|Three Revised Official Alquist-Priolo Earthquake Fault Zone Maps. Areas covered are within Los Angeles County and affect the cities of Arcadia, Los Angeles, Monrovia, Pasadena, San Marino, and South Pasadena. Click here to view or download the Official Maps. June 15, 2017|||
|Open File Report 79-18||Title II Geologic Data Compilation Project - Geology and Landslides in Selected North Coast Quadrangles of Northern California. Please click these links to bring up the individual pages: Forest and Watershed Geology Program Maps and GIS Data; San Francisco, San Jose and Santa Cruz; Ukiah and Santa Rosa; Weed and Redding. May 26, 2017|||
|||Updated Map Products for Alquist-Priolo Fault and Seismic Hazards Mapping Zones. The CGS Seismic Hazards Program is pleased to announce a complete revamping of all regulatory earthquake hazard zone GIS files available through the CGS Information Warehouse. A significant upgrade also has been made to PDF versions of zone maps – Alquist-Priolo fault rupture hazard zones have been combined with liquefaction and earthquake-triggered landslide zones in 7.5-minute quadrangles where multiple zone types exist. April 13, 2017|
|||The 2017 CGS Calendar is available for download. This year's calendar focuses on volcanoes, and it features photography by Mike Fuller with layout by Anita Carney. March 22, 2017||
|Special Report 230||
Geological Gems of California State Parks can be purchased from the CGS library. The hardcopy book includes two plates folded in a back cover pocket and costs $60.00. The two plates can be purchased separately as rolled posters and are available for $10.00 each ($20.00 for both). Free downloads are also available. February 1, 2017|
|Map Sheet 48 ||Earthquake Shaking Potential for California. CGS has updated the earthquake shaking potential map for California. A release statement, Map Sheet 48, and GIS Data are available for download. January 26, 2017|
|||Three revised Preliminary Alquist-Priolo Earthquake Fault Zone maps released. Areas covered are within Los Angeles County and affect the cities of Arcadia, Los Angeles, Monrovia, Pasadena, San Marino, and South Pasadena.
Click here for release statement. December 15, 2016||See official maps|
|Special Report 232||Radon Potential in Orange County, California. CGS has completed a radon potential study and report for Orange County, California. A release statement, the report, a radon potential map, and GIS data are available for download. July 14, 2016|
|||Five Preliminary Geologic Maps Released. New geologic maps of the Cayucos, Frazier Mountain, Irish Hill, and Morro Bay North 7.5 minute quadrangles and a newly compiled geologic map of the Pt. Sur 30x60 minute quadrangle are now available for download from the preliminary geologic maps page.||
|||Seven New and Revised Official Alquist-Priolo Earthquake Fault Zone Maps. June 10, 2016||
|Special Report 241||Maritime Tsunami Response Playbooks: Background Information and Guidance for Response and Hazard Mitigation Use is now available. January 29, 2016||Download|
Special Report 230
Geological Gems of California State Parks is available for download. This publication provides more than fifty short educational articles about the extraordinary geology of California's State Parks. January 29, 2016||
2016 CGS Calendar with photography by CGS geologist Jeremy Lancaster and layout by Anita Carney is available for download. January 29, 2016||
|||Seven proposed new and revised Preliminary Alquist-Priolo Earthquake Fault Zone maps released. Release statement, December 10, 2015||
|||Five Revised Official Alquist-Priolo Earthquake Fault Zone Maps Released. Areas covered include parts of Los Angeles County, San Bernardino County, Orange County, and Riverside County. December 4, 2015||
|Special Report 227 ||
Alluvial Fan Flooding Hazards: An Engineering Geologic Approach to Preliminary Assessment. November 17, 2015||
Five proposed revised Preliminary Alquist-Priolo Earthquake Fault Zone maps. June 4, 2015|| See official maps|
California's Non-Fuel Mineral Production for 2013. May 2015.||
|Special Report 231 ||
Update of Mineral Land Classification for Portland Cement Concrete-Grade Aggregate in the Temescal Valley Production Area, Riverside County, California. Release Statement,
Map Plate 1,
Map Plate 2, February 2015|
|Map Sheet 62 ||
Geology of Ring Mountain and Tiburon Peninsula, Marin County, California. See Release Statement. December 2014||$30.00|
|Map Sheet 61 ||
Geologic Map of Part of Eastern Placer County, Northern Sierra Nevada, California.
See Release Statement. November 2014||$30.00|
|Special Report 226 ||
Radon Potential in San Mateo County, California.
See release statement.
Click here to download the report pdf.
Click here for map. December 2014|
| Special Report 234||
Assessment of Post-Fire Runoff Hazards for Pre-Fire Hazard Mitigation Planning - Southern California.
See Release Statement.
Click here to download the report pdf. July 2014|
| Special Report 233||
Scenario Earthquake Hazards for the Long Valley Caldera-Mono Lake Area, East-Central California.
Click here to download the report pdf. June 2014|
California's Non-Fuel Mineral Production for 2012.
Click here to download the report pdf. April 2014|
| Special Report 224||
Radon Potential of the Palos Verdes Area, California.
See release statement.
Click here to download the report and map. January 2014||
|Special Report 205 ||
Update of Mineral Land Classification: Aggregate Materials in the North San Francisco Bay Production-Consumption Region, Sonoma, Napa, Marin, and Southwestern Solano Counties, California.
See release statement.
Click here to download the Report and Maps. December 2013|
|Map Sheet 60||
Geologic Map of the North Lake Tahoe - Donner Pass Region, Northern Sierra Nevada, California.See Release Statement.Click here for the map. October 2012||$25.00|
|Special Report 225||
The Oak Creek Post Fire Debris and Hyperconcentrated Flows of July 12, 2008, Inyo County, California: A Geologic Investigation.See Release Statement.Click for Report. July 2012||$30.00|
|Landslide Inventory Map||
Burbank and Hollywood 7.5-minute Quadrangle is released.See Release Statement.Click here to download the maps. April 2013||$12.00|
Map Sheet 52 (UPDATED 2012)
Aggregate Sustainability in California.See Release Statement. March 2013
|Special Report 217 (REVISED)||
Geologic Compilation of Quaternary Surficial Deposits in Southern California.See Release Statement.Click here for the report. January 2013|
|Seismic Hazard Zone Map||
Lick Observatory 7.5-minute Quadrangle is released.Click here to download the map. October 2012||
|Alquist-Priolo Fault Zone Maps|
Thirteen new and revised Official Alquist-Priolo Earthquake Fault Zone Maps Released.
Areas covered include parts of Alameda, Imperial, Riverside, San Diego, and Ventura counties. This release introduces a new graphic presentation of these regulatory zone maps. September 2012
|Special Report 225||
The Oak Creek Post Fire Debris and Hyperconcentrated Flows of July 12, 2008|
Inyo County, California: A Geologic Investigation.
See Release Statement.Click here for the report. July 2012