The following maps are not interactive. If you have a high-speed internet connection (such as a DSL or cable modem) you may want to access these maps using our interactive (GIS) viewing software. This software allows you to type in an address or zip code, as well as to zoom into the maps.
Instructions for viewing a liquefaction hazard map
Liquefaction hazard is defined as a combination of liquefaction susceptibility and shaking that is strong enough to trigger liquefaction. Thus, to view an liquefaction hazard map of your area, you need to both select an area (city) and select a fault as the source of the earthquake. Note: only maps of the region, not individual cities, are available for the two thrust faults at this time.
STEP 1 – Choose a city from the first window.
Note: Maps for individual cities are only available for four earthquake scenarios at this time. If you select any of the other earthquake scenarios, you will still only get a map of the entire Bay Area. The four scenarios for which individual city maps are currently available are:
- North Hayward + South Hayward Segments of the Hayward-Rodgers Creek Fault System
- Rodgers Creek Segment of the Hayward-Rodgers Creek Fault System
- Santa Cruz Segment of the San Andreas Fault System
- Entire San Andreas Fault System
STEP 2 – Choose a fault source for the earthquake scenario using the map by clicking on a colored fault segment on the map or on the button next to the fault name. You should find that the most interesting scenarios are the ones involving multiple fault segments on the San Andreas and Hayward faults, as well as the faults near you. You may also want to review our list of Frequently Asked Questions (FAQs) that includes information on the probability of various earthquakes.
STEP 3 – Click on the View Map button at the bottom of this page.
