News 9 (Link) - AP (April 8, 2011)
A magnitude 4.2 earthquake has been recorded in north-central Arkansas - the largest quake in the region since two natural gas companies agreed to close nearby injection wells last month.
The U.S. Geological Survey recorded the quake at 9:56 a.m. Wednesday about three miles northeast of Greenbrier. It's 1 of 10 quakes the U.S.G.S has recorded in the region since a 3.9 magnitude quake recorded at 6:11 p.m. Wednesday.
Greenbrier police dispatcher Steve Priddy said there are no reports of damage or injuries.
Seven tremors of 3.0 magnitude or greater have struck the region since the closure of the injection wells by Oklahoma City-based Chesapeake Energy and Clarion operating. †