U.S. Geological Survey Earthquake Hazards Program

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February 8, 2010 22:42:43 UTC

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February 8, 2010 22:38:46 UTC

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Today’s Earthquake Fact

The origin of the name of the San Andreas Fault is often cited as the San Andreas Lake. However, based on some 1895 and 1908 reports by geologist A.C. Lawson, who named the fault, the name was actually taken from the San Andreas Valley. Lawson likely did not realize at the time that the fault ran almost the entire length of California.

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