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Introduction > Laws and
Guidelines
A cooperative project with the California Geological Survey
Laws and Guidelines
New Structures/Developments
Local jurisdictions are required by California
law to implement the Seismic
Hazard Mapping Act ,
which requires that sites within "Zones of Required
Investigation" be
investigated for liquefaction and/or landslide hazard before structures for human
occupancy are built.
Real Estate Disclosure/Existing Structures
The California
Natural Hazards Disclosure Act ,
requires that sellers of real property and their agents provide prospective
buyers with a "Natural Hazard Disclosure Statement" when
the property being sold lies within one or more hazard areas delineated
on maps prepared by the California Geological Survey for individual
7.5-minute quadrangles. Liquefaction Seismic Hazard Zones and Earthquake-Induced
Landslide Zones are shown together on Seismic
Hazard Zones maps ; Earthquake
Fault Zones are shown on Earthquake
Fault Zone maps .
The California Geological Survey (CGS) is charged with producing the
Seismic Hazard
Zones maps ,
which define zones of required investigation for liquefaction and earthquake-generated
landslides. CGS provides information on the regulations
and guidelines relating to liquefaction .
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