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The 1964 Alaska earthquake, also known as the Good Friday Earthquake and the Great Alaskan Earthquake, happened on Good Friday, March 27, 1964. It lasted 4 minutes and 38 seconds and measured 9.2 on the moment magnitude scale, making it the most powerful quake in United States history. It was marked by tsunamis which killed people as far away as northern California and caused damage in Hawaii and Japan. It is believed that 139 people died as a result of the quake, with 124 of them in tsunamis.

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