Unified Interior Regions

California

The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 418
Date published: July 26, 2016
Status: Active

National Park Service Visitor Spending Effects

The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports a considerable amount of economic activity within park gateway communities. USGS economists collaborate with the National Park Service social science program to estimate NPS...

Date published: July 21, 2016
Status: Active

Using Quantile Regression to Investigate Ecological Limiting Factors

Unexplained heterogeneity in statistical models of animal responses to their physical environment is reasonable to expect because the measured habitat resources are a constraint on—but not the sole determinant of—abundance, survival, fecundity, or fitness. The ecological understanding and reliability of management predictions based on animal habitat models can be improved by shifting focus ...

Date published: July 21, 2016
Status: Active

North American Waterfowl Management Plan

The ultimate success of North American Waterfowl Management Plan (NAWMP) depends on maintaining relevance to stakeholders and society. In order to be relevant, a first step is to better understand what people value in regard to waterfowl and their habitats. 

Date published: July 19, 2016
Status: Completed

Quantitative and Statistical Research Collaboration

Mathematical and statistical models are powerful research tools that play several important roles in conceptualizing and understanding the structure and dynamics of complicated ecological systems, including developing mechanistic hypotheses pertaining to ecological systems, designing studies that elucidate ecosystem structure and function, and extracting information from data.

Date published: June 27, 2016
Status: Active

Using Cell Technology to Track Species Movement

The Information Science Branch explored and developed ways to track species locations using a standard cellular phone network. This technology provides more tracking data at a faster rate and lower cost than traditional satellite tracking systems. The initial implementation of this approach currently provides support for the California Condor recovery program and is being extended to include...

Contacts: Gail Montgomery
Date published: April 13, 2016

Understanding Coastal Change

Scientists perform a range of studies that document, assess, and model coastal change, risk, and vulnerability. Studies include historical shoreline change, the geologic structure and history of coastal regions, sediment supply and transport, sea-level rise, and how extreme storm events affect rates and impacts of coastal change.

Date published: April 13, 2016

Geologic Hazards and Catastrophic Events

We study the distribution and hazard potential of coastal and submarine events such as earthquakes and submarine landslides and associated tsunami potential, hurricane induced coastal inundation, extreme storms, sea-level rise and oil and gas spills. We also model development to help evaluate and forecast coastal hazard probability and occurrence.

Date published: April 13, 2016

Ocean Resources for America's Needs

Our scientists conduct research studies focused on geologic mapping, sampling and understanding of mineral and energy resources and studies of the geologic setting and processes to inform renewable energy development offshore.

Date published: April 12, 2016
Status: Active

USGS Library

The USGS Library, managed by CSAS&L, supports all fundamental scientific research conducted within USGS. It serves both internal and external customers with comprehensive access to literature, data, and information necessary understand USGS mission areas and make critical decisions about how to proceed with research initiatives and investigations in the earth and natural sciences.

Date published: March 17, 2016

Volcano Hazards Assessments Help Mitigate Disasters

The Volcano Hazards Program develops long-range volcano hazards assessments. These includes a summary of the specific hazards, their impact areas, and a map showing ground-hazard zones. The assessments are also critical for planning long-term land-use and effective emergency-response measures, especially when a volcano begins to show signs of unrest.

Date published: March 9, 2016
Status: Active

California Water Science Center

The Center's mission is to collect and analyze hydrologic data needed to manage water resources for the State of California. The CAWSC operates local and statewide networks to collect high-quality data that define natural and human hydrologic changes; analyzes hydrologic processes; maintains data bases; and publishes peer-reviewed reports to create unbiased hydrologic information.

Attribution:
Date published: March 9, 2016
Status: Active

Geology, Minerals, Energy, and Geophysics (GMEG) Science Center

Scientists at the GMEG Science Center work on issues related to geologic processes and mineral and energy resource potential, primarily in the western United States. The science staff includes geologists, geophysicists, geochemists, biologists, geospatial information specialists, and remote sensing specialists who are located in offices in several western states.

Attribution:
Filter Total Items: 575
Date published: September 20, 2017

Near-surface wind fields for San Francisco Bay--historical and 21st-century projected time series

To support CoSMoS in the San Francisco Bay, time series of historical and 21st-century near-surface wind fields (eastward and northward wind arrays) were simulated throughout the Bay. While global climate models provide useful projections of near-surface wind vectors into the 21st century, resolution is not sufficient enough for use in regional wave modeling projects, such as CoSMoS. Short-...

Date published: September 1, 2017

National Water Information System web interface (NWISweb)

The National Water Information System (NWIS) web application provides access to real-time and historical surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Date published: August 30, 2017

California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010

This is a comma separated values (CSV) file used to conduct the logistic quantile regression analyses in R provided by Cade et al. (2017). The data set consists of records of California spotted owl fledgling counts on 88 territories on the Lassen National Forest, CA from 1991-2010. Climatic condition data were obtained from PRISM and landscape habitat data were obtained from LANDFIRE.

Date published: August 24, 2017

Coastal Change Hazards Portal

Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Displays probabilities of coastal erosion.

Date published: August 4, 2017

San Diego Hydrogeology Data Map

Map of the San Diego Hydrogeology project study area with links to groundwater and surface water data for each of the monitoring sties. 

Date published: July 17, 2017

Multichannel sparker and minisparker seismic-reflection data of USGS field activity 2014-645-FA collected in the outer Santa Barbara Channel, California, between 2014-11-12 to 2014-11-25 (ver. 2.0, March 2020)

This data release contains 35 multichannel sparker and 24 multichannel minisparker seismic reflection (MCS) profiles that were collected in November of 2014 from the Catalina and Santa Cruz Basins offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center. Data were collected aboard the University of California’s R/V Robert Gordon Sproul on

Date published: July 17, 2017

Chirp seismic-reflection data of USGS field activity 2014-645-FA collected in the outer Santa Barbara Channel, California, between 2014-11-12 to 2014-11-25 (ver. 2.0, March 2020)

This data release contains 43 chirp sub-bottom profiles that were collected in November of 2014 from the Catalina and Santa Cruz Basins offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center. Data were collected aboard the University of California’s R/V Robert Gordon Sproul on USGS cruise 2014-645-FA. Chirp profiles were collected to assess

Date published: June 7, 2017

Bathymetry and acoustic backscatter data of the Sacramento River, from the Feather River to Knights Landing, California in February, 2011

On February 1, 2011, the USGS Pacific Coastal and Marine Science Center team carried out a project using interferometric sidescan sonar to characterize the riverbed and channel banks of a 12 mile reach of the Sacramento River near the town of Knights Landing, California (River Mile 79 through River Mile 91). The project was developed in coordination with the US Army Corps of Engineers as part...

Date published: May 26, 2017

Data from Earthquake-Induced Landslide Hazards for a M7.0 Scenario Earthquake on the Hayward Fault

The seismic-landslide probability map covers the counties of Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Santa Cruz, Solano, and Sonoma. The slope failures are triggered by a hypothetical earthquake with a moment magnitude of 7.0 occurring on April 18, 2018, at 4:18 p.m. on the Hayward Fault in the east bay part of California’s San Francisco Bay region.

Attribution: Natural Hazards
Date published: May 18, 2017

California Basin Characterization Model: A Dataset of Historical and Future Hydrologic Response to Climate Change

Input datasets for the the Basin Characterization Model, including precipitation, temperature, evapotranspiration, soil profile, climatic water deficit, runoff and recharge.

First release: 2014
Second release: 2017, (WY2011-WY2016 Update)

Date published: April 19, 2017

Minisparker seismic-reflection data of field activity S-12-10-SC: Oceanside to La Jolla, offshore southern California from 2010-06-01 to 2010-06-12

This dataset includes raw and processed, high-resolution seismic-reflection data collected in 2010 to collect information on active offshore faults. The survey area is offshore southern California between Oceanside and La Jolla. The data were collected aboard USGS R/V Parke Snavely. The seismic-reflection data were acquired using a SIG 2mille minisparker. Subbottom acoustic penetration spanned...

Date published: April 19, 2017

Minisparker seismic-reflection data of field activity S-07-11-SC: offshore San Diego, and Los Angeles Counties, southern California from 2011-06-08 to 2011-06-22

This dataset includes raw and processed, high-resolution seismic-reflection data collected in 2011 to collect information on active offshore faults. The survey area is offshore southern California between Long Beach and San Diego. The data were collected aboard USGS R/V Parke Snavely. The seismic-reflection data were acquired using a SIG 2mille minisparker system. Subbottom acoustic...

Filter Total Items: 446
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Year Published: 2000

A seismic landslide susceptibility rating of geologic units based on analysis of characterstics of landslides triggered by the 17 January, 1994 Northridge, California earthquake

One of the most significant effects of the 17 January, 1994 Northridge, California earthquake (M=6.7) was the triggering of thousands of landslides over a broad area. Some of these landslides damaged and destroyed homes and other structures, blocked roads, disrupted pipelines, and caused other serious damage. Analysis of the distribution and...

Parise, M.; Jibson, Randall W.

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Year Published: 1999

Maps Showing Locations of Damaging Landslides Caused by El Nino Rainstorms, Winter Season 1997-98, San Francisco Bay Region, California

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. Reports of landsliding began in early January 1998 and continued throughout the winter and spring. On February 9, President Clinton declared all 10 counties eligible for...

Godt, Jonathan W.
Maps Showing Locations of Damaging Landslides Caused by El Nino Rainstorms, Winter Season 1997-98, San Francisco Bay Region, California; 1999; MF; 2325; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Alameda County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. In Alameda County more than $20 million in damages were assessed. Debris flows occurred...

Coe, J.A.; Godt, J.W.; Brian, Dianne; Houdre, Nicolas
Map showing locations of damaging landslides in Alameda County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-B; Coe, J. A.; Godt, J. W.; Brian, Dianne; Houdre, Nicolas

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Year Published: 1999

Map showing locations of damaging landslides in Contra Costa County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $27 million in damages were assessed in Contra Costa County.

Graymer, Russell W.; Godt, Jonathan W.
Map showing locations of damaging landslides in Contra Costa County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-E; Graymer, Russell W.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Marin County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $2.5 million in damages were assessed in Marin County.

Morrissey, Meghan M.; Wieczorek, Gerald F.; Godt, Jonathan W.
Map showing locations of damaging landslides in Marin County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-C; Morrissey, Meghan M.; Wieczorek, Gerald F.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Napa County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. Napa County was relatively unaffected in comparison to other counties in the region...

Godt, Jonathan W.; Savage, William Z.; Wilson, Raymond C.
Map showing locations of damaging landslides in Napa County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-A; Godt, Jonathan W.; Savage, William Z.; Wilson, Raymond C.

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Year Published: 1999

Map showing locations of damaging landslides in San Francisco City and County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $4 million in damages were assessed in San Francisco City and County.

Hillhouse, John W.; Godt, Jonathan W.
Map showing locations of damaging landslides in San Francisco City and County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-G; Hillhouse, John W.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in San Mateo County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $55 million in damages were assessed in San Mateo County. The only fatality...

Jayko, Angela S.; De Mouthe, Jean; Lajoie, Kenneth R.; Ramsey, David W.; Godt, Jonathan W.
Map showing locations of damaging landslides in San Mateo County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-H; Jayko, Angela S.; De Mouthe, Jean; Lajoie, Kenneth R.; Ramsey, David W.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Santa Clara County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $7.6 million in damages were assessed in Santa Clara County.

Ellis, William L.; Harp, Edwin L.; Arnal, Caroline H.; Godt, Jonathan W.
Map showing locations of damaging landslides in Santa Clara County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-J; Ellis, William L.; Harp, Edwin L.; Arnal, Caroline H.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Santa Cruz County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $14.5 million in damages were assessed in Santa Cruz County.

Baum, Rex L.; Schuster, Robert L.; Godt, Jonathan W.
Map showing locations of damaging landslides in Santa Cruz County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-D; Baum, Rex L.; Schuster, Robert L.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Solano County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $13.5 million in damages were assessed in Solano County.

Howell, David G.; Godt, Jonathan W.
Map showing locations of damaging landslides in Solano County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-I; Howell, David G.; Godt, Jonathan W.

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Year Published: 1999

Map showing locations of damaging landslides in Sonoma County, California, resulting from 1997-98 El Nino rainstorms

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $21 million in damages were assessed in Sonoma County.

Ramsey, David W.; Godt, Jonathan W.
Map showing locations of damaging landslides in Sonoma County, California, resulting from 1997-98 El Nino rainstorms; 1999; MF; 2325-F; Ramsey, David W.; Godt, Jonathan W.

Filter Total Items: 1,119
A woman shows a young child how she uses sediment sieves.
December 9, 2017

Sifting sand with sieves

Research geologist Amy East (left) shows a budding geologist how to sift sand to determine its size during our Open House in Santa Cruz, California.

Two young children sit on top of machines that are not moving, in a yard.
December 9, 2017

Posing for pictures

Posing for pictures on personal watercraft during the USGS Open House in Santa Cruz in December, 2017 was very popular.

A man wearing glasses talks into a microphone while gesturing with his hand.
December 9, 2017

Talking to the news

Open house organizer Rex Sanders explains the wide range of USGS research for a TV interview. Screen capture from KION video.

A young boy sits atop a personal watercraft on the lawn outside a USGS building.
December 9, 2017

Checking out the personal watercraft

A future personal watercraft captain checked out the controls on a beautiful December day in Santa Cruz.

A man on left talks to a news reporter who holds a microphone while he speaks.
December 9, 2017

USGS talks to reporter

KION-TV reporter Ashley Keehn (right) asked PCMSC Director Guy Gelfenbaum about why we held this open house.

A crowd of people stand in a lobby talking in small groups and looking at various exhibits.
December 9, 2017

USGS Santa Cruz open house

Visitors and staff filled our lobby for several hours.

A woman holding a video camera on a tripod aimed at another woman who's pointing at something and talking to a young student
December 9, 2017

TV camera records scene at Open House

Emma Kelsey (right) explained seabird biology to visitors as a TV camera recorded the scene. 

A man and two women crouch around a table with a computer screen that one of the women is pointing to while she talks.
December 9, 2017

Sharing information on the screen

Visitors watched closely as Alicia Balster-Gee (in green vest) presented our research on marine geohazards in Alaska.

A woman facing the camera talks to two men with their backs to the camera.
December 9, 2017

USGS Open House discussions

Members of the PCMSC Marine Minerals Team, including physical science technician Kira Mizell (center), took turns describing the importance of seafloor minerals.

A man at right talks about and gestures at a rock on a table to another man who is squatting in front of the rock.
December 9, 2017

Talking about seafloor mineral deposits

Research geologist Jim Hein (right) gave a hands-on explanation of seafloor mineral deposits.

A woman kneeling on the floor helps a young girl try on tall adult-sized rubber boots, for fun.
December 9, 2017

Try these on for size

Li Erikson (right) helped a young visitor try on the tall boots needed for Alaskan coastal research.

A man at right talks with another man and woman about an image projected on a screen.
December 9, 2017

Drone discussion

The drone on the table helped map a giant Big Sur landslide that closed California’s Highway 1. Josh Logan (right) described the process to visitors.

Filter Total Items: 979
USGS
August 20, 2013

A new interagency report provides a plan for long-term scientific monitoring and assessment for California's Salton Sea. Monitoring of the Salton Sea ecosystem is critical for informed decision making and the success of restoration efforts. 

USGS
August 13, 2013

When California State University, East Bay demolishes its seismically unsafe Warren Hall on Aug. 17 on its Hayward campus, the landmark building's implosion will produce energy similar to a small earthquake that can be used to study and map the nearby Hayward Fault. 

USGS
August 9, 2013

Science and technology have peeled back a veil of water just offshore of California, revealing the hidden seafloor in unprecedented detail. New imagery, specialized undersea maps, and a wealth of data from along the California coast are now available.

USGS
July 26, 2013

A study on frogs in remote Sierra Nevada mountain habitats including Yosemite National Park and Giant Sequoia National Monument, detected concentrations of pesticides in frog tissue that potentially came from California's Central Valley sources. 

USGS
July 11, 2013

Initial findings will support a USGS hydrologic model to better understand area water-supply issues
 

Carbon dioxide gas detection instrument installed at Horseshoe Lake...
July 2, 2013

Since 1990, high levels of carbon dioxide (CO2) in the soil have killed trees within about a 75-acre area adjacent to Horseshoe Lake on the south side of Mammoth Mountain.

USGS
June 27, 2013

When it comes to weekend activities, many people make the tough choice between recreation and spending their time volunteering.  But recently, The Nature Conservancy and the U.S. Geological Survey (USGS) gave a group of local anglers a chance to do both at once.  

Plots of earthquakes over time in Long Valley, CA. Top is number o...
June 18, 2013

In the late afternoon of 17 June 2013 a flurry of earthquakes started in the Long Valley Caldera east of the town of Mammoth Lakes, California (in an area known to geologists as the south moat).

USGS
May 28, 2013

North America's largest vulture, the California condor, once graced the skies of the Pacific Northwest from northern California to British Columbia and was deeply woven into the fabric of many Native American cultures. A new book by two federal scientists documents the condors history in the region, from prehistoric times to the early 20th century.

USGS
May 23, 2013

Urban Seismic Studies to Begin in East San Francisco Bay Area — About 30 seismic sensors are seeking a place to hang out for up to three years in the greater Pleasanton/Dublin/San Ramon, Calif., area. 

USGS
April 3, 2013

New scientific findings published in Ecology reveal that interactions of climate, soils, shrubs, and a natural nitrogen fertilization process affect regrowth of forests following wildfire in southern Oregon and northern California. Managers can use this information to consider post-fire management practices, including fertilization and shrub-removal.

USGS
March 29, 2013

Barium and nitrate were detected at high concentrations in 5 percent of untreated groundwater used for public-water supply in the San Francisco Bay region, while human-made organic chemical constituents were found at high concentrations in less than 1 percent.