California Institute of Technology Seismological Laboratory
- Investigates, researches, and informs the public about earthquakes that occur in Southern California and worldwide.
- http://www.gps.caltech.edu/seismo/earthquakes.html

USGS: Latest Quake Info - Northern California
- Real-time maps with topography and fault names, measured ground motion and shaking intensity. Also has hazards forecasts, seismogram displays, and an index of important past earthquakes.
- http://quake.usgs.gov/recent/index.html

Southern California Earthquake Center (SCEC) Data Center
- The data center maintains a searchable archive of earthquake data for research in seismology and earthquake engineering. Includes general information, clickable fault maps, stations and instrumentation, and educational resources.
- http://www.data.scec.org/

USGS Pasadena CA Field Office
- Real-time information and archives of past earthquakes and seismic hazards in Southern California, plus preparedness, research and monitoring.
- http://earthquake.usgs.gov/regional/sca/

Seismic Hazard Zonation Program
- Map index designed to assist cities and counties in protecting the public safety from the effects of earthquake-triggered ground failure. Issued by the California Department of Conservation.
- http://www.conservation.ca.gov/cgs/shzp/

The Daly City Earthquake of 1957
- Describes the Daly City (California) Earthquake of 1957, including eyewitness reports and a WAV sound recording.
- http://www.winwaed.com/sci/daly/dalycity.shtml

Latest California Seismic Events
- Earthquake map for California, including recent earthquake magnitude, depth, and location information. Updated every minute.
- http://quake.usgs.gov/recenteqs/latestfault.htm

The Next Big Earthquake
- Informational pamphlet about San Francisco Bay Area earthquakes.
- http://quake.wr.usgs.gov/prepare/future/

Hayward Fault Tour
- This photographic tour follows the Hayward fault, picturing some of the most easily recognized surface features, progressing from Fremont to San Pablo Bay, California.
- http://www.mcs.csuhayward.edu/~shirschf/tour-1.html

Museum of the City of San Francisco
- History museum site features several exhibits about historical San Francisco earthquakes. Includes a collection of newspaper clippings, police reports, eyewitness accounts and photos.
- http://www.sfmuseum.org/

Redwood City (California) Public Seismic Network
- Earthquake data files, links to other Public Seismic Network sites around the world, links to other sources of on-line information on seismology, seismic equipment, and earthquakes.
- http://psn.quake.net/