The United States Geological Survey launched an amazing Web site where you can watch simulations of the big shake that rocked the San Francisco Bay Area in 1906. From the project overview:
To better understand the distribution of shaking and damage that accompanied the great 1906 earthquake, seismologists have constructed new computer models to recreate the ground motions. The simulations show how ground moved on the two sides of the San Andreas fault and how seismic waves radiated away from the fault to produce the shaking. The earthquake, which began 2 miles offshore from the City of San Francisco, ultimately grew to cause shaking and damage along more than 300 miles of the San Andreas Fault.
Link (Thanks, Paul Saffo!)
Kindle