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10 Worst Earthquakes in U.S. History by Magnitude 2023 

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Worst Earthquakes in U.S. History 

1989 Loma Prieta Earthquake: Magnitude 6.9; October 17, 1989; California.

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Worst Earthquakes in U.S. History 

1868 Hayward Fault Earthquake: Magnitude 7.0; October 21, 1868; California.

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Worst Earthquakes in U.S. History 

1946 Aleutian Islands Earthquake: Magnitude 8.1; April 1, 1946; Alaska.

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Worst Earthquakes in U.S. History 

1811-1812 New Madrid Earthquakes: Magnitude 8.0 or greater; December 16, 1811, January 23, and February 7, 1812; Missouri.

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Worst Earthquakes in U.S. History 

1906 San Francisco Earthquake: Magnitude 8.3; April 18, 1906; California.

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Worst Earthquakes in U.S. History 

1957 Andreanof Islands Earthquake: Magnitude 8.6; March 9, 1957; Alaska.

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Worst Earthquakes in U.S. History 

1965 Rat Islands Earthquake: Magnitude 8.7; February 4, 1965; Alaska.

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Worst Earthquakes in U.S. History 

1700 Cascadia Earthquake: Magnitude 9.0; January 26, 1700; Pacific Northwest U.S.

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Worst Earthquakes in U.S. History 

1960 Great Chilean Earthquake: Magnitude 9.5; May 22, 1960; Alaska and Pacific Northwest U.S.

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Worst Earthquakes in U.S. History 

1964 Great Alaska Earthquake: Magnitude 9.2; March 27, 1964; Alaska.

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Best Place to See Northern Lights in May 

Fairbanks, Alaska