This weekend, in an attempt to expand my earthquake I.Q., I came upon this page
on the US Geological Survey website. It features simulations illustrating ground motion on both sides of the San Andreas fault, and how seismic waves radiated away from the fault to produce ground shaking during the 1906 quake.
You can also take close-up views by Bay Area city, or compare the ground motion between the '06 and Loma Prieta quakes. I found the simulations quite hypnotic, almost like the spacey feeling you get when peering too long into a kaleidoscope.
Do you want to see more? Check out this site
, which uses USGS' technology to simulate how different Bay Area landmarks would shake if they were subjected to the 1906 quake. Creepy.

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