Maps

Faults and Earthquake Probability Maps

• Bay Area Earthquake Probabilities

  U.S. Geological Survey (USGS) and other scientists estimate the probability of at least one magnitude 6.7 or greater quake striking the San Francisco Bay region before 2032.

• Digital Map of the Hayward Fault

  Map showing active fault traces within the Hayward Fault Zone, including a virtual tour of the Hayward fault in the east San Francisco Bay Region that can be viewed in the Google Earth ^TM.

• sfbayquakes.org

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

Shaking Hazard Maps

• Soil Type and Shaking Hazard in the San Francisco Bay Area

  Interactive map showing shaking hazard and earthquake fault in the San Francisco Bay Area.
  See also: Shakemap PGA And PGV Station Corrections, calculated using the Northern California Shakemap data set, show the relative amplification of earthquake waves.

• Alameda County

  Digital database identifying areas in the Oakland, California region that could amplify ground shaking from earthquakes.

Liquefaction Hazard Maps

• San Francisco Bay Area

  These maps offer better tools to assess risk from earthquake damage in the densely populated section of the San Francisco Bay area.

• Alameda County

  Digital database identifying areas in the Oakland, California region that could produce surface liquefaction during a M 7.1 earthquake on the Hayward Fault.

• Northern Santa Clara Valley

  Liquefaction hazard maps for three earthquake scenarios for the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos, Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale, Northern Santa Clara County, California

Geology Maps

• San Francisco Bay Region Geology and Geologic Hazards

  Access to geologic, Quaternary-active fault, and liquefaction susceptibility maps, including additional information, images, downloads, and links.