Northern Arkansas feels unexplained surge in earthquakes

Thursday, February 17, 2011 | 12:04 p.m. CST

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.

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