Arkansas Cities Feel Unexplained Surge in Earthquakes: 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 an earthquake–again!
The U.S. Geological Survey has reported more than 30 earthquakes in the area since Sunday, including a magnitude 3.8 and also two others of 3.2 and 3.5 magnitudes. There have been more than 700 quakes in the region over the past 6 months, puzzling researchers as to their cause.
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