Arkansas Quakes Possibly Linked to Gas Drilling Disposal Operations

A spate of earthquakes in central Arkansas has experts looking into whether a process related to natural gas drilling might be to blame.

As The New York Times reports, a temblor near Greenbrier, Ark., on Sunday was the largest in the area in 35 years. It followed a swarm of small earthquakes, including dozens on a weekly basis, in the region since early fall.

Residents reported that the latest quake, which had a magnitude of 4.7, cracked home ceilings and knocked screen doors off their hinges.

Researchers with the Arkansas Geological Survey have noticed a link between the earthquakes and the timing and location of injection wells, through which wastewater from gas drilling is disposed.

Researchers do not see a pattern, however, between the earthquakes and the drilling process being used in the area itself, which is known as hydraulic fracturing or fracking. That process, a major concern to environmentalists who focus on water contamination, involves injecting water, sand and chemicals into underground rock formations at high pressures to create cracks that help extract natural gas.

Establishing a conclusive link between the temblors and the injection wells is complicated by the fact that earthquake clusters have occurred in central Arkansas in the past. While more studies are conducted, the Arkansas Oil and Gas Commission has declared a moratorium on new wells.

Although the earthquakes haven’t caused major damage, there are concerns that they could become worse. Scott Ausbrooks, a state geological survey researcher, told the Times that there is an outside chance that the fault line where the temblors have occurred could produce a 5.5-magnitude quake.

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Probers Say Energy Firms’ Fracking May Violate Safe Water Law

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One comment to “Arkansas Quakes Possibly Linked to Gas Drilling Disposal Operations”

  1. Ashlyn McClure

    I think the Earthquakes are man made. I think they are because Earthquakes start in the ground about 3.5 miles deep. The people are drilling about 30 something feet in the earth just to put wasteful water back into earth. In 2009 there were only 37 Earthquakes, in 2010 there was 737 Earthquakes. That is one big jump. They have to be man made. In Guy county they had over 600 earthquakes and alot of guys are putting the Wasted water back into the ground there.
    So think about it.
    Sincerely Ashlyn McClure, 8th grade student

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