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: 389
Date published: January 1, 2004
Status: Completed

Big Sur Coastal Landslides

Information about USGS Pacific Coastal and Marine Science Center studies on coastal landslides in the Big Sur area

Date published: January 1, 2004
Status: Completed

Oceanography Beyond the Golden Gate

Information about the USGS Pacific Coastal and Marine Science Center's oceanographic studies offshore of San Francisco Bay, from 1989-2003.

Date published: November 15, 2001
Status: Archived

SAGEMAP

A GIS Database for Sage-grouse and Shrubsteppe Management in the Intermountain West

Contacts: Steve Hanser
Date published: October 1, 2001
Status: Completed

Water-Quality Sampling at Five Hydrologic Benchmark Stations in the Western United States

The Hydrologic Benchmark Network (HBN) was established in 1963 to provide  Swiftwater Creek, MT long-term measurements of streamflow and water quality in areas of the United States that are minimally affected by human activities. Historically, the HBN has used a fixed-interval sampling strategy, however other more robust sampling strategies are now available. Trend networks, for example, can...

Date published: January 1, 1999
Status: Completed

Mapping Shipping Hazards in San Francisco Bay

Information about the 1997-1998 study by USGS Pacific Coastal and Marine Science Center, to map the floor of San Francisco Bay in order to reveal the bay's shipping hazards.

Contacts: Peter Dartnell
Filter Total Items: 517
Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC14 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

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 flood-hazard depth and duration projections: 100-year storm in Orange 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

Date published: January 1, 2017

Seafloor character--Offshore of Gaviota Map Area, California

This part of DS 781 presents data for the Seafloor character map of the Offshore of Gaviota map area, California. The vector data file is included in "SeafloorCharacter_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 wave-hazard projections: 1-year storm in Santa Barbara 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 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

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: 20-year storm in Orange 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 wave-hazard projections: 100-year storm in Los Angeles County

Projected Hazard: Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
Model Summary: 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 %2

Date published: January 1, 2017

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

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

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

To support Coastal Storm Modeling System (CoSMoS) in the San Francisco Bay (v2.1), 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 (GCMs) provide useful projections of near-surface wind vectors into the 21st century, resolution is not sufficient enoug

Date published: January 1, 2017

Water pressure/depth and turbidity time-series data from CHC16 Marsh and mudflat 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: 20-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: 984
USGS hydrologic technician stands in waist-high waters of a flooded Santa Maria River while taking streamflow measurements
March 1, 2017

Santa Maria River Flooding

A USGS hydrologic technician takes streamflow measurements during flooding of the Sisquoc River, a tributary of the Santa Maria River, near the town of Garey in Santa Barbara County. 

Photo of shoreline with very little sandy beach. Heavy equipment is  piling up large boulders (rip rap) along the eroded shore
February 28, 2017

Armoring the shore at Goleta Beach

Installing large boulders as rip rap to armor the shore against further erosion at Goleta Beach in Southern California. The tide is very low (negative).

photo of bare rocks exposed below cliffs at low tide along a shoreline.
February 28, 2017

Exposed bedrock at low tide

Exposed bedrock on the beach, below the University of California, Santa Barbara.

row of palm trees along a low cliff behind a narrow beach with very little sand
February 28, 2017

Beach loss and armoring at Goleta Beach

Beach loss and armoring at Goleta Beach, very low (negative) tide

long stretch of beach, with row of houses teetering on the edge of the cliff above beach. Bare rocks exposed & no sand on beach
February 28, 2017

Exposed bedrock at Isla Vista beach

Bedrock exposed at low tide along the beach at Isla Vista, California

house perched at the top of cliff edge above beach.
February 28, 2017

Exposed bedrock at Isla Vista

Exposed bedrock on the beach during very low (negative) tide at Isla Vista, California

Map showing depth of a very intricate bay and delta system color-coded to enhance central bay channels and tidal channels.
February 27, 2017

San Francisco Bay and Delta DEM

High-resolution (10-meter per pixel) digital elevation model (DEM) of the Sacramento-San Joaquin Delta, using both bathymetry and topography data relative to current modern datum of North American Vertical Datum of 1988 (NAVD88). This DEM is the result of collaborative efforts of the U.S. Geological Survey (USGS) and the California Department of Water Resources (DWR).

two men standing in a boat tied up to a dock
January 31, 2017

Readying a sonar-equipped boat for mapping

USGS scientists readying a sonar-equipped boat to map the ocean bottom near Santa Cruz, Calif.

person standing up riding a personal watercraft across small ocean swells, with buildings and a long pier in the background
January 31, 2017

Sonar-equipped personal watercraft mapping bathymetry.

A sonar-equipped personal watercraft mapping the bathymetry underwater near Santa Cruz, Calif.

man walking along wet sand on beach wearing a backpack with an antenna sticking pout of it
January 31, 2017

Mapping the beach with a GPS-equipped backpack unit.

USGS scientist Daniel Hoover mapping the beach at Santa Cruz with a GPS-equipped backpack unit.

two young men standing on a pier with a large tripod, looking down at camera, and holding equipment.
January 31, 2017

Setting up a lidar scanner to map the beach.

 USGS scientists setting up a lidar scanner on the pier to map the beach near Capitola, California.

January 31, 2017

Hatching an Engineer

What does it take to become an ocean engineer? Here is the path that USGS Gerry Hatcher took.
 

Filter Total Items: 934
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.

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.