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Seismic Shaking Hazard Maps of California

 Historic Earthquakes (1800-1994) with Magnitudes 5 and Greater

The rate of historic earthquakes is used to estimate the rate of future earthquakes in calculating the probability of earthquake shaking.

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Shaking damage at Santa Rosa City Hall from the April 1906 San Francisco earthquake (Magnitude 7.9). Photo from Steinbrugge Collection, Earthquake Research Center, University of California, Berkeley.


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