Maps and Data

​​Printable Maps

Quadrangle-based indexes to printable maps and reports

  • Regulatory Maps and Reports Index
    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).
  • Landslide Maps and Reports Index
    Find and download landslide maps and reports in PDF.
  • Tsunami Inundation Zone Maps Index
    Find and download tsunami inundation zone maps in PDF.
  • Regional Geologic Maps Index
    This link will take you to the National Geologic Map Database (NGMDB) MapView portal, where you can find and download hundreds of published geologic maps from a variety of sources (including CGS). The NGMDB is a service provided by the United States Geological Survey.

​Interactive Web Maps and Data

  • Ma​p Data Layer Viewer
    Very versatile and popular! ​Map layers include Earthquake Shaki​ng Potential (CGS Map Sheet 48)​, Tsunami Inundation Zones,

 Other Map Resources

Can't find the map you need? The USGS National Geologic Map Database is an excellent resource.