Since September 20, the town of Guy has experienced an almost constant shaking from 487 measurable earthquakes.
(CNN) -- The Arkansas Geological Survey is trying to unravel a mystery: What is causing earthquakes in the town of Guy, Arkansas?
Since September 20, the community of 549 residents north of Little Rock has experienced an almost constant shaking from 487 measurable earthquakes.
"We've had 15 today including a 3.1 (magnitude) from this morning," Scott Ausbrooks, geohazards supervisor for the Geological Survey, said Monday. "These are shallow quakes between two and eight kilometers (between one-and-a-quarter and five miles) below the surface."
While earthquakes aren't unusual in the Southeast state, the frequency is.
"This time last year we had 39 quakes total for the entire state," said Ausbrooks.
Most of the quakes in the swarm -- a localized surge of earthquakes with all of them about the same magnitude, according to the United States Geological Survey -- are so small they go unnoticed. The largest, a 4.0 on October 11, caused the only documented damage, cracking a window at a visitor's center to a state park.
Guy Mayor Sam Higdon said when the swarm first happened, citizens took notice. "They were calling City Hall asking, "What are you going to do?'" he said.
In response to the constant bombardment of tiny quakes, Higdon's office has organized a three-hour long town meeting, and sought the help of state geologists and members of the oil and gas industry to find answers.
"My wife wants to buy earthquake insurance. I'm trying to talk her out of it," the mayor said Monday.
There are several geologic faults in the area, but none associated with the New Madrid fault, the large seismic fault in the region and one that was the source of an estimated 7.0-magnitude earthquake in 1811. And there was another historic flurry of earthquakes in 1982, 15 miles south of Guy. Geologists know it as the Enola Swarm, responsible for 15,000 quakes within a year's time, followed by more shaking in 2001.
http://www.cnn.com/2010/US/12/13/arkansas.earthquakes/index.html?hpt=T2
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Links:
[1] http://topics.cnn.com/topics/Earthquakes
[2] http://topics.cnn.com/topics/Arkansas
[3] http://topics.cnn.com/topics/Little_Rock
[4] http://www.addthis.com/bookmark.php?v=250&username=questministries
[5] http://realneo.us/../../../../../blogs/questministries
[6] http://www.nationalwardogsmonument.org/
[7] http://www.disclosureproject.com/