Updated Mon, Oct 31, 2011 12:30 pm
Geologists are checking for possible links between a brine-water injection well and seven minor earthquakes since March in northeast Ohio.
The quakes are the only ones recorded with epicenters in Youngstown and the Mahoning Valley.
Experts are checking the 18-month-old injection well completed in Youngstown 10 months before the quakes began.
Brine water is a byproduct of hydraulic-fracking natural gas and oil drilling and is flushed underground.
Geologist Jeffrey Dick of Youngstown State University says there's not enough data yet to prove a link between the well and the earthquakes.
State regulators and the well operator say they haven't seen evidence of a correlation.
Wastewater from Pennsylvania drilling makes up most business for the Youngstown well.