The biggest earthquake in American history was on March 28th 1964, in the Prince William Sound in Alaska, and it was a magnitude 9.2. The 8 biggest earthquakes in America have been in Alaska, so they have not caused as much damage as they could. As for the worst earthquake, it has got to be the 1906 quake in San Francisco. It was a round a 7.8 in magnitude, and in todays money caused 8.2 million dollars in damage due to the large fires.
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