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: 388
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: 514
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

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

Date published: January 1, 2017

CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 wave-hazard projections: 1-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: 100-year storm in Los Angeles County

Projected Hazard: 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.
Model Summary: The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) o

Date published: January 1, 2017

Bathymetry--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 GeoTiff 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.,...

Filter Total Items: 963
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.
 

January 31, 2017

What's Drifting Beneath Kauai's Ocean?

Residents and visitors both revel in Kauai’s lush landscape, and beneath its seascape. However, it’s underwater where things don’t look so healthy. Scientists from the U.S. Geological Survey put together a detailed picture of the physical environment of the coral reefs at Makua Beach. Understanding just what these reefs are exposed to and for how long, may help explain why

USGS scientist standing with a pole annotated with land-surface elevation marks at given years at bench mark H 1235 RESET.
January 31, 2017

Land Subsidence near El Nido, CA

National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys. The exact maximum subsidence location is unknown; however, this bench mark has some of the larger

...
USGS scientist standing with a pole annotated with land-surface elevation marks at given years at bench mark W 990.
January 31, 2017

Land Subsidence near El Nido, CA

National Geodetic Survey vertical control bench mark W990 CADWR in Merced County, California. W 990 CADWR is on the Mariposa Bypass Bridge on Washington Rd. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys. The exact maximum subsidence location is unknown; however, this bench mark has some of

...
Satellite image showing the flooding in California.
January 30, 2017

January Rain, Snow Refills California Reservoirs

A decade of drought in California has eased after the first month of 2017 thanks to heavy rains and snow, a fact that Landsat images are helping to confirm.

January 26, 2017

PubTalk 1/2017 — Unusual sources of tsunamis

A presentation on "Unusual Sources of Tsunamis From Krakatoa to Monterey Bay" by Eric Geist, USGS Research Geophysicist

- Not all tsunamis are generated by earthquakes.
- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances
- Data from tide gauges can help unravel the complex physics of these sources

Videographers:

Attribution: Natural Hazards
Filter Total Items: 929
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. 

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.