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 below based on your desired theme, and click it. A new tab will open containing an interactive map specific to that theme.
Please read the map's welcome screen; 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.
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.
- Read the directions for each map.
- Play with the controls in the upper left and right corners of each map.
- Have fun exploring!
Please direct any problems, questions or comments about the Information Warehouse to the