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.
From the Associated Press:
State environmental officials are looking into the cause of a waste water spill from a faulty natural gas well in northeastern Pennsylvania.
The spill allowed thousands of gallons of fluid waste to escape, forcing the evacuation of nearby residents.
Department of Environmental Protection spokeswoman Colleen Connolly says the well in Wyoming County was brought under control early Thursday afternoon. It had begun malfunctioning around 6 p.m. Wednesday and worsened overnight.
Connelly says about 227,000 gallons of the fluid was captured in tanks. Four families were asked to evacuate.
The Times-Tribune reports she says there was no gas buildup or explosion and investigators are looking into the cause. Crews found no evidence of volatile chemicals or methane, but are continuing to look into any soil or water impacts.