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: 577
Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC13 Bay shallows stations in San Pablo Bay and China Camp Marsh, California

Files contain hydrodynamic and sediment transport data for the location and deployment indicated. Time-series data of water depth, velocity, turbidity, and temperature were collected in San Pablo Bay and China Camp Marsh as part of the San Francisco Bay Marsh Sediment Experiments. Several instruments were deployed in tidal creek, marsh, mudflat, and Bay locations, gathering data on

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: average conditions in Ventura County

Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for So

Date published: January 1, 2017

Seasonal vegetation characteristics in a Spartina foliosa- and Salicornia pacifica-dominated salt marsh at China Camp State Park

As part of the San Francisco Bay Marsh Sediment Experiments and hydrodynamic investigations in San Pablo Bay and China Camp Marsh, California, vegetation sampling measurements were taken over several periods at numerous locations. This portion of the data release presents physical characteristics and percent cover data from vegetation plots sampled in China Camp State Park salt marsh (north...

Date published: January 1, 2017

Reprocessed boomer 3D seismic-reflection data of field activity P-04-11-CC, in San Luis Obispo Bay, offshore of Pismo Beach, central California, 2011-12-06 to 2012-10-05

This dataset includes reprocessed boomer 3D seismic data collected by the Fugro Consultants Inc. in 2012, in San Luis Obispo Bay, offshore of Pismo Beach, central California.

Date published: January 1, 2017

Faults--Offshore of Gaviota Map Area, California

This part of DS 781 presents fault data for the geologic and geomorphic map of the Offshore of Gaviota map area, California. The vector data file is included in "Faults_OffshoreGaviota.zip," which is accessible from https://doi.org/10.5066/F7TH8JWJ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R.,...

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 flood-hazard projections: 1-year storm in Orange County

Geographic extent of projected coastal flooding, low-lying vulnerable areas, and maxium/minimum flood potential (flood uncertainty) associated with the sea-level rise and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosi

Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from SPA14 Bay shallows stations in San Pablo Bay and China Camp Marsh, California

Files contain hydrodynamic and sediment transport data for the location and deployment indicated. Time-series data of water depth, velocity, turbidity, and temperature were collected in San Pablo Bay and China Camp Marsh as part of the San Francisco Bay Marsh Sediment Experiments. Several instruments were deployed in tidal creek, marsh, mudflat, and Bay locations, gathering data on

Date published: January 1, 2017

Bathymetry hillshade--Offshore of Point Conception Map Area, California

This part of DS 781 presents data for bathymetry for several seafloor maps of the Offshore of Point Conception Map Area, California. The vector data file is included in "Bathymetry_OffshorePointConception.zip," which is accessible from https://doi.org/10.5066/F7QN64XQ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P...

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 ocean-currents projections: 20-year storm in Ventura County

Model-derived ocean current velocities (in meters per second) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS

Date published: January 1, 2017

Bathymetry hillshade--Offshore of Gaviota Map Area, California

This part of DS 781 presents data for bathymetry for several seafloor maps of the Offshore of Gaviota Map Area, California. The vector data file is included in "BathymetryHS_OffshoreGaviota.zip," which is accessible from https://doi.org/10.5066/F7TH8JWJ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R...

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 water-level projections: 1-year storm in Orange County

Model-derived total water levels (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Souther

Date published: January 1, 2017

Geology and geomorphology--Offshore of Point Conception Map Area, California

This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Point Conception map area, California. The vector data file is included in "Geology_OffshorePointConception.zip," which is accessible from https://doi.org/10.5066/F7QN64XQ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P.,...

Filter Total Items: 450
Publication Thumbnail
Year Published: 1987

Comparison of estimates of evapotranspiration and consumptive use in Palo Verde Valley, California

Estimates of evapotranspiration and consumptive use by vegetation in Palo Verde Valley, California, were compared for calendar years 1981 to 1984. Vegetation types were classified, and the areas covered by each type were computed from Landsat satellite digital-image analysis. Evapotranspiration was calculated by multiplying the area of each...

Raymond, Lee H.; Owen-Joyce, Sandra J.
Comparison of estimates of evapotranspiration and consumptive use in Palo Verde Valley, California; 1987; WRI; 87-4071; Raymond, Lee H.; Owen-Joyce, Sandra J.

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Year Published: 1987

Estimates of consumptive use and ground-water return flow using water budgets in Palo Verde Valley, California

Palo Verde Valley, California, is an agricultural area in the flood plain of the Colorado River where irrigation water is diverted from the river and groundwater is discharged to a network of drainage ditches and (or) the river. Consumptive use by vegetation and groundwater return flow were calculated using water budgets. Consumptive use by...

Owen-Joyce, Sandra J.; Kimsey, Steven L.
Estimates of consumptive use and ground-water return flow using water budgets in Palo Verde Valley, California; 1987; WRI; 87-4070; Owen-Joyce, Sandra J.; Kimsey, Steven L.

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Year Published: 1986

Evapotranspiration estimates using remote-sensing data, Parker and Palo Verde valleys, Arizona and California

In 1981 the U.S. Geological Survey established an experimental project to assess the possible and practical use of remote sensing data to estimate evapotranspiration as an approximation of consumptive use in the lower Colorado River flood plain. The project area was in Parker Valley, Arizona. The approach selected was to measure the areas covered...

Raymond, L.H.; Rezin, K.V.
Evapotranspiration estimates using remote-sensing data, Parker and Palo Verde valleys, Arizona and California; 1986; OFR; 86-67; Raymond, L. H.; Rezin, K. V.

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Year Published: 1986

Reconnaissance bathymetry of basins occupied by Pleistocene Lake Lahontan, Nevada and California

No abstract available. 

Benson, Larry V.; Mifflin, Martin D.
Reconnaissance bathymetry of basins occupied by Pleistocene Lake Lahontan, Nevada and California; 1986; WRI; 85-4262; Benson, Larry V.; Mifflin, Martin D.

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Year Published: 1986

Water-use information for California

This pamphlet reports on the availability of water use information to and for the state of California, through the development of the State Water-Use Data System (SWUDS). SWUDS is currently organized into 12 water use categories: Agricultural non-irrigation; Commercial; Domestic; Industrial; Irrigation; Mining; Power generation--fossil fuel,...

Templin, W.E.
Water-use information for California; 1986; OFR; 86-483; Templin, W. E.

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Year Published: 1984

A method for estimating ground-water return flow to the Colorado River in the Palo Verde-Cibola area, California and Arizona

Owen-Joyce, Sandra J.
A method for estimating ground-water return flow to the Colorado River in the Palo Verde-Cibola area, California and Arizona; 1984; WRI; 84-4236; Owen-Joyce, Sandra J.

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Year Published: 1984

A method for estimating ground-water return flow to the Colorado River in the Parker area, Arizona and California

Leake, S.A.
A method for estimating ground-water return flow to the Colorado River in the Parker area, Arizona and California; 1984; WRI; 84-4229; Leake, S. A.

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Year Published: 1984

Hydrochemical data for the Truckee River drainage system, California and Nevada

Benson, Larry V.
Hydrochemical data for the Truckee River drainage system, California and Nevada; 1984; OFR; 84-440; Benson, Larry V.

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Year Published: 1983

A hydrochemical reconnaissance study of the Walker River basin, California and Nevada

During 1975 and 1976, a large number of water and sediment samples were collected from the Walker River Basin. Additional surface water samples were collected during 1980 and 1981. Data are given herein for chemical analyses of snowmelt, tributary, river, spring, well, lake, reservoir, lake sediment pore fluid, tufa, lake and river sediment...

Benson, L. V.; Spencer, R.J.
A hydrochemical reconnaissance study of the Walker River basin, California and Nevada; 1983; OFR; 83-740; Benson, L. V.; Spencer, R. J.

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Year Published: 1983

A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California

Loeltz, Omar J.; Leake, S.A.
A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; 1983; WRI; 83-4220; Loeltz, O. J.; Leake, S. A.

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Year Published: 1983

A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; executive summary

Loeltz, Omar J.; Leake, S.A.
A method for estimating ground-water return flow to the lower Colorado River in the Yuma area, Arizona and California; executive summary; 1983; WRI; 83-4221; Loeltz, O. J.; Leake, S. A.

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Year Published: 1978

Historic ground failures in Northern California triggered by earthquakes

A major source of earthquake-related damage and casualties in northern California has been ground failures generated by the seismic shaking, including landslides, lateral spreads, ground settlement, and surface cracks. The historical record shows that, except for offshore shocks, the geographic area affected and the quantity and general severity...

Youd, T. Leslie; Hoose, Seena N.
Historic Ground Failures in Northern California Triggered by Earthquakes; 1978; PP; 993; Youd, T. Leslie; Hoose, Seena N.

Filter Total Items: 1,120
Profiles of the front edge of a landslide at water's edge along a cliff.
June 28, 2017

3D Point Cloud Profiles at Landslide Toe

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
A series of images shows the height of a landslide and how it erodes over time.
June 28, 2017

Mud Creek landslide shoreface erosion

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
June 22, 2017

PubTalk 6/2017 — Effects of Climate Change: A Scientific Path Forward

Title: The Effects of Climate Change: A Scientific Pathway Forward

  • The frequency of extreme and unpredictable weather events is increasing.
  • What are the effects of an increase or decrease in carbon emissions?
  • What is scientific research projecting for the future of climate change?
A series of images showing a steep cliff along the coast from two different dates and the change between them.
June 14, 2017

Mud Creek 2017 May 27-June 13 Erosion View 2

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
A series of images showing a steep cliff along the coast from two different dates and the change between them.
June 14, 2017

Mud Creek 2017 May 27-June 13 Erosion View 3

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
A series of images show the height of the ground and how it changes over 17 days.
June 14, 2017

Mud Creek landslide "pyramid rock" profile and shoreface erosion

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
A series of images showing a steep cliff along the coast from two different dates and the change between them.
June 14, 2017

Mud Creek 2017 May 27-June 13 Erosion View 1

In 2017, the massive Mud Creek landslide buried a quarter-mile of the famous coastal route, California’s Highway 1, with rocks and dirt more than 65 feet deep. USGS monitors erosion along the landslide-prone cliffs of Big Sur, collecting aerial photos frequently throughout the year. By analyzing overlapping photos, they made precise maps of the slopes and calculated

...
Illustration shows how photos over a landslide are used to create a digital model for comparison over time.
May 31, 2017

Measuring topographic change with 4D photogrammetry

Provisional data subject to revision. From the USGS Remote Sensing Coastal Change Project, illustration describes how the USGS measures topographic change with 4D photogrammetry utilizing the techniques of Warrick et al., 2017. A digital terrain model of a coastal cliff is shown with its ground control points. The figure shows the locations in space where aerial

...
A series of images takes a tour of the area of a large catastrophic landslide and shows the unstable slope before the event.
May 31, 2017

Mud Creek topographic point clouds

Imagery shows topographic point clouds from photos, first from September 11, 2015 courtesy of California Coastal Records Project, second from March 8, 2017 (USGS photo), third from May 19, 2017 (USGS photo), and fourth from May 27, 2017 (USGS photo) 7 days following the catastrophic Highway 1 landslide. Last image shows the change in topography from the 2015 photo

...
3D maps created by computer processing of air photos show what the Mud Creek area looked like before and after the landslide
May 27, 2017

3D maps of air photos show views from before and after the landslide

Topographic “point clouds” (or 3D maps) created by computer processing of air photos show what the Mud Creek area looked like on March 8, 2017 (top), May 19 (center), and May 27 (bottom).

View from the sky of a steep mountainous coastline with a massive landslide that's taken out the road.
May 27, 2017

Mud Creek landslide May 27 2017

View from an airplane looking at the Mud Creek landslide on the Big Sur coast that occurred May 20, 2017.

Filter Total Items: 980
USGS
May 7, 2012

CONTRA COSTA COUNTY, Calif. -- For the first time, scientists have measured the amounts of mercury flowing into the San Francisco estuary from tidal wetlands using a new technique that can measure concentrations of mercury in water every few minutes, which is essential for understanding mercury flows in a complex tidal estuarine environment. 

USGS
May 3, 2012

MENLO PARK, Calif. – Education and entertainment await visitors of all ages at the U.S. Geological Survey's Menlo Park Campus Open House on Saturday, May 19 and Sunday, May 20, from 10 a.m. to 4 p.m.

USGS
April 16, 2012

Building an Earthquake Early Warning System for California

USGS
March 22, 2012

SAN DIEGO —Organic solvents were detected at high concentrations in 18 percent of the aquifer system used for public supply in the San Fernando and San Gabriel basins. However, groundwater is not directly used as drinking water; water purveyors may treat groundwater before delivering it to customers to ensure compliance with water quality standards.

USGS
March 20, 2012

MENLO PARK, Calif. Decisions made by the global community about emissions will directly impact the future of the western United States.  On March 22nd, Tom Suchanek, U.S. Geological Survey climate change coordinator, will discuss how increasing atmospheric carbon dioxide might affect human land-use and environmental systems in California and the Bay Area. 

USGS
March 8, 2012

MENLO PARK, Calif.— The El Mayor-Cucapah earthquake in northern Baja California, Mexico on April 4, 2010 triggered surface movement on several Southern California faults. Detailed mapping of these small movements by the U.S. Geological Survey, California Geological Survey, and other institutions, revealed previously unknown faults in the greater Salton Sea area...

USGS
February 29, 2012

SACRAMENTO, Calif.— Scientists at the U.S. Geological Survey have, for the first time, demonstrated how aquifer composition can affect how excessive levels of phosphorous (an essential nutrient contained in fertilizers) can be carried from fertilized agricultural fields via groundwater to streams and waterways. 

USGS
February 27, 2012

Waterfowl in California can spread low pathogenic avian influenza viruses during summertime when wetland temperatures are warm and waterfowl densities are low, according to a recent U.S. Geological Survey study.

USGS
February 21, 2012

MENLO PARK, Calif. — The U.S. Geological Survey and National Weather Service have developed the new FloodPath mapping system which allows scientists to produce maps of tomorrow's floods today – up to 3 days in advance of rising floodwaters.

USGS
February 9, 2012

The U.S. Geological Survey announces the establishment of the USGS California Volcano Observatory, or CalVO, headquartered within existing USGS facilities in Menlo Park, Calif. Establishing CalVO will increase awareness of and resiliency to the volcano threats in California, many of which pose significant threats to the economy and well being of the state and its inhabitants.

USGS
January 24, 2012

MENLO PARK, Calif. — Lassen Peak, the southernmost active volcano in the Cascade Range, erupted explosively in 1915 devastating nearby areas and sending volcanic ash as far away as 200 miles to the east.

Meeting between California Emergency Management Agency, CalVO, and ...
January 10, 2012

Welcome to the new USGS California Volcano Observatory website! The USGS Volcano Science Center recently restructured observatory operations to optimize volcano monitoring, eruption forecasting, and hazard mitigation efforts throughout California.