The state Department of Environmental Protection is investigating whether fracking contributed to two small earthquakes in Lawrence County.
DEP officials say Hilcrop Energy Co. was hydraulically fracturing two wells in Mahoning Township when the U.S. Geological Survey recorded a magnitude-1.9 earthquake early Monday. That was followed by another quake of the same size Monday night.
Hilcorp was fracking two wells on a four-well pad when the first quake occurred.
There were no reports of property damage.
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