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By SARAH EDDINGTON, Associated Press Sarah Eddington, Associated Press – 50 mins ago
LITTLE ROCK, Ark. – Jim Sutterfield was briefly puzzled by a thumping sound that seemed to slam the back of his office chair. But when the small-town Arkansas fire chief turned and saw no one was around, he quickly realized it was just an earthquake — again.
"That was only my second time to feel one, but others here have felt them for three or four months now,"
Originally posted by GenRadek
-snippety-
What do you think can be causing this? Fracking? Drilling? Subtle shifts in the fault lines? A NEW hidden fault line we were not aware of? I sure do hope this is nothing serious, and just a period of restlessness that will subside without any catastrophic quakes. Maybe its a good thing the small tremblors are happening now since they may release the pressure in small doses. Fingers crossed folks. I hope we dont have an apocalyptic event in the midwest. Hell I dont want my house to shake apart in Chi-town!
news.yahoo.com
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When the team analyzed the locations of the quakes and the energy each released, they found that the data indicated that the earthquakes were not migrating randomly. Instead, the faults seem to be mechanically coupled to each other, so that when one fault segment is ruptured, the energy is passed along to another fault segment, stressing it until it ruptures.