Where readers ask and we try to answer:
Can you tell me how I can get a map of all the SF neighborhoods that would show me what areas are bedrock vs. landfill.
First, you’ll want to know your Seismic Hazard Zones.
Then, you’ll want to get in there a bit further and really have a look. You can find this map at http://geomaps.wr.usgs.gov/sfgeo/liquefaction/susceptibility.html.
Here is another liquefaction map that you can also peruse. This one you can zoom in to street level. Remember, red=bad.
Hope this helps. I’m sure there are some readers that might even know of better maps, so let’s hope they chime in.
Thanks for reading and thanks for asking.
[Update: this high resolution photo taken after the 1906 Quake is amazing.]