Reuters reports that Cuadrilla Resources will add earthquake monitors at its drilling sites in the United Kingdom.
That news comes more than a year after the British government ordered the firm to halt hydraulic fracturing or fracking temporarily after nearby minor earthquakes near Blackpool.
The company said it wll use a so-called traffic light signal based on a seismometer network that measures earthquake activity through sound in real time.
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.