This data set represents Alquist-Priolo Earthquake Fault Zones based on the 1972 act that addresses seismic hazard of surface fault rupture by prohibiting the placement of most structures for human occupancy across the traces of active faults. The data depicted in this set should be used to advice sellers and real-estate agents whether property being sold is within an Earthquake Fault Zone.
This data is considered electronic facsimiles of the Official Alquist-Priolo Earthquake Fault Zone Maps as were compiled by the Department of Conservation and the California Geological Survey. Preliminary review and official fault-zone maps can be found at www.conservation.ca.gov/cgs