Last update:
August 27, 1998

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Failed Rift Stress Model

Eric Jackson, Dept. of Physics

Contents hy so many earthquakes?
That was the question that University of Arizona researchers set out to answer as they studied the unusual seismic activity throughout the New Madrid Seismic Zone, in Missouri. Follow the action as we dig deeper into the tumultuous underground world of earthquakes.
Failed Rifts

Earthquake Epicenters:
A Tale of Two Rifts

A Look Underground

Finite Element Model

Results of the Study

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