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.

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Filter Total Items: 577
Date published: January 1, 2017

Contour--Offshore of Point Conception Map Area, California

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

Date published: January 1, 2017

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

Projected Hazard: 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.
Model Summary: The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of sto

Date published: January 1, 2017

Reprocessed boomer 3D seismic-reflection data of field activity P-04-11-CC in Estero Bay, offshore of Morro Bay, central California, 2012-08-12 to 2012-10-05

This dataset includes reprocessed boomer 3D seismic data collected by the Fugro Consultants Inc. in 2012, in Estero Bay, offshore of Morro Bay, central California.

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.,...

Date published: January 1, 2017

Digital map of hydrothermal alteration type, key mineral groups, and green vegetation of the northwestern United States derived from automated analysis of ASTER satellite data

Mineral groups identified through automated analysis of remote sensing data acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) were used to generate a map showing the type and spatial distribution of hydrothermal alteration, other exposed mineral groups, and green vegetation across the northwestern conterminous United States. Boolean algebra was used to

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: 20-year storm 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

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 water-level projections: 100-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

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 flood-hazard projections: 100-year storm in Ventura 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 SPB14 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 water-level projections: 100-year storm in Ventura 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

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: 100-year storm 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

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

Maximum depth of flooding surface (in cm) in the region landward of the present day shoreline that is inundated for the storm condition and sea-level rise (SLR) scenario indicated. Note: Duration datasets may have occasional gaps in open-coast sections.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of k

Filter Total Items: 450
Publication Thumbnail
Year Published: 1977

Combined Ice and Water Balances of Maclure Glacier, California, South Cascade Glacier, Washington, and Wolverine and Gulkana Glaciers, Alaska, 1967 Hydrologic Year

Combined ice and water balances were measured in the 1967 hydrologic year (October 1-September 30) on four glaciers in western North America ranging in latitude from 37 deg to 63 deg N. This hydrologic year was characterized by heavier than normal winter precipitation in California and Washington and abnormally dry winter conditions in coastal...

Tangborn, Wendell V.; Mayo, Lawrence R.; Scully, David R.; Krimmel, Robert M.
Combined Ice and Water Balances of Maclure Glacier, California, South Cascade Glacier, Washington, and Wolverine and Gulkana Glaciers, Alaska, 1967 Hydrologic Year; 1977; PP; 715-B; Tangborn, Wendell V.; Mayo, Lawrence R.; Scully, David R.; Krimmel, Robert M.

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Year Published: 1975

Geohydrologic Reconnaissance of the Imperial Valley, California

Loeltz, Omar J.; Irelan, Burdge; Robison, J.H.; Olmsted, F.H.
Geohydrologic Reconnaissance of the Imperial Valley, California; 1975; PP; 486-K; USGS NUMBERED SERIES; Water Resources of Lower Colorado River-Salton Sea Area; Loeltz, O. J.; Irelan, Burdge; Robison, J. H.; Olmsted, F. H.

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Year Published: 1973

Geohydrology of the Needles area, Arizona, California, and Nevada

Metzger, D.G.; Loeltz, Omar J.
Geohydrology of the Needles area, Arizona, California, and Nevada; 1973; PP; 486-J; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Metzger, D. G.; Loeltz, O. J.

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Year Published: 1973

Geohydrology of the Parker-Blythe-Cibola area, Arizona and California

Metzger, D.G.; Loeltz, Omar J.; Irelan, Burdge
Geohydrology of the Parker-Blythe-Cibola area, Arizona and California; 1973; PP; 486-G; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Metzger, D. G.; Loeltz, O. J.; Irelan, Burdge

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Year Published: 1973

Geohydrology of the Yuma area, Arizona and California

Olmsted, F.H.; Loeltz, Omar J.; Irelan, Burdge
Geohydrology of the Yuma area, Arizona and California; 1973; PP; 486-H; USGS NUMBERED SERIES; Water resources of Lower Colorado River-Salton Sea area; Olmsted, F. H.; Loeltz, O. J.; Irelan, Burdge

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Year Published: 1970

Physiographic diagrams of parts of the continental borderlands of California and Alaska: 12 physiographic diagrams: Southern California Borderland; Eastern Murray Fracture Zone and Transverse Ranges; Southern Monterey Bay; Monterey Canyon; Central San

Alpha, Tau Rho
Physiographic diagrams of parts of the continental borderlands of California and Alaska: 12 physiographic diagrams: Southern California Borderland; Eastern Murray Fracture Zone and Transverse Ranges; Southern Monterey Bay; Monterey Canyon; Central San; 1970; OFR; 70-5; Alpha, Tau Rho

Filter Total Items: 1,120
May 25, 2017

PubTalk 5/2017 — Underwater secrets of the Hayward fault zone

Title: Underwater Secrets of the Hayward Fault Zone: Integrated 3D imaging to understand earthquake hazards 

  • Underwater imaging provides a unique opportunity to study urban fault hazards.
  • How do we link surface structures to depths where earthquakes occur?
  • How does "acoustic trenching" help us understand earthquake history?
View of a beach from up high on a roof with a pier, gentle waves, lots of people on the sand, amusement park in background.
May 18, 2017

Santa Cruz Main Beach

Still-image from video camera atop the Dream Inn looks eastward over Main Beach and boardwalk in Santa Cruz, CA.

Man in orange vest stands knee-deep in stream with a net
May 15, 2017

An ecologist uses a net to collect a sample of aquatic invertebrates

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, an ecologist uses a net to collect a sample of aquatic invertebrates for ennumeration and identification.

Stormwater flows from a graffiti-decorated outfall into urban Sausal Creek
May 14, 2017

Urban outfall to Sausal Creek

Graffiti adorns an outfall pipe discharging stormwater into Sausal Creek. Sausal Creek was one of the many urban creeks sampled by the Regional Stream Quality Assessment (RSQA).

Hydrologic technician holds up tile colonized by biofilm
May 13, 2017

Biofilms colonize a deployed tile

Biofilms take up pesticides in streams. Here, a hydrologic technician hold ups an unglazed ceramic tile that has been colonized by biofilm over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

Attribution: Water Resources
Two men are waist-deep in a creek
May 13, 2017

Hydrologic technicians survey and record streambed characteristics

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, two hydrologic technicians record characteristics of stream habitat.

Hydrologic technician collects biofilm from a ceramic tile
May 13, 2017

Biofilms colonize a deployed tile

Biofilms take up pesticides in streams. Here, a hydrologic technician collects a sample of biofilm that has colonized an unglazed ceramic tile over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

Hydrologic technician collects biofilm from a ceramic tile
May 13, 2017

Biofilms colonize a deployed tile

Biofilms take up pesticides in streams. Here, a hydrologic technician collects a sample of biofilm that has colonized an unglazed ceramic tile over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

Superimposed on beach photo: dense grid of blue dots across sandy beach and over ocean. Ditto 3 lines that cross the shore.
May 13, 2017

“Pixel instruments” on photo of beach in Santa Cruz, California

Frame from video of Cowells Beach in Santa Cruz, California, showing “pixel instruments” measured continuously during the video and used to estimate different coastal processes. The blue dots represent an array of pixels used by a computer program called cBathy to estimate seafloor depths (bathymetry). The red, orange, and yellow lines are cross-shore arrays of pixels used

...
With gloved hands and tweezers, folding a water filter
May 12, 2017

A hydrologist carefully folds a filter used to collect an eDNA sample

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologist carefully folds a filter used to collect a sample for analysis of eDNA.

Nasturtiums hang down over a graffiti-decorated culvert conveying Sausal Creek
May 12, 2017

Urban creek graced by flowers and graffiti

Flowers and graffiti turn urban Sausal Creek into a bizarre wonderland. Water-quality and ecological surveys were done at the creek as part of the USGS Regional Stream Quality Assessment (RSQA) in the summer of 2016.

Man standing ankle-deep in creek takes notes
May 12, 2017

A hydrologic technician records stream habitat characteristics

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologic technician records characteristics of the habitat of a highly urbanized stream.

Filter Total Items: 980
USGS science for a changing world logo
December 1, 2011

Differences in seismic activity along the San Andreas fault appear to be related to strength variations in the lower crust and upper mantle, as suggested by new findings in the Dec. 1 edition of Nature. 

CalVO staff assembled in the Rambo Auditorium, Menlo Park, CA...
November 30, 2011

During FY11, Long Valley Observatory's jurisdiction was expanded to encompass all California volcanoes and one volcanic center in Nevada. The Observatory's name will change to California Volcano Observatory (CalVO), which will correspond to a new website launch in early 2012.

USGS science for a changing world logo
November 15, 2011

New insights from recent Glen Canyon Dam high-water flow experiments on the Colorado River will be shared by USGS scientists on Wednesday night. They will discuss the results from these high-water flows in Grand Canyon National Park and describe the challenge of adaptively managing a highly regulated river.

USGS science for a changing world logo
November 7, 2011

Nearly 124,000 high resolution scans of the more than 200,000 historical USGS topographic maps, some dating as far back as 1884, are now available online. TheHistorical Topographic Map Collection includes published U.S. maps of all scales and editions, and are offered as a georeferenced digital download or as a scanned print from the USGS Store.

USGS science for a changing world logo
November 2, 2011

USGS scientists and academic colleagues investigated how California's interconnected San Francisco Bay and Sacramento-San Joaquin Delta (the Bay-Delta system) is expected to change from 2010 to 2099 in response to both fast and moderate climate warming scenarios. 

USGS science for a changing world logo
November 2, 2011

USGS scientists and academic colleagues investigated how California's interconnected San Francisco Bay and Sacramento-San Joaquin Delta (the Bay-Delta system) is expected to change from 2010 to 2099 in response to both fast and moderate climate warming scenarios. 

USGS science for a changing world logo
November 1, 2011

An hour-and-a-half program on Thursday evening highlights four different U.S. Geological Survey research projects. Scientists will talk about their recent scientific discoveries in non-technical terms for the general public.

USGS science for a changing world logo
October 28, 2011

It may seem like a barren, lifeless rock with only the haunting memories of the past, but a battle for survival continues each year on Alcatraz Island.

USGS science for a changing world logo
October 25, 2011

A hike along the Hayward Fault, a Science Crawl through San Francisco’s Mission District pubs and cafes, and a workshop on the birds of Alcatraz with U.S. Geological Survey scientists are among the many ways USGS is participating in the upcoming Bay Area Science Festival.

USGS science for a changing world logo
October 13, 2011

Dr. David Shelly, a research seismologist with the U.S. Geological Survey, was named one of President Obama's recipients of the Presidential Early Career Award for Scientists and Engineers, the highest honor bestowed by the United States government on science and engineering professionals in the early stages of their independent research careers.

USGS science for a changing world logo
October 4, 2011

Dr. Elizabeth Cochran, a geophysicist with the U.S. Geological Survey, was named one of President Obama’s recipients of the Presidential Early Career Awards for Scientists and Engineers, the highest honor bestowed by the United States government on science and engineering professionals in the early stages of their independent research careers. 

USGS science for a changing world logo
September 28, 2011

Groundwater pumping, which has been increasing since the 1940s, now accounts for about one third of the estimated annual flow from the aquifers of the eastern Great Basin. In parts of this region, groundwater pumping exceeds the rate of natural discharge, leading to land subsidence and declines in water levels and spring flow.