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 New York coalition, the landowner Advocates of New York, is scheduling a pro-drilling rally on Oct. 15 in Albany.
It is billed as the largest mass pro-drilling demonstration.
It is being supported by the 77,000-member Joint Landowners Coalition of New York.
The message to Gov. Andrew Cuomo: We support drilling.
The rally will begin at 11 a.m. at the Corning Preserve Amphitheater.
At 12:15 p.m., there will be a march to the Capitol with more speakers at 1 p.m. at West Capitol Park.
For more information, go to www.cnylandcoalition.org.
New York is considering lifting a moratorium on drilling in the Marcellus shale.