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.
Oklahoma-based Chesapeake Energy Corp. on Thursday confirmed that the company and its chairman and CEO, Aubrey McClendon, are under investigation by the U.S. Securities and Exchange Commission.
The company was notified on Wednsday by the SEC's Fort Worth regional office in Texas of an informal inquiry.
The federal agency requested that the company and McClendon retain certain documents.
The company and McClendon pledged to coperate with the SEC inquiry.
In related news, a U.S. senator is asking the U.S. Justice Department to investigate Chesapeake and McClendon.
The request was announced by Bill Nelson, a Florida Democrat.
You can read about his request and Chesapeake's problems here.