From the U.S. Energy Information Administration today:
The Permian Basin in Texas and New Mexico is the nation's most prolific oil producing area. Six formations within the basin have provided the bulk of Permian's 60% increase in oil output since 2007. Crude oil production in the Permian Basin has increased from a low point of 850,000 barrels per day (bbl/d) in 2007 to 1,350,000 bbl/d in 2013.
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.