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<br /> Hazard Mitigation Plan | 2022 <br />Earthquake Hazards <br />- 53 - <br />San Andreas Fault Zone <br />The San Andreas Fault Zone falls East of the City. This fault zone extends from the Gulf of <br />California northward to the Cape Mendocino area where it continues northward along the ocean <br />floor. The total length of the San Andreas Fault Zone is approximately 750 miles. The activity of <br />the fault has been recorded during historic events, including the 1906 (M8.0) event in San <br />Francisco and the 1857 (M7.9) event between Cholame and San Bernardino, where at least 250 <br />miles of surface rupture occurred. These seismic events are among the most significant <br />earthquakes in California history. Geologic evidence suggests that the San Andreas Fault has a <br />50 percent chance of producing a magnitude 7.5 to 8.5 quake (comparable to the great San <br />Francisco earthquake of 1906) within the next 30 years. <br /> <br />Map: Shake Intensity Map – San Andreas Fault M7.9 <br />(Source: USGS) <br />