The Seismic Hazards Mapping Act of 1990 (Public Resources Code Sections 2690, et seq.) requires the California State Geologist to identify and map areas prone to seismic hazards (Seismic Hazard Zones) in order for cities and counties to adequately address public health and safety concerns.
If a property is located within a Seismic Hazard Zone, local governments may require that a qualified engineering specialist prepare a geotechnical report prior to approving any additional or new construction earthquake fault zones. Based on the findings in such a report, specific mitigation measures and building requirements may be imposed. In some cases, additional or new construction and development of the property may be severely limited.
Please be advised that not all properties located within a Seismic Hazard Zone are prone to seismic hazards, and that a single earthquake capable of causing liquefaction or triggering a landslide may not uniformly affect all areas within a Seismic Hazard Zone.
Futhermore, the fact that a property is not located within a Seismic Hazard Zone does not necessarily mean that the property is free from seismic hazards or that geologic or seismic activity will not occur on property in the future.