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Scientists: Increase in US Earthquakes Almost Certainly Manmade

Saturday, 07 April 2012 09:22
By Joe Romm, ThinkProgress

A U.S. Geological Survey (USGS) team has found that a sharp jump in earthquakes in America’s heartland appears to be linked to oil and natural gas drilling operations.

As hydraulic fracturing has exploded onto the scene, it has increasingly been connected to earthquakes. Some quakes may be caused by the original fracking — that is, by injecting a fluid mixture into the earth to release natural gas (or oil). More appear to be caused by reinjecting the resulting brine deep underground.

Last August, a USGS report examined a cluster of earthquakes in Oklahoma and reported:

Our analysis showed that shortly after hydraulic fracturing began small earthquakes started occurring, and more than 50 were identified, of which 43 were large enough to be located. Most of these earthquakes occurred within a 24 hour period after hydraulic fracturing operations had ceased.

More here.

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Ohio earthquake was not a natural event, expert says

By Kim Palmer | Reuters – Tue, Jan 3, 2012

CLEVELAND (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.

More here.

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No injuries, damage reported as earthquake unnerves locals

From Staff Reports

Cumberland Times-News The Cumberland Times-News Tue Aug 23, 2011, 11:13 PM EDT

CUMBERLAND — A 5.8 earthquake centered in Mineral, Va., unnerved residents and briefly shook buildings in Cumberland, Frostburg and McHenry and throughout the region Tuesday. No injuries or damage were reported locally.

Some buildings were evacuated as a safety precaution, including the courthouse on Washington Street and the Social Services Administration building in downtown Cumberland.

Kathy Rogers, spokeswoman for the Western Maryland Regional Medical Center, said security immediately began making rounds after the shaking was felt there.

“Everything is fine. The electricity stayed on and we are not having any problems,” she said. “I was at my desk and could feel the floor shaking for about 10 seconds. People are welcome to call us if they have concerns.”

The wall and windows facing South Mechanic Street on the second floor of the Times-News wobbled visibly during the afternoon temblor, bringing a roomful of reporters to their feet.

The incident prompted numerous calls to the newsroom from residents and businesses at Frostburg, Cumberland, Bean’s Cove and various other locations throughout the region.

At McHenry, a trooper at the Maryland State Police barrack said, “It felt like the wind was blowing but you knew it wasn’t the wind when you felt the floor shake.”

At Frostburg, the city police department felt the tremors. “We sure felt it but it was over before you realized it.”

A business at Frostburg reported the shaking there lasted about 25 seconds and shook office chairs.

Dick DeVore, an Allegany County emergency management spokesman, said that cell phone calls were not connecting for many users. “That would seem to be associated with the volume of calls being made rather than with any damage from the earthquake,” he said. “Text messages are working fine.”

Allegany County Board of Education officials began inspecting school buildings for structural damage shortly after the quake. Students were scheduled to return to classes today.

“All the buildings need to be checked for safety,” said Steve Wilson, supervisor of human resources, who was inside the Board of Education’s central office building during the earthquake Tuesday afternoon. Employees immediately evacuated, congregating on sidewalks along Washington Street.

“I thought a truck had hit the building,” Wilson said.

Coincidentally, BOE employees had reviewed evacuation procedures Tuesday morning as part of back-to-school preparations, said Bob Farrell, security coordinator.

“I’m glad we went over it,” he said.

At Northern High School in Garrett County, teachers reported that those on the second floor of the building felt the quake, but not those on the first floor.

Area emergency centers said they were flooded with calls with reports. CNN reported that the quake was felt from Toronto, Canada, down to Georgia. The earthquake also extended west to Detroit and Indianapolis.

Times-News staff writers Mike Sawyers, Jeff Alderton, Kristin Harty-Barkley and Emily Newman contributed to this report.

More here.

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Earthquake felt across Maryland, but no injuries, major damage reported

THE ASSOCIATED PRESS

First Posted: August 23, 2011 – 3:55 pm

Last Updated: August 23, 2011 – 6:23 pm

BALTIMORE — Maryland officials say the earthquake was felt across the state, but no injuries or major damage are being reported.

Maryland Emergency Management Agency spokesman Ed McDonough says Tuesday’s 5.8 magnitude quake, which was centered in Virginia, was felt from Garrett County to Somerset County, but only a few serious incidents are being reported.

The Maryland Transportation Authority closed the Harry W. Nice Bridge temporarily, but all other tunnels and bridges remained open.

State police spokesman Greg Shipley says all special operations teams are on standby.

More here.

Buying or selling real estate in Garrett County or Deep Creek Lake, Maryland? Call Jay Ferguson of Railey Realty for all of your real estate needs! I take great pride in referrals, and I assure you, I will take great care of your friends, family & colleagues!

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