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.
Here are a few items that have recently surfaced:
1. Permits have been filed for the first two horizontal wells in Athens County in southeast Ohio.
The permits were filed by local developer Brent Harper and Randy Wolfe of R. Wolfe Oil and Gas, according to Marcellus Drilling News and the Athens News.
They are eying a third well, also in Athens County.
2. In Pennsylvania, the average Chesapeake Energy Corp. well in the Marcellus shale produces 4.75 million cubic feet of natural gas per day.
The average natural gas volume from non-Chesapeake wells in Pennsylvania is 1.8 million cubic feet per day.
That tidbit came from the Marcellus Drilling News in a report on Chesapeake's drilling activity in Pennsylvania's Bradford County.
3. The U.S. Environmental Protection Agency is seeking nominations to its Science Advisory Board.
The notice ran in the Federal Register.
That board will soon begin looking at the impacts of hydraulic fracturing r fracking on drinking water.
It will look at what the agency is doing. A preliminary report is due out in December 2012 and a final report in 2014.
4. Ohio's Licking County has formed a fracking advisory committee.
No wells have been drilled in the central-Ohio county, but the county formed the committee to study fracking and prepare for it.