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

Backscatter [USGS08]--Offshore of Gaviota Map Area, California

This part of DS 781 presents 2-m-resolution data collected by the U.S. Geological Survey in 2008 for the acoustic-backscatter map of the Offshore of Gaviota Map Area, California. The GeoTiff is included in "Backscatter_[USGS08]_OffshoreGaviota.zip," which is accessible from https://doi.org/10.5066/F7TH8JWJ. These data accompany the pamphlet and...

Date published: January 1, 2017

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

Bathymetry--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 GeoTiff is included in "Bathymetry_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., Hartwell...

Date published: January 1, 2017

Water pressure/depth, velocity, and turbidity time-series data from CHC14 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 depth and duration projections: 100-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

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 wave-hazard projections: 100-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 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

Geology and geomorphology--Offshore of Gaviota Map Area, California

This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Gaviota map area, California. The vector data file is included in "Geology_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 depth and duration projections: average conditions 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

Date published: January 1, 2017

Folds--Offshore of Point Conception Map Area, California

This part of DS 781 presents fold data for the geologic and geomorphic map of the Offshore of Point Conception Map Area, California. The vector data file is included in "Folds_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
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Year Published: 1992

The Loma Prieta, California, Earthquake of October 17, 1989: Strong ground motion and ground failure

Professional Paper 1551 describes the effects at the land surface caused by the Loma Prieta earthquake. These effects: include the pattern and characteristics of strong ground shaking, liquefaction of both floodplain deposits along the Pajaro and Salinas Rivers in the Monterey Bay region and sandy artificial fills along the margins of San...

Coordinated by Holzer, Thomas L.
The Loma Prieta, California, Earthquake of October 17, 1989: Strong Ground Motion and Ground Failure; 1992; PP; 1551; Coordinated by Holzer, Thomas L.

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Year Published: 1991

The Loma Prieta earthquake, ground motion, and damage in Oakland, Treasure Island, and San Francisco

The basis of this study is the acceleration, velocity, and displacement wave-forms of the Loma Prieta earthquake (18 October 1989; M = 7.0) at two rock sites in San Francisco, a rock site on Yerba Buena Island, an artificial-fill site on Treasure Island, and three sites in Oakland underlain by thick sections of poorly consolidated Pleistocene...

Hanks, Thomas C.; Brady, A. Gerald

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Year Published: 1990

Ascension-Monterey Canyon system: history and development

No abstract available.

Greene, H. Gary; Hicks, Karen R.
Ascension-Monterey Canyon system: history and development; 1990; Book chapter; Book; Geology and tectonics of the central California coastal region; Greene, H. Gary; Hicks, Karen R.

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Year Published: 1990

National water summary 1987: Hydrologic events and water supply and use

Water use in the United States, as measured by freshwater withdrawals in 1985, averaged 338,000 Mgal/d (million gallons per day), which is enough water to cover the 48 conterminous States to a depth of about 2.4 inches. Only 92,300 Mgal/d, or 27.3 percent of the water withdrawn, was consumptive use and thus lost to immediate further use; the...

Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.
National water summary 1987: hydrologic events and water supply and use; 1990; WSP; 2350; Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.

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Year Published: 1990

A water-resources data-network evaluation for Monterey County, California; Phase 3, Northern Salinas River drainage basin

This report evaluates existing data collection networks and possible additional data collection to monitor quantity and quality of precipitation, surface water, and groundwater in the northern Salinas River drainage basin, California. Of the 34 precipitation stations identified, 20 were active and are concentrated in the northwestern part of the...

Templin, W.E.; Schluter, R.C.
Attribution: Water Resources
A water-resources data-network evaluation for Monterey County, California; Phase 3, Northern Salinas River drainage basin; 1990; WRI; 89-4123; Templin, W. E.; Schluter, R. C.

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Year Published: 1990

Estimates of consumptive use and ground-water return flow and the effect of rising and sustained high river stage on the method of estimation in Cibola Valley, Arizona and California, 1983 and 1984

In Cibola Valley, Arizona, water is pumped from the Colorado River to irrigate crops and to maintain wildlife habitat. Unused water percolates to the water table and, as groundwater, moves downgradient into areas of phreatophytes, into a drainage ditch, out of the flood plain, and back to the river. In 1983 and 1984, groundwater return flow was...

Owen-Joyce, Sandra J.
Estimates of consumptive use and ground-water return flow and the effect of rising and sustained high river stage on the method of estimation in Cibola Valley, Arizona and California, 1983 and 1984; 1990; WRI; 89-4194; Owen-Joyce, Sandra J.

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Year Published: 1990

The San Andreas Fault System, California

Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major...

Wallace, Robert E.
The San Andreas Fault System, California; 1990; PP; 1515; Edited by Wallace, Robert E.

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Year Published: 1989

Observations in Monterey Canyon and Fan Valley using the submersible Alvin and a photographic sled

Eittreim, Stephen L.; Embley, R.W.; Normark, W.R.; Greene, H. Gary; McHugh, C.M.; Ryan, W.B.
Observations in Monterey Canyon and Fan Valley using the submersible Alvin and a photographic sled; 1989; OFR; 89-291; Eittreim, Stephen L.; Embley, R. W.; Normark, W. R.; Greene, H. G.; McHugh, C. M.; Ryan, W. B.

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Year Published: 1988

Estimates of consumptive use and ground-water return flow using water budgets in Parker Valley, Arizona and California, 1981-84

Annual water budgets were used to estimate consumptive use by vegetation and groundwater return flow in Parker Valley, Arizona and California. Consumptive use by vegetation was estimated to be 482,800 acre-ft in 1981, 432,000 acre-ft in 1982, 413,500 acre-ft in 1983, and 420,900 acre-ft in 1984 on the Arizona side of the Colorado River, and 45,400...

Owen-Joyce, Sandra J.
Estimates of consumptive use and ground-water return flow using water budgets in Parker Valley, Arizona and California, 1981-84; 1988; WRI; 88-4063; Owen-Joyce, Sandra J.

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Year Published: 1988

Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California

A catastrophic rainstorm in central California on January 3-5,1982, dropped as much as half the mean annual precipitation within a period of about 32 hours, triggering landslides and floods throughout 10 counties in the vicinity of the San Francisco Bay. More than 18,000 of the slides induced by the storm transformed into debris flows that swept...

Ellen, Stephen D.; Wieczorek, Gerald F.
Landslides, Floods, and Marine Effects of the Storm of January 3-5, 1982, in the San Francisco Bay Region, California; 1988; PP; 1434; Edited by Ellen, Stephen D.; Wieczorek, Gerald F.

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Year Published: 1988

Multichannel seismic-reflection profiles collected in 1979, between latitudes 34 degrees 15' and 36 degrees 30' north, off the California coast from Pt. Conception to Point Sur

McCulloch, D.S.; Mann, D. M.; Sliter, R.; McClellan, P.H.
Multichannel seismic-reflection profiles collected in 1979, between latitudes 34 degrees 15' and 36 degrees 30' north, off the California coast from Pt. Conception to Point Sur; 1988; OFR; 88-224; McCulloch, D. S.; Mann, D. M.; Sliter, R.; McClellan, P. H.

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Year Published: 1988

Preliminary paleolimnologic data for the Walker Lake subbasin, California and Nevada

Benson, Larry V.
Preliminary paleolimnologic data for the Walker Lake subbasin, California and Nevada; 1988; WRI; 87-4258; Benson, Larry V.

Filter Total Items: 1,120
Two same-size items: Pack of playing cards (top) and circuit board with fan and electronic components (bottom).
July 18, 2017

Small computer that controls video cameras above beach in Santa Cruz

The small computer, or “micro-controller,” at the bottom of this photo controls the operation of two video cameras mounted on the 10-story Dream Inn hotel in Santa Cruz, California. The cameras take 10-minute videos of Santa Cruz Main Beach and Cowells Beach every half hour during daylight hours (view the most recent images).

...
Ashy storm-petrel (Oceanodroma homochroa) with metal identification band being held by a USGS researcher
July 14, 2017

Ashy Storm-Petrel Call

This is the call of the elusive Ashy Storm-Petrel (Oceanodroma homochroa). Ashy Storm-Petrels nest in burrows and crevices on offshore rocks and islands. To avoid predators, they only arrive and depart their island nests under the cover of darkness. That makes studying them pretty difficult. But scientists have come up with a clever solution: they set up acoustic recorders

Photograph of California coastal Highway 1 looking north toward Big Sur.
July 12, 2017

Big Sur Coast

Near San Simeon, view looks north up Highway 1 along the California coast toward Big Sur.

Two photographs taken from the sky looking down on a landslide into the ocean water with a plume of murky water along the coast.
July 12, 2017

Drone’s-eye views of the toe of the Mud Creek landslide

Drone’s-eye views of the toe of the Mud Creek landslide, from videos shot by Shawn Harrison on July 12, 2017

Photo of child and USGS employee studying an egg.
July 11, 2017

Child Looking at Egg

Taken 7/11/2017 in Suisun City. The California Waterfowl Association hosts a "Youth Hunter Camp" for children at the Grizzly Ranch in Suisun City, CA. Here, a USGS employee and a child look through a tube at an egg to observe its contents.

Photo of USGS employee teaching children how to monitor vegetation density and height for waterfowl studies.
July 11, 2017

WERC Measuring Vegetation around Waterfowl Nests

Taken 7/11/2017 in Suisun City, CA. A USGS employee teaches children at the California Waterfowl Association's "Youth Hunter Camp" to measure the vegetation surrounding waterfowl nests.

Photo of USGS employee building a decoy waterfowl nest for outreach demonstration.
July 11, 2017

WERC Scientist Building Decoy Waterfowl Nest

Taken 7/11/2017 at Grizzly Ranch, Suisun City, CA. USGS biological science technician Breanne Cooney builds a decoy waterfowl nest for an outreach demonstration. 

USGS employee building a decoy waterfowl nest for outreach demonstration.
July 11, 2017

WERC Scientist Building Decoy Waterfowl Nest 2

Taken 7/11/2017 at Grizzly Ranch, Suisun City, CA. USGS biological science technician Breanne Cooney builds a decoy waterfowl nest for an outreach demonstration.

USGS employee showing kids how to measure vegetation around waterfowl nests.
July 11, 2017

Kids Learning to Measure Vegetation with WERC Scientist

Taken 7/11/2017 at Grizzly Ranch, Suisun City, CA. USGS biological science technician Breanne Cooney shows kids how to measure the vegetation surrounding waterfowl nests. Density and height of vegetation can influence the survival of waterfowl eggs and chicks and affect their risk of falling prey to ravens, skunks, and other predators.

Preliminary seafloor bathymetry (in rainbow colors) collected by the USGS research vessel Parke Snavely on July 11, 2017
July 11, 2017

Preliminary seafloor bathymetry collected by the USGS on July 11, 2017

Preliminary seafloor bathymetry (in rainbow colors) collected by the USGS research vessel Parke Snavely on July 11, 2017. Relative depths shown in color, superimposed on a shaded-relief map from the June 26 USGS air-photo survey. Note white data gap next to the shore where water was too shallow for the Snavely to map. Shawn Harrison hopes

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Aerial photograph looking from an airplane down on the Big Sur Landslide in California.
July 7, 2017

Big Sur Landslide, July 7, 2017

USGS scientists continue to monitor the slide by collecting imagery every couple of weeks, weather permitting. Pilot Bob Van Wagenen, contracted through the Department of the Interior’s Office of Aviation Services, takes air photos for Jon Warrick’s Big Sur Landslide team, flying out of the Watsonville Municipal Airport in a Cessna 182R. He uses a camera-plus-GPS system

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USGS Scientist sampling soil gasses from a grassy hilltop on Santa Rosa Island, CA, with fog draping coast in background.
July 6, 2017

Sampling soil carbon dioxide on Santa Rosa Island

USGS Scientist sampling soil gasses from a grassy hilltop soil on Santa Rosa Island, Channel Islands National Park, California. The composition of soil gasses is indicative of the number and variety of microorganisms in the soil and what type of material they are digesting. Santa Rosa Island was heavily impacted by grazing animals and learning about soil microorganisms

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Filter Total Items: 980
USGS
June 26, 2012

Tools, Resources for Earthquake Readiness and Emergency Management To Be Shared, Explained by U.S. Geological Survey Scientists at Conference at Caltech
 

USGS
June 26, 2012

MENLO PARK, Calif. —Throughout the United States, June is recognized as National Oceans Month.  This Thursday, the U.S. Geological Survey invites the public to a lecture entitled "Scanning the Seafloor with Sound." 

USGS
June 5, 2012

California, Louisiana and Mississippi join the more than 40 states covered by the US Topo
 

USGS
May 30, 2012

MENLO PARK, Calif. —May is American Wetlands Month. Hear how U.S. Geological Survey scientists are supporting the ongoing restoration efforts to improve South Bay wetlands for endangered species and migratory birds, as well as conducting studies to better understand this wetland ecosystem, and how adaptive management practices will be working over the coming decades to restore...

USGS
May 29, 2012

MENLO PARK, Calif. – 100 years ago, in June 1912, the largest volcanic eruption of the 20th century took place in what is now Alaska's Katmai National Park and Preserve. U.S. Geological Survey geologist Judy Fierstein, co-author of a new landmark study on this huge volcanic event, shares her work with the community in a free public lecture Wednesday, June 6, a century to the...

USGS
May 28, 2012

SANTA CRUZ, Calif. — The results of an innovative collaboration that paired artists from California’s central coast and the greater San Francisco Bay Area with scientists from the U.S. Geological Survey’s Pacific Coastal and Marine Science Center, will be on display at the R. Blitzer Gallery in Santa Cruz June 1 through July 7. 

USGS
May 23, 2012

CARNELIAN BAY, Calif. — Results of a new U.S. Geological Survey study conclude that faults west of Lake Tahoe, Calif., referred to as the Tahoe-Sierra frontal fault zone, pose a substantial increase in the seismic hazard assessment for the Lake Tahoe region of California and Nevada, and could potentially generate earthquakes with magnitudes ranging from 6.3 to 6.9. 

USGS
May 22, 2012

SANTA CRUZ, Calif. — The results of an innovative collaboration that paired artists from California's central coast and the greater San Francisco Bay Area with scientists from the U.S. Geological Survey's Pacific Coastal and Marine Science Center, will be on display at the R. Blitzer Gallery in Santa Cruz during June. 

Lassen Peak viewed from the south at the summit of Brokeoff Volcano...
May 22, 2012

On May 22, 1915 an explosive volcanic eruption occurred at Lassen Peak, California.

USGS
May 18, 2012

MENLO PARK, Calif. – Members of the news media are invited to attend the U.S. Geological Survey Open House in Menlo Park this weekend.  This event includes over 80 exhibits that highlight the work USGS scientists do. Join them in action as they share the excitement of their scientific work and discoveries with the general public. 

USGS
May 16, 2012

PORTLAND, Ore.­– The U.S. Geological Survey has developed models to help water managers identify strategies to use groundwater for meeting competing water demands in the semi-arid upper Klamath Basin. 

USGS
May 9, 2012

MENLO PARK, Calif. – Many Bay Area residents know what it’s like to experience an earthquake, but fewer of them know why earthquakes happen. The concepts behind earthquakes and living safely in earthquake country are as simple as a fishing line hooked to a stack of bricks, explains USGS geophysicist Ross Stein, whose family-friendly seismic demos and models are part of the...