Until 2011, Youngstown had never recorded an earthquake. Now it has registered 11. Is fracking changes the facts in the ground?
CLEVELAND — A northeast Ohio well used to dispose of wastewater from
oil and gas drilling almost certainly caused a series of 11 minor quakes
in the Youngstown area since last spring, a seismologist investigating
the quakes said Monday.
Research is continuing on the now-shuttered injection well at
Youngstown and seismic activity, but it might take a year for the
wastewater-related rumblings in the earth to dissipate, said John Armbruster of Columbia University's Lamont-Doherty Earth Observatory in Palisades, N.Y.
Brine wastewater dumped in wells comes from drilling operations,
including the so-called fracking process to extract gas from underground
shale that has been a source of concern among environmental groups and
some property owners. Injection wells have also been suspected in quakes
in Ashtabula in far northeast Ohio, and in Arkansas, Colorado, and
Oklahoma, Armbruster said.
Thousands of gallons of brine were injected daily into the Youngstown
well that opened in 2010 until its owner, Northstar Disposal Services
LLC, agreed Friday to stop injecting the waste into the earth as a
precaution while authorities assessed any potential links to the quakes.
After the latest and largest quake Saturday at 4.0 magnitude, state
officials announced their beliefs that injecting wastewater near a fault
line had created enough pressure to cause seismic activity. They said
four inactive wells within a five-mile radius of the Youngstown well
would remain closed. But they also stressed that injection wells are
different from drilling wells that employ fracking.
Armbruster said Monday he expects more quakes will occur despite the shutdown of the Youngstown well.
"The earthquakes will trickle on as a kind of a cascading process once
you've caused them to occur," he said. "This one year of pumping is a
pulse that has been pushed into the ground, and it's going to be
spreading out for at least a year."
The quakes began last March with the most recent on Christmas Eve and
New Year's Eve each occurring within 100 meters of the injection well.
The Saturday quake in McDonald, outside of Youngstown, caused no serious
injuries or property damage.
Youngstown Democrat Rep. Robert Hagan on Monday renewed his call for a moratorium on fracking and well injection disposal to allow a review of safety issues.
"If it's safe, I want to do it," he said in a telephone interview. "If
it's not, I don't want to be part and parcel to destruction of the
environment and the fake promise of jobs."
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