Maps

The California Geological Survey has produced thousands of maps since its creation in 1860. This page provides links to the most popular CGS map products, organized by theme. We will continue to add more as time and resources permit.

Themes on this page:
Geologic Features | Geophysical Maps | Hazards | Mineral Resources | GIS Data

Geologic Features

Geophysical Maps

Hazards

Landslide Hazards

Mineral Hazards

Earthquake Faults, Shaking, Landsliding, and Liquefaction

Borehole Database Explorer (web application)
EQ Zapp: California Earthquake Hazards Zone Application (web application) - This is one of our most popular map products. Find out if your property is in an Alquist-Priolo Earthquake Fault Zone or Seismic Hazard Zone, or both.
Information Warehouse: Regulatory Maps and Reports (web application) - Find and download Earthquake Zones of Required Investigation Maps (EZRIM) in PDF and GIS format. EZRIM are maps that show Alquist-Priolo Earthquake Fault Zones or Seismic Hazard Zones, or both. This index also provides links to Seismic Hazard Zone Reports (SHZR) and Alquist-Priolo Fault Evaluation Reports (FER).
Preliminary Regulatory Maps and Reports
Fault Activity Map of California (web application)
Historic Earthquake "Felt Reports" Database and Map (web application)
Map Sheet 48: Earthquake Shaking Potential for California
Map Sheet 49: Epicenters of and Areas Damaged by M≥5 California Earthquakes, 1800-1999
Map Sheet 54: Faulting in California - Regular Edition (26x30 inches)
Map Sheet 54: Faulting in California - Educator's Edition (18x24 inches)
ShakeMaps
Strong-motion Earthquake Data and Reports

Tsunamis

Information Warehouse: Tsunami Hazard Area Map Web Application - Find and download tsunami hazard maps and evacuation maps.

Volcanic Hazards

To be added in the future.

Mineral Resources

Information Warehouse: Mineral Land Classification/SMARA Maps and Reports (web application) - Find and download mineral land classification/SMARA maps and reports in PDF.
Miscellaneous Map 9: Map of California Historic Gold Mines
Map Sheet 52: Aggregate Sustainability in California

GIS Data

Can't find the map you want?

The USGS National Geologic Map Database (NGMDB) is an excellent resource, where you can search for thousands of published geologic maps and reports from a variety of sources (including CGS). The NGMDB is a service provided by the United States Geological Survey.