1957 Andreanof Islands earthquake

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The 1957 Andreanof Islands Earthquake was a magnitude 8.6 megathrust earthquake that took place on March 9, 1957. It was centered at 51.5° N 175.7° W, south of the Andreanof Islands group of the Aleutian Islands in the U.S. state of Alaska.

As of 2008 it remains the fourth largest-magnitude quake in the United States.[1]

The earthquake caused damage to infrastructure on Adak Island and Umnak Island, as well as causing an eruption of long-dormant volcano Mount Vsevidof. It also caused a tsunami that reached a height of 16 m (52 ft) and caused around $5,000,000 in damage in Hawaiʻi, destroying two villages on Oʻahu, and two bridges in the Aleutian region. No lives were lost in either the earthquake or the tsunami.

[edit] External links

• USGS Earthquake Hazards Program - Andreanof Islands, Alaska, Magnitude 8.6
• Tsunami! - 1957 Aleutian tsunami

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