Add Quakes to Rumblings Over Gas Rush
YOUNGSTOWN, Ohio — Until this year, this Rust Belt city and surrounding Mahoning County had been about as dead, seismically, as a place can be, without even a hint of an earthquake since Scots-Irish settlers arrived in the 18th century.
But on March 17, two minor quakes briefly shook the city. And in the following eight months there have been seven more — like the first two, too weak to cause damage or even be felt by many people, but strong enough to rattle some nerves.
“It felt like someone was kicking in the front door. It scared the stuffing out of me,” said Steve Moritz, a cook who lives on the city’s west side, describing the seventh quake, which occurred in late September. It was the strongest one, with a magnitude of 2.7.
Nine quakes in eight months in a seismically inactive area is unusual. But Ohio seismologists found another surprise when they plotted the quakes’ epicenters: most coincided with the location of a 9,000-foot well in an industrial lot along the Mahoning River, just down the hill from Mr. Moritz’s neighborhood and two miles from downtown Youngstown.
full: http://www.nytimes.com/2011/12/13/science/some-blame-hydraulic-fracturing-for-earthquake-epidemic.html?pagewanted=all
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