CGS Information Warehouse

​​​​The CGS Information Warehouse is a place to find and download selected reports, maps, and data published by the California Geological Survey. To get started, choose a link in the Themes section below, and click it. A new window will open containing an interactive map specific to that theme.


Regulatory Maps and Reports (Seismic Hazard and Fault zones)

Alquist-Priolo Site Investigation Reports

Landslide Maps and Reports

Tsunami Hazard Area Maps

Mineral Land Classification / SMARA Maps and Reports

Borehole Database

Tips for using the Information Warehouse maps

  • Read the map's welcome screen (if there is one); it provides important information.
  • The map will show geographic regions (typically a grid of USGS 7.5-minute quadrangles); click on one of these regions to view a popup with links to the available maps, reports, and/or data for that region. 
  • Type a place name in the map's search field (upper left corner of map) to help you find your location or quadrangle of interest.
  • Play with the controls in the upper left and right corners of each map.
  • Have fun exploring!

Please note, separate applications will be necessary to view or use downloaded content; for example, a PDF viewer is needed to view PDF files, and GIS software is needed to use GIS data.

Need Help?

Please direct any problems, questions or comments about the Information Warehouse to the GIS Coordinator.

 ‭(Hidden)‬ Custom CSS