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.

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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