The CGS Information Warehouse is a place to find and download selected reports, maps, and data published by the California Geological Survey.
Choose a link in the Themes section below, and click it. A new window will open containing an interactive map specific to that theme.
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!
Regulatory Maps and Reports (Seismic Hazard Zones and Alquist-Priolo Earthquake Fault Zones)
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.
Please direct any problems, questions or comments about the Information Warehouse to the