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.
No Frack Ohio is organizing a major protest on Sunday at the Ohio Statehouse in Columbus.
Speakers include filmmaker Josh Fox, director of Gasland, and author Bill McKibben of the group 350.org that is involved in climate change.
More than 1,000 people have registered in advance for the rally and march that will be the largest anti-fracking rally ever in Ohio.
The protestors will assemble at 11 a.m. at Arch Park, also known as McFerson Commons, in downtown Columbus.
Then the group will march to the Statehouse. It will then symbollically approve "people's legislation" against hydraulic fracturing or fracking in drilling for natural gas.
The protestors will then march back to the park by 3 p.m..
For more information, go to www.dontfrackoh.org.
No Frack Ohio is sponsoring strategy and organizing workshops starting today (June 14) and running through Saturday (June 16).
Those programs will be held at the Ohio Urban Arts Center. A full agenda is available at www.dontfrackoh.org/schedule.
The drilling industry will also have a presence in Columbus this weekend.
The powerful American Petroleum Institute and Energy in Depth-Ohio have an event planned on Saturday (June 16) aimed at Fox and McKibben.
The event, at noon at the Center of Science and Industry, will include the Ohio premiere of the film Truthland, the anti-Gasland movie.
Click here for more details.