How do I find fault or hazard maps for California?
An online map of faults (Quaternary Fault and Fold Database of the United States) that includes California is in the Faults section of the Earthquake Hazards Program website. Choose the Interactive Fault Map, or download KML files and GIS shapefiles from the links on the page.
USGS hazard maps, data, and tools for California and other parts of the United States are in the Seismic Hazard Maps and Site-Specific Data section of the Earthquake Hazards Program website.
The California Geological Survey has a number of Geologic Maps and Data including:
- Geologic Map of California
- Alquist-Priolo Earthquake Fault Zone Maps
- Earthquake Hazards Zone Application (EQ Zapp)
- Landslide Maps
- Watershed Maps
- Topographic Maps
Related
Why are there so many faults in the Quaternary Faults Database with the same name? Why are there so many faults in the Quaternary Faults Database with the same name?
Many faults are mapped as individual segments across an area. These fault segments are given a different value for name, number, code, or dip direction and so in the database each segment occurs as its own unique entity. For example, the San Andreas Fault has several fault segments, from letters a to h, and fault segment 1h has segments with age of last fault movement from historic (<150 years) to...
Related
Why are there so many faults in the Quaternary Faults Database with the same name? Why are there so many faults in the Quaternary Faults Database with the same name?
Many faults are mapped as individual segments across an area. These fault segments are given a different value for name, number, code, or dip direction and so in the database each segment occurs as its own unique entity. For example, the San Andreas Fault has several fault segments, from letters a to h, and fault segment 1h has segments with age of last fault movement from historic (<150 years) to...