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 are reports that Youngstown City Council will vote Wednesday on whether injection wells should be banned in the city.
Councilwoman Janet Tarpley, sponsor of the measure, said she wants injection wells banned because they have been linked to a dozen earthquakes in the city between March and Decemberin 2011r.
Tarpley said she is not opposed to other forms of drilling.
She said her ordinance will not affect the only injection well in the city, operated by D&L Energy, but it will ban any further ones from operating there.