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CGS Seismic Hazards Program: Unevaluated Areas
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... -
Tank
This online map displays facility sites in group or by facility types in separate layers: 1. All facility types in separate layers including tank, tank setting, pit, and... -
CGS Information Warehouse: Mineral Land Classification Maps (SMARA Study Areas)
Mineral Land Classification studies are produced by the State Geologist as specified by the Surface Mining and Reclamation Act (SMARA, PRC 2710 et seq.) of 1975. To address... -
WellSTAR Oil and Gas Facilities: Boundaries
This online map displays facility sites in group or by facility types in separate layers: Facility Boundary layer digitized by CalGEM to show the areas that delineate... -
California Important Farmland: 1992
Established in 1982, Government Code Section 65570 mandates FMMP to biennially report on the conversion of farmland and grazing land, and to provide maps and data to local... -
California Important Farmland: 1996
Established in 1982, Government Code Section 65570 mandates FMMP to biennially report on the conversion of farmland and grazing land, and to provide maps and data to local... -
CGS Map Sheet 48: Historic Earthquakes, 1769 to 2015 - California (Magnitude...
Epicenters of known M≥5 earthquakes from 1769 to 2016 are shown for California and a 100 km area bordering the state. Earthquakes are grouped by: M = 5-6; M = 6-7; M = 7+. -
Pit/Sump
This online map displays facility sites in group or by facility types in separate layers: 1. All facility types in separate layers including tank, tank setting, pit, and... -
CalGEM: Geothermal Wells
This online map represents geothermal wells regulated by the Geologic Energy Management Division. CalGEM is the Geologic Energy Management Division of the California Department... -
WellSTAR Underground Gas Storage: Project Boundaries
This online map displays California’s active Underground Gas Storage (UGS) projects and wells associated to UGS projects. Project data and well data are provided by CalGEM’s... -
CGS Mineral Hazards: Indoor Radon Potential Zones
This digital layer contains polygons (vector format) of portions of California designated as having high, moderate, low, or unknown potential for homes to exceed the U.S. EPA... -
CGS Information Warehouse: Landslide Maps and Reports
Since the 1960's, the California Geological Survey (CGS) has produced numerous maps that show landslide features and delineate potential slope-stability problem areas.... -
Northeastern Hydrologic Benchmark Network (HBN) Soil Chemistry and Catskill...
This data product contains soil chemistry data from 4 locations. Two of the locations were located in the Neversink River watershed near Claryville, NY (01435000) in the... -
Post Primacy Aquifer Exemptions
This post primacy aquifer exemption data depicts areas exempted by the US EPA for Class II injection after the March 14, 1983 Primacy agreement between the US EPA and CalGEM.... -
Oil and Gas Field Administrative Boundaries
Administrative boundaries for oil and gas fields in California.CalGEM is the Geologic Energy Management Division of the California Department of Conservation, formerly the... -
WellSTAR Oil and Gas Facilities: Tank Settings
This online map displays facility sites in group or by facility types in separate layers: including tank settings.CalGEM is the Geologic Energy Management Division of the... -
California Important Farmland: 1992
Established in 1982, Government Code Section 65570 mandates FMMP to biennially report on the conversion of farmland and grazing land, and to provide maps and data to local... -
Acid Matrix
This online map locates the wells that have NOI records in the CalGEM WellSTAR database, and provides well NOI information including operator, lease, Notice of Intention (NOI),... -
California Important Farmland: 1984
Established in 1982, Government Code Section 65570 mandates FMMP to biennially report on the conversion of farmland and grazing land, and to provide maps and data to local... -
Acid Matrix
This online map locates the wells that have NOI records in the CalGEM WellSTAR database, and provides well NOI information including operator, lease, Notice of Intention (NOI),...