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.
New York has not approved drilling in the Marcellus shale, but one Norwegian company is very interested.
Norse Energy has filed seven applications since November in central New York within 50 miles of the New York-Pennsylvania border.
It has 22 more permit applications in the works.
"We're incurable optimists," said executive vice president Dennis Holbrook of Norse Energy Holdings in Buffalo.
The company has 130,000 acres under lease in New York.
Dozens of applications were filed in 2008 and 2009, but no permits have been approved and none will be until the state completes its investigation of hydraulic fracturing or fracking. Most companies stopped filing permits.
Applications are also pending from Oklahoma-based Chesapeake Energy Corp. and Talisman Energy, based in Canada.
Officials noted that the permits may have to be updated, depending on what New York decides later this year.