San Francisco Bay Area Regional Database (BARD)

As of April 27, 2009, older formats of USGS data are no longer available with the exception of elevation (DEM) data. However, scanned historical 15-minute and 30-minute maps are still available. The site also has mosaicked (MrSid compressed) county orthoimagery and mosaicked San Francisco orthophotos from 1993 and 1946. Descriptions of these data types, what the data can be used for, and specific download instructions are all included on this Web site.

For more recent data, please visit the USGS Store or the National Map.

Spectacular satellite imagery of the San Francisco Bay Area

"Cooperative Research & Development between Pacific Gas & Electric Company and the USGS to promote informed decisions about reducing Earthquake Risks in the San Francisco Bay Area."

Portfolio of images of landscape, seascape and faults of the San Francisco Bay area

These images drape Landsat TM satellite imagery over Digital Elevation Models to show the bay as it has never been seen before. Earthquake fault lines are displayed in red.

All the images can be downloaded quickly for printing from your home computer on US Letter paper. Full size 6ft images can be downloaded or ordered from this site, or you can take a file to any good copy service bureau that offers a poster printing service.

USGS San Francisco Bay Region Geology and Geologic Hazards web site
A cooperative project with the California Geological Survey

Project members specialize in geologic mapping, landslide hazards analysis, geophysics, terrain modeling and analysis, paleontology, and Geographic Information Systems (GIS).

Through an understanding of the complex geology of the San Francisco Bay region, the Project seeks to assess geologic hazards such as landslides, earthquake-causing fault zones, and soil liquefaction due to ground shaking.

Visit the USGS San Francisco Bay Region Geology and Geologic Hazards web site to learn about and navigate through these topics:

• Geologic Map
• Quaternary-Active Fault Map
• Liquefaction Susceptibility Map
• San Francisco Bay Region Geology Website