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CGS Seismic Hazards Program: Liquefaction Zones

Liquefaction Zones (Map or Tile Service)This is a digital Seismic Hazard Zone Map presenting areas where liquefaction and landslides may occur during a strong earthquake. Three types of geological hazards, referred to as seismic hazard zones, may be featured on the map: 1) liquefaction, 2) earthquake-induced landslides, and 3) overlapping liquefaction and earthquake-induced landslides. In addition, a fourth feature may be included representing areas not evaluated for liquefaction or earthquake-induced landslides. Developers of properties falling within any of the three zones may be required to investigate the potential hazard and mitigate its threat during the local permitting process.

Data files

Data title and descriptionAccess dataFile detailsLast updated

OGC WFS

DownloadOGC WFS
09/23/24

OGC WMS

DownloadOGC WMS
09/23/24

CSV

Download
CSV
02/19/24

GeoJSON

DownloadGEOJSON
02/19/24

Shapefile

DownloadZIP
02/19/24

KML

DownloadKML
02/19/24

Supporting files

Data title and descriptionAccess dataFile detailsLast updated

ArcGIS Hub Dataset

HTML
09/23/24

ArcGIS GeoService

ARCGIS GEOSERVICES REST API
08/11/23

API endpoint

Dataset Name

Use the query web API to retrieve data with a set of basic parameters. Copy the API endpoint you need to start.

Usage documentation