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California Hazard Maps

cgsCGS has developed a new online tool that allows you to search all of CGS’s Regulatory Maps, Landslide Maps and Tsunami Maps with related reports and GIS data.  The new tool is now officially accessible through CGS’s home page.  See below for a brief list of what the warehouse has to offer within each of the 3 categories.  You will want to bookmark this link as we continue to add more products to the warehouse.


Regulatory Maps include:

  • Alquist-Priolo Fault Zone Maps
  • Alquist-Priolo Fault Zones – GIS data
  • Fault Evaluation Reports
  • Seismic Hazard Zone Maps
  • Seismic Hazard Zone Reports
  • Seismic Hazard Zones – GIS data

Landslide Maps include:

  • Landslide Inventory Maps
  • Landslide maps (digital scans) from CGS Open-File Reports, Special Reports
  • Watershed Mapping Series Maps
  • Landslide Corridor Maps
  • This is not a complete list as we continue to add more

Tsunami Maps include:

  • Tsunami Inundation Zone Maps
  • Links to local resources for preparedness activities
Using GIS Data on this site

GIS Data downloaded from this site generally requires GIS software to view. Click here for a list of GIS Data Viewers

GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions

GIS Source Information
Database Name:
Feature Class Name:
Feature Dataset Name (if applicable):
Reference Date:
Accuracy: Parcel
Update Frequency: As Needed
Access Constraints:None

Contact Information

State of California
Department of Conservation

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