San Jose liquefaction map

A new map released by the California Geological Survey shows seismic hazard zones for certain areas of San Mateo and Contra Costa counties, specifically liquefaction and landslide zones. Hazard Zone Map for the San Jose West 7.5-minute Quadrangle, Santa Clara County, California.

Landslide-prone areas are marked in light blue… The area includes the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos Milpitas, Mountain View, Palo … Bay Area seismic maps The Seismic Hazards Mapping Act (Act) of 1990 (Public Resources Code, Chapter 7.8, Section 2690-2699.6) directs the Department of Conservation to identify and map areas prone to earthquake hazards of liquefaction, earthquake-induced … The map displays the boundaries of Zones of Required Investigation for liquefaction and earthquake-induced landslides over an area of approximately 60 square miles at a scale of 1 inch San Andreas Fault M 7.8 Scenario. The highest hazard areas shown by the liquefaction hazard maps are concentrated in regions of man-made landfill, especially fill that was placed many decades ago in areas that were once submerged bay floor. Contact Us. Maps showing the probability of surface manifestations of liquefaction in the northern Santa Clara Valley were prepared with liquefaction probability curves. This map shows the likelihood of liquefaction in Northern Santa Clara County during a magnitude 7.8 earthquake on the northernmost segments of the San Andreas Fault. DOC Maps: Geologic Hazards The California Geological Survey, a division within the California Department of Conservation, provides data and analysis of California's seismic and geologic hazards. Map users may search for a … The area includes the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale. The map predicts the approximate percentage of each designated area that will liquefy and show surface manifestations of liquefaction such as sand boils and ground cracking. Preliminary maps of Quaternary deposits and liquefaction susceptibility, nine-county San Francisco Bay region, California: a digital database: USGS: OF 00-444: 275: Lettis, W.R. 1982: Late Cenozoic stratigraphy and structure of the western margin of the San Joaquin …

The liquefaction zones shown in dark green are well-known — landfill areas including the Marina, Fisherman's Wharf, Dogpatch and South of Market.

Faults Earthquakes occur when forces underground cause the faults beneath us to rupture and suddenly slip.

(A more detailed map of the Marina's liquefaction zones can be found here. Name of Quadrangle Date of Release of State SHZ Map Date of Revision of County GHZs Maps; San Jose East: 01/17/2001: 02/26/2002: Calaveras Reservoir: 10/17/2001 Such areas along the Bay margins are found in San Francisco, Oakland and Alameda Island, as well as other places around San Francisco Bay. Map users may search for a … This earthquake is similar to the 1906 San Francisco earthquake. Staff Directory


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