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Earthquakes and
Ground shaking caused by the sudden release of accumulated strain by an abrupt shift of rock along a fracture in the earth or by volcanic or magmatic activity, or other sudden stress changes in the earth.
with
Arkansas
state
See also Science in your back yard: Arkansas

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PDF Earthquake hazard in the New Madrid seismic zone remains a concern [More info]
GPS measurements made since 1996 seem to show this earthquake-prone area slowing down. Is it time to relax? Scientists who studied these data in detail say no, and this fact sheet explains why.
Earthquakes in the central United States, 1699-2010 [More info]
Poster includes GIS data for earthquake locations in this seismically active area.
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