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Ohio Quake Linked to Wastewater Well

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by Dan Vergano, USA Today - January 3, 2012

      

This photo made Jan. 2, 2012 shows the site of a brine injection well owned by Northstar Disposal Services LLC in Youngstown, Ohio. The company has halted operations at the well, which disposes of brine used in gas and oil drilling, after a series of small earthquakes in the Youngstown area. Photo: Dan Pompili, Warren Tribune-Chronicle / AP

Ohio earthquakes tied to a deep wastewater disposal well are raising safety questions, amid a nationwide natural gas drilling boom.

On New Year's Eve, a magnitude-4.0 quake outside Youngstown, Ohio, shook the ground as far north as Toronto. Earthquake experts tied the event, the latest and largest in a series stretching back to March, to a 1.7-mile-deep wastewater disposal well, prompting state officials to shut it down.

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by Kim Palmer - Reuters - January 3, 2012

(Reuters) - A 4.0 magnitude earthquake in Ohio on New Year's Eve did not occur naturally and may have been caused by high-pressure liquid injection related to oil and gas exploration and production, an expert hired by the state of Ohio said on Tuesday.

Ohio's Department of Natural Resources on Sunday suspended operations at five deep well sites in Youngstown, Ohio, where the injection of water was taking place, while they evaluate seismological data from a rare quake in the area.

The wells are about 9,000 feet deep and are used to dispose of water from oil and gas wells. The process is related to fracking, the controversial injection of chemical-laced water and sand into rock to release oil and gas. Critics say that the high pressure injection of the liquid causes seismic activity.

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