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: 412
Date published: November 17, 2020
Status: Active

Multi-Sensor Core Logger Laboratory

The MSCL at the USGS Pacific Coastal and Marine Science Center (PCMSC) in Santa Cruz, California automatically measures P-wave velocity, magnetic susceptibility, electrical resistivity, and gamma density at intervals from 1 millimeter to 1 centimeter along cores up to 1.5 meters long. The device can also automatically line-scan photograph cores that have been split, at a resolution of 10...

Date published: November 17, 2020
Status: Active

Radiochemistry Laboratory

In the radiochemistry lab at the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California, we process samples for natural radioisotope detection to age-date geologic materials. We have two HPGe gamma well detectors, four RADDEC delayed coincidence counters, 16 alpha spec counters, and 10 RAD7 field portable radon 222Rn monitors.

Date published: November 17, 2020
Status: Active

Organic Geochemistry Laboratory

The geochemical laboratory suite at the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California, includes a cold storage room, preparation lab, extraction lab, and instrumentation lab. Analyses in the extraction and instrumentation labs include extraction, identification, and quantification of biomarkers and contaminants of sediments, oils, tars, and other organic rich...

Date published: November 17, 2020
Status: Active

Trace Inorganic Geochemistry Laboratory

In the Pacific Coastal and Marine Science Center’s Trace Inorganic Geochemistry Laboratory in Santa Cruz, California, we have an ultrapurification water system, CEM MarsX, and two Class-100 laminar air flow benches for sediment-geochemical provenance studies and organic matter sourcing.

Date published: November 16, 2020
Status: Active

Using Video Imagery to Study Coastal Change: Sunset State Beach

Two video cameras overlook the coast at Sunset State Beach in Watsonville, California. Camera 1 looks northwest while Camera 2 looks north. The cameras are part of the Remote Sensing Coastal Change project.

Date published: November 12, 2020
Status: Active

Sediment Lab Suite and Carbon Analysis Lab

At our Science Center, we have a suite of laboratories that we affectionately call the "sed lab." The sed lab really consists of 5 labs, arranged next to each other to allow our lab technicians to easily move back and forth between them while processing sediment samples: Sediment Preparation Lab, Fine Particle Analysis Lab, Settling Tubes Lab, Fume Hood Lab, and Carbon Analysis Lab.

Date published: November 10, 2020
Status: Active

Quaternary Hydroclimate Records of Spring Ecosystems

Desert springs and wetlands are among the most biologically productive, diverse, and fragile ecosystems on Earth. They are home to thousands of rare, endemic, and endangered plants and animals and reflect the availability and health of emergent groundwater. Despite the ecological importance of these wetlands, our knowledge of how they might respond to predicted future climate change is limited...

Date published: November 5, 2020
Status: Active

Core X-Ray: 3-D CT Core Imaging Laboratory

The Geotek RXCT, a "rotating x-ray computed tomography" system, creates ultra high-resolution imagery of sediment cores. The system resides at the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California. It requires the operator to take specialized training and hold X-ray radiation and safety certifications.

Date published: November 2, 2020
Status: Active

Selenium Hazard in the Salton Sea Environment, Summary of Current Knowledge to Inform Future Science

The effect of selenium (Se) toxicity on wildlife has been known for more than 50 years. The threat of Se contamination gained greater attention from federal agencies in the 1980s due to the observation of embryo deformity and mortality in birds at a National Wildlife Refuge in California. Harmful effects from Se were determined to be connected to irrigation drainage water.

As a result,...

Date published: October 22, 2020
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.

Read the June 11, 2020...

Date published: October 8, 2020
Status: Active

Using Video Imagery to Study Coastal Change: Santa Cruz Beaches

Two video cameras atop the Dream Inn hotel in Santa Cruz, California, overlook the coast in northern Monterey Bay. One camera looks eastward over Santa Cruz Main Beach and boardwalk, while the other looks southward over Cowells Beach.

Date published: September 28, 2020
Status: Active

Climate impacts on Monterey Bay area beaches

For beach towns around Monterey Bay, preserving the beaches by mitigating coastal erosion is vital. Surveys conducted now and regularly in the future will help scientists understand the short- and long-term impacts of climate change, El Niño years, and sea-level rise on a populated and vulnerable coastline.

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Date published: August 25, 2020

Underwater Videographic Observations of Cultured Delta Smelt in Field Enclosures: Video clips and Summary data

All data is part of a pilot study aimed to observe Delta Smelt behavior within enclosures deployed in the wild. The enclosures used were designed by The California Department of Water Resources and UC Davis as part of their ongoing Delta Smelt enclosure deployment studies. Study 1: This data includes 16 17:43 minute videos of observations of Delta Smelt behavior in a floating field enclosu...

Date published: August 20, 2020

Pesticide constituent data from the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP), August 2013 - May 2018, schedule 2437 constituents

This Data release presents results for pesticide constituents in 460 samples collected from domestic and public-supply wells in August 2013-May 2018 for the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP). The samples were analyzed for 225 pesticide constituents on USGS National Water Quality Laboratory analytical schedule 2437. Results from...

Date published: August 17, 2020

Aerial imagery and structure-from-motion derived data products from UAS survey of the Liberty Island Conservation Bank Wildlands restoration site, Sacramento-San Joaquin Delta, California, October 2018

Unmanned aerial systems were used to acquire high-resolution imagery of the Liberty Island Conservation Bank Wildlands restoration site in the Sacramento–San Joaquin Delta in California, with the goal of using structure-from-motion photogrammetric techniques to derive a digital surface model, orthomosaic imagery, and a topographic point cloud. The survey was conducted using two Department of...

Date published: August 14, 2020

Bay-Delta Regional Monitoring Program | Nutrient Mapping

Data visualization tool created for California's Bay-Delta Regional Monitoring Program.  This web applicaton visualizes nutrients and phytoplankton spatially and temporally.

Date published: August 11, 2020

Projected responses of the coastal water table for California using present-day and future sea-level rise scenarios

Coastal groundwater levels (heads) can increase with sea level rise (SLR) where shallow groundwater floats on underlying seawater. In some areas coastal groundwater could rise almost as much as SLR, but where rising groundwater intersects surface drainage features, the increase will be less. Numerical modeling can provide insight into coastal areas that may be more or less vulnerable to...

Date published: August 11, 2020

Projected groundwater emergence and shoaling for coastal California using present-day and future sea-level rise scenarios

Seamless unconfined groundwater heads for coastal California groundwater systems were modeled with homogeneous, steady-state MODFLOW simulations. The geographic extent examined was limited primarily to low-elevation (i.e. land surface less than approximately 10 m above mean sea level) areas. In areas where coastal elevations increase rapidly (e.g., bluff stretches), the model bounda

Date published: August 11, 2020

Projected water table depths for coastal California using present-day and future sea-level rise scenarios

Seamless unconfined groundwater heads for coastal California groundwater systems were modeled with homogeneous, steady-state MODFLOW simulations. The geographic extent examined was limited primarily to low-elevation (i.e. land surface less than approximately 10 m above mean sea level) areas. In areas where coastal elevations increase rapidly (e.g., bluff stretches), the model bounda

Date published: August 11, 2020

Projected groundwater head for coastal California using present-day and future sea-level rise scenarios

Seamless unconfined groundwater heads for coastal California groundwater systems were modeled with homogeneous, steady-state MODFLOW simulations. The geographic extent examined was limited primarily to low-elevation (i.e. land surface less than approximately 10 m above mean sea level) areas. In areas where coastal elevations increase rapidly (e.g., bluff stretches), the model bounda

Date published: August 7, 2020

Assessing Phytoplankton and Nutrient Abundance in the San Francisco Estuary and Delta

A data visualizatoin exploring the relationship between nutrient distribution and phytoplankton under different conditions across the San Francisco Delta and Estuary. Assessing distribution and abundance aids understanding of how managing nutrient supplies affects aquatic food webs, helping managers evaluate the potential environmental benefits of future nutrient reduction efforts against...

Date published: July 7, 2020

Argon data for Klamath Mountains

This dataset accompanies planned publication '40Ar/39Ar geochronology of hydrothermal activity related to orogenic gold mineralization in the Klamath Mountains, California, U.S.A.'. The Ar/Ar data are for samples that record the mineralization of the area. The geochronology provides time constraints for the mineralization studied in the manuscript. Samples were collected from the Klam

Date published: July 6, 2020

Multichannel minisparker seismic-reflection and chirp sub-bottom data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018

High-resolution multichannel minisparker seismic-reflection and chirp sub-bottom data were collected by the USGS in July of 2018 between Point Conception and Coal Oil Point in the Santa Barbara Channel, California. Data were collected aboard USGS R/V Parke Snavely during field activity 2018-645-FA. Data were acquired to support the USGS geologic hazards projects to aid hazard assessment...

Date published: July 6, 2020

Multichannel minisparker seismic-reflection data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018

High-resolution multichannel minisparker seismic-reflection data were collected by the U.S. Geological Survey in July of 2018 between Point Conception and Coal Oil Point in the Santa Barbara Channel, California. Data were collected aboard the USGS R/V Parke Snavely during field activity 2018-645-FA, using SIG 2-mille minisparker and recorded using an 8-channel Geometrics digital hydrophone

Filter Total Items: 45
screenshot of an interactive map of groundwater data in the Mojave region.  Well sites and water-level contours are displayed.
November 7, 2018

Interactive map of the Mojave and Morongo groundwater basins.  Data layers include sites and data for groundwater levels, water quality, and land subsidence.  Groundwater data spans 1994 to the present.

Map displaying areas in California where the USGS has built groundwater models
August 30, 2018

The USGS models shown on this site are in the public domain, and are freely available. They are based on MODFLOW and other public-domain USGS software. Links to publications and web resources associated with each model are shown in the table next to the model map. The associated model files for some of these models are currently available via download.

Thumbnail image of the cover of USGS Fact Sheet 2016-3020
April 16, 2018

Using information from recent earthquakes, improved mapping of active faults, and a new model for estimating earthquake probabilities, the 2014 Working Group on California Earthquake Probabilities updated the 30-year earthquake forecast for California. They concluded that there is a 72 percent probability (or likelihood) of at least one earthquake of magnitude 6.7 or greater striking somewhere in

 location of and evidence for recent movement on active fault traces within the Hayward Fault Zone, California
April 11, 2018

This map shows the location of and evidence for recent movement on active fault traces within the Hayward Fault Zone, California.

Shake map for At511 Scenario
April 11, 2018

The maps in this archive display estimated intensities and ground motions for the largest earthquakes in the HayWired aftershock sequence. The aftershock sequence follows the HayWired M7.0 mainshock that is imagined to occur on April 18, 2018 along the Hayward Fault.These maps have been used in analyses of the HayWired scenario.

Interactive map showing earthquake scenario data
April 11, 2018

The HayWired scenario depicts a hypothetical M7.0 earthquake on California’s Hayward Fault. This site includes an interactive map showing fault traces and ShakeMap contours, information on the tectonic setting of the Hayward Fault and fault rupture history; and a USGS ShakeMap, which provides ground motion information for the HayWired scenario mainshock.

screen shot of home page of story map
March 23, 2018

What might it be like the next time the Hayward Fault has a large earthquake? A geonarrative and related imagery examines a hypothetical earthquake, the magnitude 7.0 HayWired earthquake scenario.

CITE
January 30, 2018

Scientists at WERC's Dixon Field station have fitted Cinnamon Teal with GPS backpacks. Using R, the telemetry locations are displayed on an image every two weeks.

CITE
January 10, 2018

Scientists at WERC's Dixon Field station have fitted Cinnamon Teal with GPS backpacks. Using R, the telemetry locations are displayed on an image every two weeks.

CITE
January 10, 2018

Scientists at WERC's Dixon Field station have fitted Cinnamon Teal with GPS backpacks. Using R, the telemetry locations are displayed on an image every two weeks.

 location of and evidence for recent movement on active fault traces within the Hayward Fault Zone, California
January 1, 2018

An interactive geonarrative (Esri Story Map) showing 62 field trip stops for exploring the Hayward Fault in the East San Francisco Bay Region of California.

Fog over Point Reyes, CA
November 2, 2017

Network with us to study fog. Add your research site. Add your fog water collecting site. Add information about your research or studies. Help create a vibrant place to learn about fog, stratus, low clouds, and the ecosystems alive with fog.

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Year Published: 2020

Caltech/USGS Southern California Seismic Network (SCSN) and Southern California Earthquake Data Center (SCEDC): Data availability for the 2019 Ridgecrest sequence

The 2019 M6.4 and M7.1 Ridgecrest earthquake sequence occurred in the eastern California shear zone (ECSZ). The mainshock ruptured the Little Lake fault zone and aftershocks extended from the Garlock fault in the south, to the southern end of the 1872 M7.5 Owens Valley earthquake rupture in the north. We present data from the Southern California...

Hauksson, Egill; Yoon, Clara; Yu, Ellen; Andrews, Jennifer; Alvarez, Mark; Bhadha, Rayo; Thomas, Valerie

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Year Published: 2020

Using a dense seismic array to determine structure and site effects of the Two Towers earthflow in northern California

We deployed a network of 68 three-component geophones on the slow moving Two Towers earthflow in northern California. We compute horizontal-to-vertical spectral ratios (HVSRs) from the ambient seismic field. The HVSRs have two prominent peaks, one near 1.23 Hz and another between 4 and 8 Hz at most stations. The 1.23 Hz resonance is a property...

Thomas, Amanda M.; Spica, Zack; Bodmer, Miles; Schulz, William; Roering, Joshua J.

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Year Published: 2020

U.S. Geological Survey Earthquake Science Center

The mission of the U.S. Geological Survey (USGS) Earthquake Science Center is to collect a wide range of data on earthquakes, faults, and crustal deformation; conduct research to increase our understanding of earthquake source processes, occurrence, and effects; and synthesize this knowledge into probabilistic seismic hazard assessments,...

Hickman, Stephen H.
This publication is available at https://pubs.er.usgs.gov/publication/fs20193067. After the Digital Object Identifier and product metadata have been registered by Crossref, the official URL will be https://doi.org/10.3133/fs20193067.

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Year Published: 2019

Seismic evaluation of shallow-depth structure, faulting, and groundwater variations across the Dos Palmas Preserve, Riverside County, California

IntroductionDos Palmas Preserve is a Colorado Desert oasis and wetland in Riverside County, California, located near the base of the Orocopia Mountains and northeast of the Salton Sea. The original source of water for the oasis was artesian springs that developed at the base of the Orocopia Mountains, but more abundant water supplies were later...

Catchings, Rufus D.; Goldman, Mark R.; Chan, Joanne H.; Sickler, Robert R.; Rymer, Michael J.; Criley, Coyn J.
Catchings, R.D., Goldman, M.R., Chan, J.H., Sickler, R.R., Rymer, M.J., and Criley, C.J., 2020, Seismic evaluation of shallow-depth structure, faulting, and groundwater variations across the Dos Palmas Preserve, Riverside County, California: U.S. Geological Survey Open-File Report 2019–1130, 21 p., https://doi.org/ 10.3133/ofr20191130.

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Year Published: 2019

The behavior of the Salesforce Tower, the tallest building in San Francisco, California inferred from earthquake and ambient shaking

The newly constructed tallest building designed in conformance with performance-based design procedure in San Francisco, California is a 61-story building equipped with an accelerometric array that recorded the January 4, 2018 M4.4 Berkeley earthquake. The building is designed with concrete core shear walls and perimeter gravity steel columns. The...

Celebi, Mehmet; Haddadi, H.; Huang, Moh; Valley, Michael; Hooper, John; Klemencic, Ron

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Year Published: 2019

Using the STARS Model to evaluate the effects of two proposed projects for the long-term operation of State Water Project Incidental Take Permit Application and CEQA compliance

The California Department of Water Resources (DWR) requested analysis of juvenile Chinook salmon survival in the Sacramento-San Joaquin River Delta (henceforth identified as “the Delta”) as part of an effects analysis that will be included in an Incidental Take Permit (ITP) Application. This application is in compliance with the California...

Perry, Russell W.; Hansen, Amy C.; Evans, Scott D.; Kock, Tobias J.
Perry, R.W., Hansen, A.C., Evans, S.D., and Kock, T.J., 2019, Using the STARS Model to evaluate the effects of two proposed projects for the long-term operation of State Water Project Incidental Take Permit Application and CEQA compliance (ver. 2.0, February 2020): U.S. Geological Survey Open-File Report 2019-1127, 39 p. plus appendixes, https://doi.org/10.3133/ofr20191127.

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Year Published: 2019

Using the STARS model to evaluate the effects of the proposed action for the reinitiation of consultation on the coordinated long-term operation of the Central Valley and State Water Project

In 2016, the U.S. Bureau of Reclamation (USBR) and California Department of Water Resources requested a reinitiation of consultation under Section 7 of the Endangered Species Act on the coordinated long-term operations of the Central Valley and State Water Projects. This resulted in a Biological Assessment released by USBR in 2019. In its analysis...

Perry, Russell W.; Pope, Adam C.; Sridharan, Vamsi K.
Perry, R.W., Pope, A.C., and Sridharan, V.K., 2019, Using the STARS model to evaluate the effects of the proposed action for the reinitiation of consultation on the coordinated long-term operation of the Central Valley and State Water Project: U.S. Geological Survey Open-File Report 2019–1125, 31 p. plus appendixes, https://doi.org/10.3133/ofr20191125.

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Year Published: 2019

Simple metrics predict salt-marsh sediment fluxes

The growth (or decay) of salt marshes depends on suspended-sediment flux into and out of the marsh. Suspended-sediment concentration (SSC) is a key element of the flux, and SSC-based metrics reflect the long-term sediment-flux trajectories of a variety of salt marshes. One metric, the flood–ebb SSC differential, correlates with area-normalized...

Nowacki, Daniel J. ; Ganju, Neil Kamal

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Year Published: 2019

Precision of VS30 values derived from noninvasive surface wave methods at 31 sites in California

We study the inter- and intra-method variability of VS30 results by inverting/forward-modeling individual dispersion data for 31 seismographic stations located in California where combinations of surface-wave methods were applied and the minimum recorded wavelength from each method satisfies the 30-meter depth criteria. These methods consist of...

Yong, Alan K.; Martin, Antony; Boatwright, Jack

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Year Published: 2019

Coseismic slip and early afterslip of the M6.0 August 24, 2014 South Napa, California, earthquake

We employ strong motion seismograms and static offsets from the Global Positioning System, Interferometric Synthetic Aperture Radar, and other measurements in order to derive a coseismic slip and afterslip model of the M6.0 24 August 2014 South Napa earthquake. This earthquake ruptured an ∼13‐km‐long portion of the West Napa fault with...

Pollitz, Fred; Murray, Jessica R.; Minson, Sarah E.; Wicks, Charles W.; Svarc, Jerry L.; Brooks, Benjamin A.

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Year Published: 2019

A multidisciplinary coastal vulnerability assessment for local government focused on ecosystems, Santa Barbara area, California

Incorporating coastal ecosystems in climate adaptation planning is needed to maintain the well-being of both natural and human systems. Our vulnerability study uses a multidisciplinary approach to evaluate climate change vulnerability of an urbanized coastal community that could serve as a model approach for communities worldwide, particularly in...

Myers, Monique; Barnard, Patrick L.; Beighley, Edward; Cayan, Daniel R.; Dugan, Jenifer E.; Feng, Dongmei; Iacobellis, Samuel F.; Melack, John M.; Page, Henry M.

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Year Published: 2019

Using the stream salmonid simulator (S3) to assess juvenile Chinook salmon (Oncorhynchus tshawytscha) production under historical and proposed action flows in the Klamath River, California

Executive SummaryThe production of Klamath River fall Chinook salmon (Oncorhynchus tshawytscha) in northern California and southern Oregon is thought to be limited by poor survival during freshwater juvenile life stages, in part a result of Ceratonova shasta—a highly infectious disease that can lead to high fish mortality. Higher flushing river...

Plumb, John M.; Perry, Russell W.; Som, Nicholas A.; Alexander, Julie; Hetrick, Nicholas J.
Plumb, J.M., Perry, R.W., Som, N.A., Alexander, J., and Hetrick, N.J., 2019, Using the stream salmonid simulator (S3) to assess juvenile Chinook salmon (Oncorhynchus tshawytscha) production under historical and proposed action flows in the Klamath River, California: U.S. Geological Survey Open-File Report 2019-1099, 43 p., https://doi.org/10.3133/ofr20191099.

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June 11, 2020

Land Treatment Exploration Tool — Step 3: Explore Site Characteristics

This video describes Step 3 of the Land Treatment Exploration Tool. In Step 3 the user is guided to the Site History tab to explore land treatment and wildfire history of their planned treatment area. They are also directed to the Fish and Wildfire Information for Planning and Consultation tool to investigate areas of overlap with endangered species, migratory birds, and

June 11, 2020

Land Treatment Exploration Tool— Step 4: Prop. Treatment Area & Report

This video describes Step 4 and the developing report of the Land Treatment Exploration Tool. In Step 4 the used selects layers to generate spatial overlap statistics with their planned treatment boundary. Summary tables are generated and displayed in the Report tab, where a user can create a PDF Site Characterization Report for their planned treatment boundary. Optionally

June 11, 2020

Land Treatment Exploration Tool — Step 5: Select Search Parameters

This video describes Step 5 of the Land Treatment Exploration Tool. In Step 5 the user determines a distance or boundary to search for legacy Land Treatment Digital Library records. The user also indicates if the returned LTDL treatments are statistically evaluated against the planned treatment boundary using a Bray-Curtis Dissimilarity calculation.

These tutorial

June 11, 2020

Land Treatment Exploration Tool — Step 6: Compare the LTDL Treatments

This video describes Step 6 of the Land Treatment Exploration Tool. In Step 6 the user filters through the returned list of legacy LTDL treatments to identify records that contain useful information or context for the current planned treatment boundary. Selected treatments are added to the developing report and subsequent exported Site Characterization PDFs.  

These

Illustration of the seafloor showing depth and locations of surveys.
June 5, 2020

Figure 5 offshore Morro Bay seafloor detail

Colored shaded-relief bathymetry including pockmarks offshore Morro Bay, California. Map generated from AUV-based multibeam bathymetry data collected by MBARI.

Figure 1: EXPRESS surveys, dives, and sampling locations
Figure 2: 

...
Illustration of a coastal area with lines, dots, and boxes drawn on it to show where data was collected.
June 5, 2020

EXPRESS surveys, dives, and sampling locations

The west coast of the United States showing locations of EXPRESS ship-based multibeam surveys, ROV dives, AUV dives, and sediment samples. Red boxes show locations of close-up views of multibeam bathymetry in Figures 2 and 3.

Figure 1: EXPRESS surveys, dives, and sampling

...
Illustration of the seafloor that shows depth, and where data was collected.
June 5, 2020

Trinidad submarine canyon bathymetry

Colored, shaded-relief bathymetry of Trinidad Submarine Canyon northwest of Humboldt Bay in northern California. Area is in the vicinity of a potential offshore renewable energy development. See larger map for location.

Figure 1: 

...
Illustration of the seafloor off a coastal area, with lines and dots to show where data was collected.
June 5, 2020

Offshore central California bathymetry

Colored, shaded-relief bathymetry offshore central California. Data supported management of National Marine Sanctuaries and prospective renewable energy decisions. Black ovals are locations of AUV-based multibeam surveys. Close-up views of two AUV surveys are shown in Figures 4 and 5.

Figure 1: 

...
Illustration of the seafloor showing depth and locations of surveys.
June 5, 2020

Figure 4 offshore Morro Bay seafloor detail

Colored shaded-relief bathymetry including submarine channels and pockmarks offshore Morro Bay, California. Map generated from AUV-based multibeam bathymetry data collected by MBARI both prior to and as a part of EXPRESS.

Figure 1: EXPRESS surveys, dives, and sampling locations

...
May 21, 2020

Count the bats -- how do your skills compare to a bat biologist's?

Do you have what it takes to be a bat biologist? USGS bat researchers are counting Townsend’s big eared bats to monitor how their populations are doing. Watch the video to try your hand at a bat count and see how your skills compare to a USGS scientist! You don’t need sound to count the bats—but if you turn your sound on you’ll be able to hear the bats’ echolocation calls

A man stands on the bow of a small aluminum boat wearing bib waders, a personal floatation device, and a mask.
May 4, 2020

The new face of fieldwork

Marine technician Dan Powers, from the Pacific Coastal and Marine Science Center's Marine Facility (PCMSC MarFac), wears all the required personal protective equipment: bib waders, personal floatation device, and mask. He and MarFac engineering technician Pete Dal Ferro went out on Alviso Slough to retrieve and clean current meters that are secured to metal frames. The

...
A man navigates a personal watercraft slowly out of a harbor along a jetty.
March 12, 2020

Personal watercraft equipped with sonar and GPS

A USGS scientist navigates a personal watercraft (PWC) slowly through Elkhorn Slough. The PWC is equipped with an echosounder and GPS, to record accurate depth and location. This mapping effort is part of recurring surveys in the Monterey Bay area. Data from these surveys help the USGS understand how sand moves around the Bay, how the beaches, inlets, harbors, and other

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color photo of helicopter over fire
November 27, 2020

In his regular job, EROS Scientist Kurtis Nelson manages post-fire mapping activities at EROS—the largest being Monitoring Trends in Burn Severity, and the Department of Interior’s (DOI) Burned Area Emergency Response (BAER) support. But for 21 days this past August and September, he did something more.

Colored, shaded-relief terrain map of Brushy Butte Volcano
November 12, 2020

The U.S. Geological Survey (USGS) has 5 volcano observatories tasked with monitoring low to high threat volcanoes throughout the United States. 

Newly formed wetland that formed as the Salton Sea level lowers
November 5, 2020

In the past decade, Salton Sea water elevation has declined due to drought, lining of canals, and changes to management of the Colorado River. This has resulted in the creation of new wetlands caused by drains and rivers no longer reaching the Salton Sea.

map of swarm area showing earthquakes as circles
September 30, 2020

A swarm of earthquakes southeast of the Salton Sea, in the Brawley seismic zone, began on Sept. 30, 2020.

Forecast last updated October 7, 2020 at 8:00am PDT.

Two maps illustrate two states of computer modeling scenarios around a large bay and coastal area.
September 30, 2020

A new model that combines sea-level rise scenarios and information about associated groundwater level responses shows that coastal water tables will rise as groundwater levels are pushed up by landward intrusions of seawater due to sea-level rise.

Hells Canyon on the Snake River
September 28, 2020

SPARROW mappers are interactive tools that allow users to evaluate streamflow and nutrient and sediment conditions as well as the importance of different sources of contaminants in a selected river basin. Data can be visualized at different scales using maps and interactive graphs and tables.

USGS scientist conducting research on the San Francisco Bay‐Delta
September 18, 2020

The health of the San Francisco Bay‐Delta depends on a sediment supply that has been recently declining due to sediment trapping in upstream reservoirs. Reduced sediment supply increases water clarity in the Bay-Delta, which in turn influences ecological processes and aquatic life.

Image shows a photograph of Walker Lane, a region in Western Nevada
September 17, 2020

A multiagency partnership led by the USGS and the Department of Energy seeks to shed light on lithium and other critical mineral resource potential as well as geothermal energy potential in western Nevada

Image shows a geologic map of Nevada
September 16, 2020

In a joint blog post hosted by the Department of Energy's Office of Energy Efficiency and Rewenable Energy, DOE EERE Assistant Secretary Dan Simmons and Department of the Interior Assistant Secretary for Water and Science Tim Petty announce a new partnership for geothermal energy and critical mineral research in western Nevada.

Animation of Growth to Pine Gulch Fire
September 3, 2020

The accumulated wildfires engulfing miles of California countryside in the late summer of 2020 are historic in their collective size: more than 500 fires burning across hundreds of thousands of acres.

Periphyton and nearshore groundwater sampling locations.
August 25, 2020

The USGS Nevada and California Water Science Centers participate in annual Lake Tahoe Summit

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