US Geological Survey, Earthquakes and Seismicity: http://quake.wr.usgs.gov/

US Geological Survey, Landslides: http://landslides.usgs.gov/

UC Davis Geology Department: http://www.geology.ucdavis.edu/~cowen/geologynews.html

ABAG Liquefaction Maps and Information: http://www.abag.ca.gov/bayarea/eqmaps/liquefac/liquefac.html/

ABAG Fault Rupture Hazard Information: http://www.abag.ca.gov/bayarea/eqmaps/faults/

Seismo-Watch, Inc: http://www.seismo-watch.com/