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.
10. Assam, Tibet -- This 8.6-magnitude quake struck on Independence Day in Tibet on Aug. 15, 1950.
9. Northern Sumatra, Indonesia -- About 1,300 people were killed in this 8.6-magnitude earthquake on March 28, 2005.
8. Rat Islands, Alaska -- The 8.7-magnitude earthquake hit on Feb. 4, 1965, triggering a small tsunami.
7. Ecuador Coast -- This 8.8-magnitude earthquake on Jan. 31, 1906, triggered a massive tsunami that killed more than 500 people.
6. Offshore Chile -- Nearly 500 people died in the 8.8-magnitude earthquake that hit off the coast of Chile on Feb. 27, 2010.
4. Offshore Japan -- A 9.0-magnitude earthquake triggered a tsunami that struck off the coast of northern Japan on March 11, 2011. The widespread damage left more than 15,000 people dead and several thousand more missing.
4. Kamchatka -- This 9.0-magnitude earthquake on Nov. 4, 1952, triggered a monstrous tsunami that caused massive damage there and in Hawaii.
3. Indian Ocean -- More than 230,000 people in 14 countries perished in this 9.1-magnitude quake and tsunami on Dec. 26, 2004.
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.
1. Chile -- Officially the largest earthquake on record since 1900, this 9.5-magnitude temblor killed thousands of people and triggered a massive tsunami that devastated Hilo, Hawaii.
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