ABAG Map Services

Hazard Planning
Earthquakes - Shaking

Shaking Scenarios - Projected intensities from shaking scenarios generated for the San Francsico Bay Region by the US Geological Survey.

Probabilistic Seismic Hazard Analysis - Composite shaking hazard across the Bay Area based on all earthquake scenarios and probability information using the Modified Mercalli Intensity (MMI) scale. Shows likely shaking intensity in the Bay Area in any 50 year period from all possible faults. A 10% in 50 years probability was chosen as it most closely aligns with current building standards in the California Building Code.

Earthquakes - Liquefaction
Liquefaction Susceptibility - areas subject to liquefaction during an earthquake

Liquefaction Hazard Areas - liquefaction hazard areas mapped by the California Geological Survey

Earthquakes - Faults
Alquist-Priolo Earthquake Fault Zones - California Geological Survey data of Alquist-Priolo Earthquake Fault Zones

Flood Hazard Areas - areas identified on FEMA Flood Insurance Rate Maps

Wildland-Urban Interface - threat areas for the wildland-urban interface

Wildfire Threat - wildland fire threat to human development

Fire Perimeters - extents of previous wildfires in the San Francisco Bay Area

Existing Landslides - distribution of existing landslides induced by rainfall/storms

Debris Flow Source Areas - debris flow source areas for rainfall/storm induced landslides

Landslide Hazard Areas - earthquake induced landslide hazard areas mapped by the California Geological Survey

Tsunami Planning Areas - areas at risk of inundation during a tsunami event. Actual location and extent of inundation would depend on strength and direction of tsunami.

For more information on Hazard Preparedness and Planning visit ABAG's Earthquake website.


San Francisco Bay Trail
Bay Trail Map - Bay Trail alignment around San Francisco Bay.