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Strongest in the United StatesThe Good Friday Earthquake which struck Alaska, USA on March 27, 1964 measured 9.2-magnitude on the Richter scale. Strongest in the 48 contiguous United StatesThe New Madrid Earthquake on February 7, 1812 is estimated to have measured 8.0 magnitude.

Answer #2

Actually the 1812 New Madrid Earthquake was measured 7.7 according to the USGS. Therefore, the strongest earthquake in the continental US was magnitude 7.9 on Jan 9, 1857 in Fort Tejon, California.

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12y ago

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