Tsunami Threats in the U.S.
There are only two places in the U.S. where an earthquakecould cause a tsunami on the scale of the one that hit theFar East recently. Studies show that at least one of theseareas is long overdue for a quake and may have one at anytime.
Robin Lloyd writes in LiveScience.com that the Cascadiasubduction zone, running 50 miles up the coast of thePacific Northwest, has experienced four huge earthquakes inthe past 1,600 years, and another big one is overdue.
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