Unified Interior Regions

California

States L2 Landing Page Tabs

Filter Total Items: 362
Aerial view of coastal bluffs, marine terrace with farmland, beach in distance with lagoon, highway runs along coast.
Date Published: July 15, 2019
Status: Active

Dynamic coastlines along the western U.S.

The west coast of the United States is extremely complex and changeable because of tectonic activity, mountain building, and land subsidence. These active environments pose a major challenge for accurately assessing climate change impacts, since models were historically developed for more passive sandy coasts.

Image shows methane bubbling up from the seafloor
Date Published: July 15, 2019
Status: Active

EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS is a multi-year, multi-institution cooperative research campaign in deep sea areas of California, Oregon, and Washington, including the continental shelf and slope. EXPRESS data and information are intended to guide wise use of living marine resources and habitats, inform ocean energy and mineral resource decisions, and improve offshore hazard assessments.

USGS
Date Published: July 11, 2019
Status: Completed

Comparing Shaking Intensity from Two Bay Area Earthquakes

The 1989 Loma Prieta earthquake caused billions of dollars in damage and claimed more than sixty lives. But was it "the big one"? Take a look at the comparison between the images below for the 1989 Loma Prieta and the 1906 San Francisco earthquakes, and decide for yourself.

The colors on the map indicate Modified Mercalli Shaking Intensity (MMI) at each point, which is usually (but not...

History of the Southern Hayward fault
Date Published: June 28, 2019
Status: Completed

Paleoseismology and the Hayward Fault

A large, widely damaging earthquake will occur on the Hayward fault in the future. That much we know.
What we don't know is when.

USGS
Date Published: June 26, 2019
Status: Active

Information by Region- California

  

An enormous rock in the ocean viewed from above, with the coast behind and sunlight on the water.
Date Published: June 20, 2019
Status: Active

Aerial Seabird and Marine Mammal Surveys

The Seabird Studies Team at the USGS Western Ecological Research Center is conducting aerial photographic surveys of the ocean off central and southern California to create comprehensive maps of seabird and marine mammal distributions. The project is supported by the Bureau of Ocean Energy Management and will inform planning in advance of potential offshore wind energy development along the...

Colored shaded-relief bathymetry map of Monterey Canyon and Vicinity, California
Date Published: June 17, 2019
Status: Active

California Seafloor and Coastal Mapping Program

A Foundation for Characterizing Hazards, Monitoring Change, and Managing Resources

Map shows a coastal city with an airport and how, during a large storm, ocean water would flood around city features.
Date Published: June 17, 2019
Status: Active

The Coastal Storm Modeling System

The Coastal Storm Modeling System (CoSMoS) provides emergency responders and coastal planners with critical storm-hazard information such as flood extent, flood depth, duration of flooding, wave height, and currents that can be used to increase public safety, mitigate physical damages, and more effectively manage complex coastal settings....

Satellite image of a large bay, the surrounding land, and the rivers that feed the bay.
Date Published: June 17, 2019
Status: Active

Ecosystem Restoration in San Francisco Bay and Delta

In many systems, particularly the relatively dry western United States, freshwater that historically flowed into estuaries has been diverted for drinking water, agriculture, and industry. The resulting changes to water flow profoundly altered estuarine ecosystems. CMHRP studies in this complex system...

faults in Southern California
Date Published: June 17, 2019
Status: Active

Salton Seismic Imaging

Studying Earthquake Hazards and Rifting Processes in the Imperial and Coachella Valleys

location of portable arrays of seismometers
Date Published: June 17, 2019
Status: Active

San Francisco Bay Area Arrays and the East Bay Seismic Experiment

Portable Seismograph Deployments to Research the Effects of Basins, Topography, and Fault Zones on Seismic Waves.

The implosion of the Warren Hall building on California State University East Bay (CSU-EB) campus in August of 2013 provided an excellent opportunity to use a “free” seismic source that was practically located on the Hayward Fault.

WERC High Sierra's
Date Published: June 13, 2019
Status: Active

Improving Forecasting for California's Snow Melt Water Supply

California's Sierra Nevada snowpack accounts for much of the water supply in many parts of the state. The snowpack retains large amounts of water in the winter that is then released as temperatures rise in the spring and summer. The snowpack also keeps the Sierra soil moist by covering it longer into spring and summer. Soil moisture influences the onset of wildfires, as well as wildfire...

Filter Total Items: 372
Graphic illustrating location of Land Change Monitoring, Assessment, and Projection sample data
March 28, 2019

USGS LCMAP is the foundation for an integrated land change science framework. This new generation of land change and land cover data are provided to the science community as a suite of products. The products are developed from 30-m Landsat TM, ETM+, and OLI for the years 1985 to 2017. The provisional product suite includes five land cover products and five spectral change products.

Mpa shows areas along the California coast where coastal storm modeling system implementations are completed
March 26, 2019

CoSMoS makes detailed predictions over large geographic scales of storm-induced coastal flooding and erosion for both current and future SLR scenarios, as well as long-term shoreline change and cliff retreat. Several versions of CoSMoS have been implemented for areas of the California coast, including Southern California, Central California, and San Francisco Bay.

3D flyover view of Mud Creek slide
March 18, 2019

This data release contains structure-from-motion (SfM) point-cloud data from aerial surveys conducted over the Mud Creek landslide on Big Sur from 1967-2018. Data sources include scanned aerial photographs, digital images collected from fixed-wing aircraft, and digital images collected from multirotor UAS.

Map of the Yucaipa Valley area displaying groundwater wells used to monitor water quality and groundwater basin boundaries as de
February 21, 2019

This site provides hydrologic data collected or compiled by the USGS in the Yucaipa area; some additional data may be available from the USGS database National Water Information System (NWIS).

screenshot of interactive data map displaying  USGS wells in the San Antonio Creek groundwater basin
February 13, 2019

In order to understand the integrated hydrologic systems, many different types of data are being gathered from both the surface water and groundwater system. Learn about these data types and explore them with the interactive map.

USGS
February 11, 2019

This data release presents raw (.csv) and processed (.csv) data files from land-based, frequency-domain electromagnetic induction (EMI) data collected at Bicycle Basin, U.S. Army Fort Irwin National Training Center, California. Data were collected during three distinct time periods: March 19, 2008 (1 survey), December 1 to December 5, 2014 (46 surveys) and Dece

Tubes used for collecting groundwater samples protruding from a nested groundwater well
February 1, 2019

Table of groundwater well sites in the Borrego Valley that were sampled for groundwater quality and groundwater level measurements.  Provides links to data as well as archvied well documents.

Screenshot of the Borrego Valley groundwater quality data map
January 31, 2019

The quality of groundwater in the Borrego Valley is a concern because it is the sole source of water for agricultural, recreational, and public supply. Explore the interactive water-quality data map for detailed information and to download data.

USGS
January 1, 2019

This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) 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 erosion for both current and future sea-level rise (SLR) scenarios. Projecti

USGS
January 1, 2019

This part of DS 781 presents data for the faults of the Punta Gorda to Point Arena, California, region. The vector data file is included in the "Faults_PuntaGordaToPointArena.zip," which is accessible from https://doi.org/10.5066/P9PNNI9H.
Faults in the Punta Gorda and Point Arena region are identified on seismic-reflection data based on abrupt truncation or warping of refle

USGS
January 1, 2019

This data contains maximum model-derived ocean currents (in meters per second) for the sea-level rise (SLR) 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 erosion for both current and future sea-level rise (SLR) scen

Filter Total Items: 321
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Year Published: 2018

Identifying physics‐based thresholds for rainfall‐induced landsliding

Most regional landslide warning systems utilize empirically derived rainfall thresholds that are difficult to improve without recalibration to additional landslide events. To address this limitation, we explored the use of synthetic rainfall to generate thousands of possible storm patterns and coupled them with a physics‐based hydrology and slope...

Thomas, Matthew A.; Mirus, Benjamin B.; Collins, Brian D.
Thomas, M. A., Mirus, B. B., & Collins, B. D. (2018). Identifying physics‐based thresholds for rainfall‐induced landsliding. Geophysical Research Letters. https://doi.org/10.1029/2018GL079662

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Year Published: 2018

A physics-based earthquake simulator replicates seismic hazard statistics across California

Seismic hazard models are important for society, feeding into building codes and hazard mitigation efforts. These models, however, rest on many uncertain assumptions and are difficult to test observationally because of the long recurrence times of large earthquakes. Physics-based earthquake simulators offer a potentially helpful tool, but they...

Shaw, Bruce E.; Milner, Kevin R.; Field, Edward H.; Richards-Dinger, Keith B.; Gilchrist, Jacquelyn J.; Dieterich, James H.; Jordan, Thomas H.
B. E. Shaw, K. R. Milner, E. H. Field, K. Richards-Dinger, J. J. Gilchrist, J. H. Dieterich, T. H. Jordan, A physics-based earthquake simulator replicates seismic hazard statistics across California. Sci. Adv. 4, eaau0688 (2018).

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Year Published: 2018

Survival, travel time, and utilization of Yolo Bypass, California, by outmigrating acoustic-tagged late-fall Chinook salmon

Juvenile Chinook salmon (Oncorhynchus tshawytscha) migrating through California's Sacramento-San Joaquin River Delta toward the Pacific Ocean face numerous challenges to their survival. The Yolo Bypass is a broad floodplain of the Sacramento River that floods in about 70 percent of years in response to large, uncontrolled runoff events. As one of...

Pope, Adam C.; Perry, Russell W.; Hance, Dalton J.; Hansel, Hal C.
Pope, A.C., Perry, R.W., Hance, D.J., and Hansel, H.C., 2018, Survival, travel time, and utilization of Yolo Bypass, California, by outmigrating acoustic-tagged late-fall Chinook salmon: U.S. Geological Survey Open-File Report 2018-1118, 33 p., https://doi.org/10.3133/ofr20181118.

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Year Published: 2018

Controls on submarine canyon head evolution: Monterey Canyon, offshore central California

The Monterey submarine canyon, incised across the continental shelf in Monterey Bay, California, provides a record of the link between onshore tectonism, fluvial transport, and deep-marine deposition. High-resolution seismic-reflection imaging in Monterey Bay reveals an extensive paleocanyon unit buried below the seafloor of the continental shelf...

Maier, Katherine L.; Johnson, Samuel Y.; Hart, Patrick E.
Maier, K.L., Johnson, S.Y., and Hart, P., 2018, Controls on submarine canyon head evolution—Monterey Canyon, offshore central California: Marine Geology, v. 404, p. 24-40.

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Year Published: 2018

Analysis of mean seismic ground motion and its uncertainty based on the UCERF3 geologic slip rate model with uncertainty for California

The Uniform California Earthquake Rupture Forecast v.3 (UCERF3) model (Field et al., 2014) considers epistemic uncertainty in fault‐slip rate via the inclusion of multiple rate models based on geologic and/or geodetic data. However, these slip rates are commonly clustered about their mean value and do not reflect the broader distribution of...

Zeng, Yuehua
Zeng, Y. (2018). Analysis of Mean Seismic Ground Motion and Its Uncertainty Based on the UCERF3 Geologic Slip Rate Model with Uncertainty for California, SRL, doi: 10.1785/0220170114.

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Year Published: 2018

Faunal and stable isotopic analyses of benthic foraminifera from the Southeast Seep on Kimki Ridge offshore southern California, USA

We investigated the benthic foraminiferal faunal and stable carbon and oxygen isotopic composition of a 15-cm push core (NA075-092b) obtained on a Telepresence-Enabled cruise to the Southeast Seep on Kimki Ridge offshore southern California. The seep core was taken at a depth of 973 m in the vicinity of a Beggiatoa bacterial mat and vesicomyid...

McGann, Mary; Conrad, James E.
McGann, M., Conrad, J.E., 2018, Faunal and stable isotopic analyses of benthic foraminifera from the Southeast Seep on Kimki Ridge offshore southern California, USA: Deep Sea Research Part II: Topical Studies in Oceanography, https://doi.org/10.1016/j.dsr2.2018.01.011

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Year Published: 2018

Effects of the proposed California WaterFix North Delta Diversion on survival of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Sacramento-San Joaquin River Delta, northern California

The California Department of Water Resources and Bureau of Reclamation propose new water intake facilities on the Sacramento River in northern California that would convey some of the water for export to areas south of the Sacramento-San Joaquin River Delta (hereinafter referred to as the Delta) through tunnels rather than through the Delta. The...

Perry, Russell W.; Pope, Adam C.
Perry, R.W., and Pope, A.C., 2018, Effects of the proposed California WaterFix North Delta Diversion on survival of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Sacramento-San Joaquin River Delta, northern California: U.S. Geological Survey Open-File Report 2018-1078, 94 p. plus appendixes, https://doi.org/10.3133/ofr20181078.

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Year Published: 2018

Juvenile Lost River and shortnose sucker year class strength, survival, and growth in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California—2016 Monitoring Report

Executive SummaryThe largest populations of federally endangered Lost River (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) exist in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California. Upper Klamath Lake populations are decreasing because adult mortality, which is relatively low, is not being balanced by...

Burdick, Summer M.; Ostberg, Carl O.; Hoy, Marshal S.
Burdick, S.M., Ostberg, C.O., and Hoy, M.S., 2018, Juvenile Lost River and shortnose sucker year class strength, survival, and growth in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California—2016 Monitoring Report: U.S. Geological Survey Open-File Report 2018–1066, 43 p., https://doi.org/10.3133/ofr20181066.

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Year Published: 2018

Effects of the proposed California WaterFix North Delta Diversion on flow reversals and entrainment of juvenile Chinook salmon (Oncorhynchus tshawytscha) into Georgiana Slough and the Delta Cross Channel, northern California

The California Department of Water Resources and Bureau of Reclamation propose new water intake facilities on the Sacramento River in northern California that would convey some of the water for export to areas south of the Sacramento-San Joaquin River Delta (hereinafter referred to as the Delta) through tunnels rather than through the Delta. The...

Perry, Russell W.; Romine, Jason G.; Pope, Adam C.; Evans, Scott D.
Perry, R.W., Romine, J.G., Pope, A.C., and Evans, S.D., 2018, Effects of the proposed California WaterFix North Delta Diversion on flow reversals and entrainment of juvenile Chinook salmon (Oncorhynchus tshawytscha) into Georgiana Slough and the Delta Cross Channel, northern California: U.S. Geological Survey Open File Report 2018-1028, 46 p., https://doi.org/10.3133/ofr20181028.

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Year Published: 2018

Clayey landslide initiation and acceleration strongly modulated by soil swelling

Largely unknown mechanisms restrain motion of clay-rich, slow-moving landslides that are widespread worldwide and rarely accelerate catastrophically. We studied a clayey, slow-moving landslide typical of thousands in northern California, USA, to decipher hydrologic-mechanical interactions that modulate landslide dynamics. Similar to some other...

Schulz, William; Smith, Joel B.; Wang, Gonghui; Jiang, Yao; Roering, Joshua J.

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Year Published: 2018

Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria

Rainfall-induced shallow landsliding is a persistent hazard to human life and property. Despite the observed connection between infiltration through the unsaturated zone and shallow landslide initiation, there is considerable uncertainty in how estimates of unsaturated soil-water retention properties affect slope stability assessment. This source...

Thomas, Matthew A.; Mirus, Benjamin B.; Collins, Brian D.; Lu, Ning; Godt, Jonathan W.
Thomas MA, Mirus BB, Collins BD, Lu N, and Godt JW (2018) Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria, Landslides. https://doi.org/10.1007/s10346-018-0950-z

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Year Published: 2018

Earthquake potential in California-Nevada implied by correlation of strain rate and seismicity

Rock mechanics studies and dynamic earthquake simulations show that patterns of seismicity evolve with time through (1) accumulation phase, (2) localization phase, and (3) rupture phase. We observe a similar pattern of changes in seismicity during the past century across California and Nevada. To quantify these changes, we correlate GPS strain...

Zeng, Yuehua; Petersen, Mark D.; Shen, Zheng-Kang
Zeng, Y., Petersen, M. D., & Shen, Z.-K.(2018). Earthquake potential in California-Nevada implied by correlation of strain rate and seismicity. Geophysical Research Letters, 45. https://doi.org/10.1002/2017GL075967

Filter Total Items: 1,163
TOC-L Laboratory Total Organic Carbon Analyzer
September 5, 2019

TOC-L Laboratory Total Organic Carbon Analyzer

TOC-L Laboratory Total Organic Carbon Analyzer

Labconco WaterPros PS ultrapure water filtration system in Biology Lab
September 3, 2019

Labconco WaterPros PS ultrapure water filtration system in Biology Lab

Labconco WaterPros PS ultrapure water filtration system in Biology Lab

Fume Hood in Carbon Lab used for acid storage and acid cleaning of laboratory dishware
September 1, 2019

Fume Hood in Carbon Lab used for acid storage and acid cleaning of lab

Fume Hood in Carbon Lab used for acid storage and acid cleaning of laboratory dishware

Fume Hood in Carbon Lab
August 31, 2019

Fume Hood in Carbon Lab

Horiba Aqaulog - simultaneously measures absorbance spectra and fluorescence Excitation-Emission Matrices

August 29, 2019

PubTalk 08/2019 — Pliocene World

Title: Pliocene World: Earth's Climate 3 Million Years Ago and How it Relates to our Future
By Marci Robinson, USGS Research Geologist 

  • Three million years ago, during the late Pliocene, CO2 levels were similar to today, but global temperatures and sea level were much higher
  • Find out how we use microfossils to reconstruct
person on large metal tower
August 28, 2019

Scott Lydeen on Strawberry Peak Seismic Station Tower

USGS technicial Scott Lydeen climbing the tower at the Strawberry Peak seismic station tower, part of the Southern California Seismic Network.

August 23, 2019

Animation of a Scenario M6.9 Earthquake on the Rose Canyon Fault

This video presents an animation of computer-simulated ground motions that might occur for a magnitude 6.9 earthquake rupturing the Rose Canyon fault in southern California. The scenario earthquake ruptures a 65-km-long section of the Rose Canyon fault that lies just offshore of San Diego, California, and Tijuana, Mexico. In this scenario, the rupture starts near the

August 1, 2019

Image of the Week - A Tear in the Mojave

Satellite imagery shows the rupture and shifting of land near Ridgecrest, CA from the July 2019 earthquakes.
 

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Flooding in California
March 13, 2019

New U.S. Geological Survey-led coastal modeling research presents state, federal, and commercial entities with varying storm and sea level-rise scenarios to assist with planning for future infrastructure and mitigation needs along the California coast. 

View of the Mono Lake-Long Valley volcanic region
March 7, 2019

The Mono Craters, a line of volcanic domes and craters south of Mono Lake in eastern California, represent the youngest rhyolitic volcanoes in the western United States.

Application window with parameter settings down the left, map showing results of parameter settings, and legend on right.
March 1, 2019

Oceanographer Juliette Finzi Hart of the USGS Pacific Coastal and Marine Science Center was invited by the California Department of Transportation (Caltrans) to provide an overview of the USGS Coastal Storm Modeling System (CoSMoS) at the 2019 California Transportation Planning Conference in San Diego.

Three illustrations to show location of a study site, each labeled with distinctive areas, where there are high coastal cliffs.
March 1, 2019

On Monday, February 25, 2019, research geologist Jonathan Warrick of the USGS Pacific Coastal and Marine Science Center spoke with ABC7 News about a February 22 landslide that injured one woman and buried another at San Francisco’s Fort Funston beach.

Infographic about the 2019 report "California's Exposure to Volcanic Hazards"
February 25, 2019

The potential for damaging earthquakes, landslides, floods, tsunamis, and wildfires is widely recognized in California.

USGS
February 14, 2019

Great Lakes Phragmites programs served as a case study for the Delta Stewardship Council

USGS Director Jim Reilly being given a tour of the CalVO Ops room by Emily Montgomery-Brown
February 7, 2019

During a tour of western USGS offices, Director James F. Reilly II visited the CalVO offices and operations center in Menlo Park, CA.

A picture of a river in the neonicotionoid insecticide study
January 14, 2019

This month California Water Science Center Scientist Dr. Michelle Hladik and others published an article on water treatment processes and their effects on neonicotinoid pesticides and the potential health threats they pose.

Underwater photo of a rocky outcrop with many multicolored corals growing on it.
November 29, 2018

Researchers from the USGS Pacific Coastal and Marine Science Center (PCMSC) participated in a research cruise to survey deep-water coral, sponge, and fish habitats off U.S. West Coast.

A low-flying helicopter towing a geophysical device collects scientific data for salinity and aquifer mapping.
November 20, 2018

A low-flying helicopter under contract to the U.S. Geological Survey, in cooperation with the California State Water Resources Control Board, has begun collecting and recording geophysical measurements for purpose of groundwater salinity and aquifer mapping.

A man crouches next to an instrument as he prepares and secures it on board a ship.
November 1, 2018

Turbidity currents have historically been described as fast-moving currents that sweep down submarine canyons, carrying sand and mud into the deep sea. But a new paper in Nature Communications shows that, rather than just consisting of sediment-laden seawater flowing over the seafloor, turbidity currents also involve large-scale movements of the seafloor itself.

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