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: 377
Date published: March 3, 2016

"Get your science used--Six guidelines to improve your products"

This USGS Circular addresses the challenges natural scientists face when communicating their science to people outside their fields and, based on the expertise of social scientists and other risk communicators, provides guidelines to those seeking to improve their products.

Date published: March 3, 2016
Status: Completed

Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data

Legacy data (n) - Information stored in an old or obsolete format or computer system that is, therefore, difficult to access or process. (Business Dictionary, 2016) For over 135 years, the U.S. Geological Survey has collected diverse information about the natural world and how it interacts with society. Much of this legacy information is one-of-a-kind and in danger of being lost forever...

Date published: March 2, 2016

USGS California Volcano Observatory (CalVO)

CalVO operates real-time volcano monitoring networks, disseminates forecasts and notifications of significant activity, assesses volcano hazards, researches volcano processes, and works with communities to prepare for volcanic eruptions in California and Nevada. The Observatory is located at USGS offices in Menlo Park, California.

Date published: December 23, 2015
Status: Active

Estimating Natural Flows for Hydrologic Reference Streams

Scientists develop metrics of expected hydrological conditions at ungaged sites throughout Callifornia 

Date published: May 1, 2015
Status: Completed

Seismology in the City

Release Date: May 1, 2015

How seismologists can use noise to see under the ground.

Contacts: William J Stephenson, Lisa A Wald, Steve Hartzell, Morgan Moschetti, Jack Odum, Robert Williams, David Worley
Date published: February 23, 2015
Status: Active

Application of the SmeltCam to Describe Processes Influencing Delta Smelt Distribution and Movements

The California Water Science Center's "SmeltCam" helps describe processes influencing Delta Smelt distribution and movement.

Date published: January 1, 2015
Status: Active

Understanding Influences on Habitat Quality for Delta Smelt and Other Imperiled Fish Populations

USGS scientists work to provide information needed to evaluate the efficacy of ongoing U.S. Burueau of Reclamation water management efforts in Bay-Delta.

Date published: August 4, 2014
Status: Completed

California Water Use, 2010

In 2010, Californians withdrew an estimated total of 38 billion gallons of water per day, compared with 46 billion gallons per day in 2005.

Contacts: Justin Brandt
Date published: May 15, 2014
Status: Active

Physical and Biological Drivers of Longfin Smelt Vertical Distribution

Research scientists study conditions that affect abundance and distributions Longfin Smelt fish population.

Date published: April 19, 2014
Status: Active

Aftershock Forecast Communication for Risk Reduction

Studies of the communication of aftershock information during the Canterbury, New Zealand earthquake sequence conducted by Hazards Societal Consequences and Risk Communication team members and collaborators in New Zealand are...

Date published: September 4, 2013
Status: Completed

SAFRR Tsunami Scenario

The third SAFRR scenario is initiated by a magnitude 9.0 megathrust earthquake in the eastern Aleutian Islands, an event presenting a hypothetical but plausible distant-tsunami threat to southern and central California. USGS and other federal and state agencies entities developed the SAFRR Tsunami Scenario. The scenario describes wave heights, current velocities and inundation for the coast of...

Filter Total Items: 501
Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC13 Bay channel station 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

Habitat--Offshore of Point Conception Map Area, California

This part of DS 781 presents data for the habitat map of the Offshore of Point Conception Map Area, California. The vector data file is included in "Habitat_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., Cochrane, G.R.,...

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 ocean-currents projections: 100-year storm in Orange 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

Contour--Offshore of Gaviota Map Area, California

This part of DS 781 presents data for bathymetric contours for several seafloor maps of the Offshore of Gaviota Map Area, California. The vector data file is included in "Contours_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.,...

Date published: January 1, 2017

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

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

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 flood-hazard projections: 100-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

Acoustic Backscatter of the Sacramento River, from the Feather River to Knights Landing, California in February 2011

This part of the data release presents acoustic backscatter data collected on February 1, 2011, in the Sacramento River from the confluence of the Feather River to Knights Landing. The data were collected by the USGS Pacific Coastal and Marine Science Center (PCMSC) team with collaboration and funding from the U.S. Army Corp of Engineers. This project used interferometric sidescan sonar t

Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC16 Bay channel 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: 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

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

Filter Total Items: 351
Publication Thumbnail
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

Publication Thumbnail
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

Publication Thumbnail
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: 961
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

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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.

Hydro-tech in front of graffiti defacing a wall channelizing a stream
May 12, 2017

Graffiti at Sausal Creek

A hydrotech prepares to collect a water-quality sample at urban Sausal Creek, with its distinctive graffiti. 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.

Two adjacent poles holding video cameras near top, one control box near bottom, one man holding small tool near control box.
May 12, 2017

Beach-monitoring video cameras atop hotel in Santa Cruz, California

USGS ocean engineer Gerry Hatcher (left) and USGS postdoctoral oceanographer Shawn Harrison make adjustments to a computer controlling two video cameras on the roof of the Dream Inn, a 10-story hotel overlooking Monterey Bay in Santa Cruz, California. One camera looks eastward over Santa Cruz Main Beach and boardwalk, and the other southward over Cowells Beach. Since May

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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.

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.

Urban creek with concrete banks
May 12, 2017

Concrete channelization of urban creek

Sausal Creek in central Oakland, California, is an urban creek that has been extensively modified for flood control. The USGS Regional Stream Quality Assessment assessed the water quality and ecological integrity of small streams like Sausal Creek in five major regions of the country. Learn more about flow modification of U.S

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Urban creek with concrete banks
May 12, 2017

Concrete channelization of urban creek

Sausal Creek in central Oakland, California, is an urban creek that has been extensively modified for flood control. The USGS Regional Stream Quality Assessment assessed the water quality and ecological integrity of small streams like Sausal Creek in five major regions of the country. Learn more about flow modification of U.S

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A man walks knee-deep in stream next to outfall pipe
May 11, 2017

A geomorphologist walks a stream as part of an ecological survey

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a geolomorphologist assesses stream banks.

Filter Total Items: 925
USGS
September 25, 2012

MENLO PARK, Calif. — During the last week of September, Sea Otter Awareness Week focuses public attention on sea otters, while serving to promote various conservation programs and research activities.

USGS
September 18, 2012

SAN DIEGO, Calif. — Solvents and other constituents - arsenic, uranium, and nitrate - were detected at high concentrations in up to four percent of untreated groundwater used for public water supply in the coastal region of Los Angeles and Orange Counties.

USGS
September 10, 2012

MENLO PARK, Calif. — The California Geological Survey is giving away free maps in preparation for the move of their Maps and Publications Sales office at the end of the month. Spurred by a U.S. Geological Survey initiative to reduce rent costs and the total amount of federal space occupied, CGS will move their map store to the second floor of the same building they currently occupy.

A group of men and women stand together smiling for the camera and wearing bicycling gear.
August 31, 2012

“Team MarFac” from the Marine Facility at the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California, completed the Strawberry Fields Forever Bike Ride.

USGS
August 29, 2012

SAN DIEGO, Calif. — Benzene occurs infrequently in California public supply wells and comes predominantly from naturally occurring petroleum deposits deep in the ground, according to a study by the U.S. Geological Survey. Spills associated with underground fuel storage and above ground distribution systems have long been considered the main source of benzene in groundwater.

USGS
August 27, 2012

SACRAMENTO, Calif. — The U.S. Geological Survey has released updated flood frequency estimates for select rural "natural flow" California streams throughout the state. The estimates are based on greatly expanded data and documented in three reports available online. These reports from the USGS and its partners represent an important resource for emergency officials, water

Salton Sea sunset
August 27, 2012

An energetic earthquake swarm (largest event magnitude 5.5) is ongoing in the Brawley Seismic Zone south of the Salton Sea in Southern California.

USGS
August 21, 2012

SANTA CRUZ, Calif. — The southern sea otter population continues its pattern of tepid recovery, according to the latest population survey led by U.S. Geological Survey, California Department of Fish and Game Office of Spill Prevention and Response and Monterey Bay Aquarium scientists. 

USGS
August 16, 2012

MENLO PARK, Calif. — Residents should not be alarmed to witness a low-flying airplane over the northern Sacramento Valley and surrounding hills starting around August 17. 

USGS
August 15, 2012

MENLO PARK, Calif. —The U.S. Geological Survey is reducing its footprint in Menlo Park to lower rent costs. The move is part of a larger consolidation plan motivated by the Presidential directive to reduce government space utilization. There is not a plan to reduce staff, and the USGS will continue to maintain all operations currently housed in Menlo Park.

Taking GPS coordinates at the Amargosa Desert Research Site
July 24, 2012

Summer is the time when most CalVO scientists get out into the field to conduct geologic and ground-based monitoring investigations of our regional volcanoes.

USGS
July 23, 2012

Dr. Joseph Colgan, a research geologist 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.