begin at 7 p.m. in the Brunswick City Hall, 4095 Center Road (state Route 303).
Speakers include Medina County Commissioner Adam Friedrick, state Rep. David Hall, R-Millersburg, Jack Shaner of the Ohio Environmental Council and Ron Prosek of the Northeast Ohio Gas Accountability Project.