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Do you have a hankering to learn more about the Hayward fault? There are a variety of tours - both virtual and field trip guides - available. There are also excellent maps to help you identify how close you live and work to the Hayward fault - and what seismic hazards such as landslides or liquefaction exist.

Tours

There are several excellent tour guides for the Hayward Fault. Since the Hayward fault creeps, there are numerous places where you can see evidence of the fault movement in the form of offset curbs and cracks in buildings.

Here are two published tour guides:

• Bortugno, E., Living on the fault: a field guide to the visible evidence of the Hayward Fault, BAREPP publications, 1988.
• Lienkaemper, J. Field Trip Guide to the Hayward Fault, USGS Open-File Report 89-500, 1989.

CSU Hayward has put together an excellent virtual tour of the Hayward fault:

• Tour of the Hayward Fault

In addition, the USGS has a tour available as a PDF file from their website:

• Hayward Fault Tour

The Hayward fault runs through the UC Berkeley campus and is most notable for crossing through Cal Memorial stadium.

• The Hayward Fault at UC Berkeley
• Field Trip Guide to the Hayward Fault at UC Berkeley
• The Geology of Bear Territory

Other examples of virtual field trips can be found at our FAQ on field trips.

Maps

The most detailed map of the Hayward fault was publised by the USGS in 1992. This map is only available in paper form, from the USGS.

• Lienkaemper, J., Map of recently active traces of the Hayward Fault, Alameda and Contra Costa Counties, California, USGS Miscellaneous Field Studies Map, Map MF-2196, 1992.

However, many USGS maps of the San Francisco Bay Area are available online. In particular,

• Geologic Map of the Hayward fault zone, Contra Costa, Alameda, and Santa Clara Counties, California: A digital database, USGS Open-File Report 95-597, 1995
• Seismic landslide hazard for the cities of Oakland and Piedmont, California

and there are lists of maps of Alameda, Contra Costa and Santa Clara counties.

In addition to the USGS maps, the California Geological Survey is developing a comprehensive set of maps under the Seismic Hazards Mapping Program. The maps identify areas of potential ground failure, including landslides and liquefaction. This program is in progress and not all areas of the San Francisco Bay have been mapped yet. Available maps (organized by USGS quadrangle) are available for downloading. Here is an incomplete list of the maps that include portions of the Hayward fault:

• Richmond
• Oakland West
• Oakland East
• San Leandro
• Hayward
• Redwood Point
• Newark

The Seismic Hazard Mapping Program was developed in response to 1990 legislation. It follows the Alquist Priolo Earthquake Fault Zoning Act, which was designed to identify fault rupture zones. The "AP" maps are available from CGS.

There are a number of excellent fault maps available in print. Here is a sampling of some great ones:

• Hart, E., Fault-Rupture Hazard Zones in California (Alquist-Priolo Special Studies Zones Act of 1972 with Index to Special Studies Zones Maps), CDMG Special Publication 42, 199 2.
• Jennings, C., Fault Activity Map of California and Adjacent Areas, GDM 6, 1994.
• Wagner, D., et al., Geologic Map of the San Francisco-San Jose Quadrangle, CDMG Reg ional Geological Map Series, 1990.

Berkeley Seismological Laboratory
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Last modified: Wed Sep 17 09:20:44 PDT 2008