A 6.3-magnitude earthquake has left dozens dead in Iran. Check out the world's 10 largest earthquakes, according to the U.S. Geological Survey.
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2. Prince William Sound, Alaska -- Measuring 9.2-magnitude, the most powerful recorded earthquake in U.S. history struck on March 28, 1964, on Good Friday. The five-story J.C. Penney Building in Anchorage, Alaska was partly collapsed, although nearby buildings were not damaged.