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: October 14, 2019
Status: Active

Topobathymetric Elevation Model of San Francisco Bay Area, California

Accurate, high-resolution elevation information is vital to understanding the natural hazards that can impact the highly populated San Francisco Bay area, such as sea-level rise, winter storms, cliff erosion, and other coastal hazards. The San Francisco Bay estuary three-dimensional (3D) topobathymetric digital elevation model (TBDEM) was developed in collaboration between ...

Date published: October 8, 2019
Status: Completed

Earthquake Early Warning – Fine-Tuning for Best Alerts

The goal of an earthquake early warning (EEW) system is to provide an alert to people and automatic systems after an earthquake begins but before the shaking reaches their location. As the USGS and its partners are developing an EEW system, called ShakeAlert®, for the West Coast, the benefits, costs, capabilities, and limitations are being investigated. Two recent studies explored the...

Date published: September 30, 2019
Status: Completed

Could the M7.1 Ridgecrest, CA Earthquake Sequence Trigger a Large Earthquake Nearby?

Release Date: SEPTEMBER 30, 2019

Two of the first questions that come to mind for anyone who just felt an earthquake are, “Will there be another one?” and “Will it be larger?”.

Date published: August 26, 2019
Status: Completed

Loma Prieta Earthquake Professional Papers

The four Loma Prieta Earthquake Professional Papers, which were published as multiple chapters, comprehensively document the magnitude 6.9 earthquake in California that shook the San Francisco and Monterey Bay regions on October 17, 1989. They contain almost 3000 pages written by 401 investigators of the earthquake. The investigations were funded by a special Congressional appropriation to the...

Date published: August 21, 2019
Status: Active

Directions

Information to help you plan your visit to the Earthquake Science Center.

Date published: August 5, 2019
Status: Completed

M7.9 1857 Fort Tejon Earthquake

The Last "Big One" in Southern California.

Date published: August 5, 2019
Status: Completed

M6.9 October 17, 1989 Loma Prieta Earthquake

On October 17, 1989, at 5:04:15 p.m. (PDT), a magnitude 6.9 earthquake severely shook the San Francisco and Monterey Bay regions. The epicenter was located near Loma Prieta peak in the Santa Cruz Mountains, approximately 14 km (9 mi) northeast of Santa Cruz and 96 km (60 mi) south-southeast of San Francisco.

Date published: August 5, 2019
Status: Completed

M6.0 South Napa, California Earthquake – August 24, 2014

  

Date published: July 26, 2019
Status: Active

CoSMoS 3.0: Southern California

CoSMoS 3.0 for southern California provides detailed predictions of coastal flooding due to both future sea-level rise and storms, integrated with predictions of long-term coastal evolution (beach changes and coastal cliff retreat) for the Southern California region, from Point Conception (Santa Barbara County) to Imperial Beach (San Diego County).

Date published: July 26, 2019
Status: Active

CoSMoS 2.1: San Francisco Bay

With primary support from the National Estuarine Research Reserve (NERR), CoSMoS is set-up within the San Francisco Bay as part of Our Coast Our Future (OCOF).

Date published: July 26, 2019
Status: Active

CoSMoS 2.0: North-central California (outer coast)

Our Coast Our Future (OCOF) is a collaborative, user-driven project providing science-based decision-support tools to help coastal planners and emergency responders understand, visualize, and anticipate local impacts from sea-level rise (SLR) and storms in the San Francisco Bay region.

Date published: July 18, 2019
Status: Active

Western Basin & Range - Eastern California Shear Zone

 

The Eastern California Shear Zone (ECSZ) Mapping project, funded by the National Cooperative Geologic Mapping Program, combines surficial and bedrock geologic mapping, geophysical surveys, and high-resolution topographic data analysis with neotectonic, geomorphic, structural, volcanic, and geochronologic studies to better understand the tectonic framework and landscape...

Contacts: Andrew Cyr
Filter Total Items: 533
Date published: April 23, 2020

2019 Santa Ana Reach Habitat Data

This dataset includes 2019 reach habitat data for the Santa Ana Sucker (Catostomus santaanae) and the Arroyo Chub (Gila orcutti) in the Santa Ana River.

Date published: April 23, 2020

SAR 2019 Santa Ana River Reach Fish Data

This dataset contains the 2019 reach fish data for the Santa Ana Sucker (Catostomus santaanae) and the Arroyo Chub (Gila orcutti) in the Santa Ana River, California.

Date published: April 16, 2020

Blank results for trace-element data collected for the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project, October 2009–October 2018

Groundwater samples have been collected in California as part of statewide investigations of groundwater quality conducted by the U.S. Geological Survey for the Groundwater Ambient Monitoring and Assessment (GAMA) Priority Basin Project (PBP). Quality-control samples are routinely collected as part of the GAMA-PBP quality assurance plan. Olsen and others (2010) and Davis and others %2

Date published: March 31, 2020

Minisparker and chirp seismic-reflection data of field activity 2014-645-FA; offshore Santa Barbara, southern California from 2014-11-12 to 2014-11-25

USGS collected high-resolution multichannel minisparker and single-channel chirp seismic-reflection data in November 2014, in the offshore Catalina and Santa Cruz basins, which are surrounded by several of the southern California Channel Islands. The survey was designed to image areas of the seafloor associated with movement on the numerous faults offshore of southern California.

Date published: March 31, 2020

2016 Zooplankton sampling in San Joaquin River and False River near Jersey Island in the Sacramento-San Joaquin River Delta of Contra Costa County, California, USA (ver. 2.0, April 2020)

This data set contains information on zooplankton and associated environmental parameters for sampling conducted in the San Joaquin River and False River near their confluence at Jersey Point (Contra Costa County, California), during February-March, 2016. Macrozooplankton were sampled with vertical tows (bottom to surface) of a 50 cm-diameter conical plankton net that was 150cm lon

Date published: March 30, 2020

Historical produced water chemistry data compiled for selected oil fields in Los Angeles and Orange Counties, southern California

This digital dataset contains historical geochemical and other information for 200 samples of produced water from 182 sites in 25 oil fields in Los Angeles and Orange Counties, southern California. Produced water is a term used in the oil industry to describe water that is produced as a byproduct along with the oil and gas. The locations from which these historical samples have been collected...

Date published: March 27, 2020

Multichannel minisparker and chirp seismic reflection data of USGS field activity 2016-616-FA collected in the Catalina Basin offshore southern California in February 2016

This data release contains 25 multichannel minisparker seismic reflection (MCS) profiles and 41 chirp sub-bottom profiles collected in February of 2016 from the Catalina Basin offshore southern California by PCMSC  in cooperation with the University of Washington. We collected data on R/V Thompson on USGS cruise 2016-616-FA. We collected MCS profiles to image the fault and channel...

Date published: March 27, 2020

Multichannel minisparker seismic-reflection data of USGS field activity 2016-616-FA collected in the Catalina Basin offshore southern California in February 2016

This data release contains 25 multichannel minisparker seismic reflection (MCS) profiles that were collected in February of 2016 from the Catalina Basin offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center in cooperation with the University of Washington. Data were collected aboard the University of Washington’s R/V Thomas G. Thompson

Date published: March 27, 2020

Chirp seismic-reflection data of USGS field activity 2016-616-FA collected in the Catalina Basin offshore southern California in February 2016

This data release contains 41 chirp sub-bottom profiles that were collected in February of 2016 from the Catalina Basin offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center in cooperation with the University of Washington. Data were collected aboard the University of Washington’s R/V Thomas G. Thompson on USGS cruise 2016-616-FA. Chirp pro

Date published: March 25, 2020

Public-Supply Well Water Quality Results: Inorganic Data and Trends, 1974 - 2014 (California GAMA-PBP)

The GAMA-PBP Public-Supply Well Results data viewer allows the user to visualize and download California water-quality data and trends for1974 - 2014. Groundwater-quality data for 38 inorganic constituents are captured and can be downloaded for individual sites or by grid cell. 

Date published: March 25, 2020

Electrical Resistivity Tomography in the Anza-Terwilliger Valley, Riverside County, California 2018

The Cahuilla Valley and Terwilliger Valley groundwater basins, 9-006 and 7-026 respectively (California Department of Water Resources 2016) located approximately 25 miles southwest of Palm Springs, are the sole-source for groundwater supply for the rural disadvantaged community and two Native American Tribes, the Ramona Band of Cahuilla and the Cahuilla. The characteristics and sustaina

Date published: March 25, 2020

Electrical Resistivity Tomography GIS Data near Anza, Riverside County, California, 2018

The Cahuilla Valley and Terwilliger Valley groundwater basins, 9-006 and 7-026 respectively (California Department of Water Resources 2016) located approximately 25 miles southwest of Palm Springs, are the sole-source for groundwater supply for the rural disadvantaged community and two Native American Tribes, the Ramona Band of Cahuilla and the Cahuilla. The characteristics and sustaina

Filter Total Items: 382
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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

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Year Published: 2018

Seafloor fluid seeps on Kimki Ridge, offshore southern California: Links to active strike-slip faulting

The Kimki Ridge fluid seeps are located in western Catalina Basin about 60 km southwest of the southern California mainland and at a water depth of approximately 1100 m. Multichannel seismic reflection profiles collected by the U.S. Geological Survey (USGS) in 2014 show acoustic transparency within the Kimki...

Conrad, James E.; Prouty, Nancy G.; Walton, Maureen A. L.; Kluesner, Jared W.; Maier, Katherine L.; McGann, Mary; Brothers, Daniel; Roland, Emily C.; Dartnell, Peter

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Year Published: 2017

A prototype operational earthquake loss model for California based on UCERF3-ETAS – A first look at valuation

We present a prototype operational loss model based on UCERF3-ETAS, which is the third Uniform California Earthquake Rupture Forecast with an Epidemic Type Aftershock Sequence (ETAS) component. As such, UCERF3-ETAS represents the first earthquake forecast to relax fault segmentation assumptions and to include multi-fault ruptures, elastic-rebound...

Field, Edward H.; Porter, Keith; Milner, Kevn
Field, E. H., K. Porter, and K. Milner (2017). A Prototype Operational Earthquake Loss Model for California Based on UCERF3-ETAS – A First Look at Valuation, Earthquake Spectra, Volume 33, No. 4, pages 1–21, DOI: 10.1193/011817EQS017M

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Year Published: 2017

Reconstructing the evolution of the submarine Monterey Canyon System from Os, Nd, and Pb isotopes in hydrogenetic Fe-Mn crusts

The sources of terrestrial material delivered to the California margin over the past 7 Myr were assessed using 187Os/188Os, Nd, and Pb isotopes in hydrogenetic ferromanganese crusts from three seamounts along the central and southern California margin. From 6.8 to 4.5 (± 0.5) Ma, all three isotope systems show more radiogenic values at...

Conrad, T.A.; Nielsen, S.G.; Peucker-Ehrenbrink, Bernhard; Blusztajn, J.; Winslow, D.; Hein, James R.; Paytan, A.
T.A. Conrad, S.G. Nielsen, B. Peucker-Ehrenbrink, J. Blusztajn, D. Winslow, J.R. Hein, A. Paytan, 2017, Reconstructing the evolution of the submarine Monterey Canyon System from Os, Nd, and Pb isotopes in hydrogenetic Fe-Mn crusts: Geochemstry, Geophysics, Geosystems, https://doi.org/10.1002/2017GC007071.

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Year Published: 2017

Seismic response of soft deposits due to landslide: The Mission Peak, California, landslide

The seismic response of active and intermittently active landslides is an important issue to resolve to determine if such landslides present an elevated hazard in future earthquakes. To study the response of landslide deposits, seismographs were placed on the Mission Peak landslide in the eastern San Francisco Bay region for a period of one year....

Hartzell, Stephen H.; Leeds, Alena L.; Jibson, Randall W.
Stephen Hartzell, Alena L. Leeds, Randall W. Jibson; Seismic Response of Soft Deposits due to Landslide: The Mission Peak, California, Landslide. Bulletin of the Seismological Society of America ; 107 (5): 2008–2020. doi: https://doi.org/10.1785/0120170033

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Year Published: 2017

Science advancements key to increasing management value of life stage monitoring networks for endangered Sacramento River winter-run Chinook salmon in California

A robust monitoring network that provides quantitative information about the status of imperiled species at key life stages and geographic locations over time is fundamental for sustainable management of fisheries resources. For anadromous species, management actions in one geographic domain can substantially affect abundance of subsequent life...

Johnson, Rachel C.; Windell, Sean; Brandes, Patricia L.; Conrad, J. Louise; Ferguson, John; Goertler, Pascale A. L.; Harvey, Brett N.; Heublein, Joseph; Isreal, Joshua A.; Kratville, Daniel W.; Kirsch, Joseph E.; Perry, Russell W.; Pisciotto, Joseph; Poytress, William R.; Reece, Kevin; Swart, Brycen G.
Johnson, R.C., S. Windell, P.L. Brandes, J. L. Conrad, J. Ferguson, P.A.L. Goertler, B.N. Harvey, J. Houblein, J.A. Isreal, D.W. Kratville, J.E. Kirsch, R.W. Perry, J. Pisciotto, W.R. Poytress, K. Reece, and B.G. Swart. 2017. Science advancements key to increasing management value of life stage monitoring networks for endangered Sacramento River winter-run Chinook salmon in California. San Francisco Estuary and Watershed Science, 15(3): Article 1, 41 p.

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Year Published: 2017

Refining fault slip rates using multiple displaced terrace risers—An example from the Honey Lake fault, NE California, USA

Faulted terrace risers are semi-planar features commonly used to constrain Quaternary slip rates along strike-slip faults. These landforms are difficult to date directly and therefore their ages are commonly bracketed by age estimates of the adjacent upper and lower terrace surfaces. However, substantial differences in the ages of the upper and...

Gold, Ryan D.; Briggs, Richard W.; Crone, Anthony J.; Duross, Christopher
Gold, R.D., Briggs, R.W., Crone, A.J., DuRoss, C.B., 2017. Refining fault slip rates using multiple displaced terrace risers—An example from the Honey Lake fault, NE California, USA. Earth and Planetary Science Letters 477, 134-146.

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Year Published: 2017

Refining fault slip rates using multiple displaced terrace risers—An example from the Honey Lake fault, NE California, USA

Faulted terrace risers are semi-planar features commonly used to constrain Quaternary slip rates along strike-slip faults. These landforms are difficult to date directly and therefore their ages are commonly bracketed by age estimates of the adjacent upper and lower terrace surfaces. However, substantial differences in the ages of the upper and...

Gold, Ryan D.; Briggs, Richard W.; Crone, Anthony J.; Duross, Christopher
Gold, R.D., Briggs, R.W., Crone, A.J., DuRoss, C.B., 2017. Refining fault slip rates using multiple displaced terrace risers—An example from the Honey Lake fault, NE California, USA. Earth and Planetary Science Letters 477, 134-146.

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Year Published: 2017

Yolo Bypass Juvenile Salmon Utilization Study 2016—Summary of acoustically tagged juvenile salmon and study fish release, Sacramento River, California

The Yolo Bypass is a flood control bypass in Sacramento Valley, California. Flood plain habitats may be used for juvenile salmon rearing, however, the potential value of such habitats can be difficult to evaluate because of the intermittent nature of inundation events. The Yolo Bypass Juvenile Salmon Utilization Study (YBUS) used acoustic...

Liedtke, Theresa L.; Hurst, William R.
Liedtke, T.L., and Hurst, W.R., 2017, Yolo Bypass Juvenile Salmon Utilization Study 2016—Summary of acoustically tagged juvenile salmon and study fish release, Sacramento River, California: U.S. Geological Survey Data Series 1066, 49 p., https://doi.org/10.3133/ds1066.

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Year Published: 2017

A synoptic view of the Third Uniform California Earthquake Rupture Forecast (UCERF3)

Probabilistic forecasting of earthquake‐producing fault ruptures informs all major decisions aimed at reducing seismic risk and improving earthquake resilience. Earthquake forecasting models rely on two scales of hazard evolution: long‐term (decades to centuries) probabilities of fault rupture, constrained by stress renewal statistics, and short‐...

Field, Edward H.; Jordan, Thomas H.; Page, Morgan T.; Milner, Kevin R.; Shaw, Bruce E.; Dawson, Timothy E.; Biasi, Glenn; Parsons, Thomas E.; Hardebeck, Jeanne L.; Michael, Andrew J.; Weldon, Ray; Powers, Peter M.; Johnson, Kaj M.; Zeng, Yuehua; Bird, Peter; Felzer, Karen; van der Elst, Nicholas; Madden, Christopher; Arrowsmith, Ramon; Werner, Maximillan J.; Thatcher, Wayne R.

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Year Published: 2017

The transtensional offshore portion of the northern San Andreas fault: Fault zone geometry, late Pleistocene to Holocene sediment deposition, shallow deformation patterns, and asymmetric basin growth

We mapped an ~120 km offshore portion of the northern San Andreas fault (SAF) between Point Arena and Point Delgada using closely spaced seismic reflection profiles (1605 km), high-resolution multibeam bathymetry (~1600 km2), and marine magnetic data. This new data set documents SAF location and continuity, associated tectonic...

Beeson, Jeffrey W.; Johnson, Samuel Y.; Goldfinger, Chris
Beeson, J.W., Johnson, S.Y., and Goldfinger, C., 2017, The transtensional offshore portion of the northern San Andreas fault: Fault zone geometry, late Pleistocene to Holocene sediment deposition, shallow deformation patterns, and asymmetric basin growth: Geosphere, v. 13, n. 4, 34 p.,

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Year Published: 2017

Investigation of late Pleistocene and Holocene activity in the San Gregorio fault zone on the continental slope north of Monterey Canyon, offshore central California

We provide an extensive high‐resolution geophysical, sediment core, and radiocarbon dataset to address late Pleistocene and Holocene fault activity of the San Gregorio fault zone (SGFZ), offshore central California. The SGFZ occurs primarily offshore in the San Andreas fault system and has been accommodating dextral strike‐slip motion between the...

Maier, Katherine L.; Paull, Charles K.; Brothers, Daniel; Caress, David W.; McGann, Mary; Lundsten, Eve M.; Anderson, Krystle; Gwiazda, Roberto
Maier, K.L., Paull, C.K., Brothers, D.S., Caress, D.W., McGann, Mary, Lundsten, E.M., Anderson, Krystle, and Gwiazda, Roberto, 2017, Investigation of Late Pleistocene and Holocene Activity in the San Gregorio Fault Zone on the Continental Slope North of Monterey Canyon, Offshore Central California: Bulletin of the Seismological Society of America, v. 107, p. 1094-1106, doi: 10.1785/0120160261.

Filter Total Items: 1,076
A group of people help guide a yellow instrument, suspended from a cabling system, off a boat and into the ocean.
October 2, 2019

Lowering Chirp from R/V Bold Horizon

The crew of research vessel Bold Horizon with USGS science crew prepare to launch the Chirp sub-bottom profiler off the west coast near northern California and southern Oregon.

Photo looks at the very end of a metal coring device with mud in it, sitting on the deck of a ship in its metal launch.
October 1, 2019

Jumbo piston corer with mud from the seafloor

After recovery, the jumbo piston corer sits on the deck of research vessel Bold Horizon in its launch and recovery system. This muddy collar is removed to reveal the removable length of the core, which sits within a stiff plastic tube inside the metal tube.

September 30, 2019

Prototype Earthquake Early Warning System (Interview)

Retired seismologist David Oppenheimer reflects on the first prototype earthquake early warning system used during the 1989 Loma Prieta earthquake. Scientists deployed an analog system to notify first responders of impending earthquake activity as they worked on rescue efforts at the Cypress Viaduct collapse in Oakland, CA.
 

A small device sits on a tripod which rests on a square tarp pinned down on a flat area of grass.
September 30, 2019

GPS target

A global positioning system (GPS) sits on a tripod and is used to accurately pinpoint the center of a target that itself is used for photo rectification with aerial photos. 

A person on a personal watercraft navigates through waters near a coast with low cliffs and hills way off in background.
September 30, 2019

Santa Barbara survey

Goleta Beach in Santa Barbara experienced an unusual storm and large wave event in the Spring of 2014. Gaviota Pier, seen far off in the background, sustained heavy damage as did the restaurants on the pier and nearby. The USGS conducts seasonal surveys throught the year to see how the beaches are changing through time. Here, a USGS scientist navigates a personal

...
September 26, 2019

PubTalk 09/2019 — Bats in the West

Title: Bats in the West: Discoveries, Questions, and Future Research
By Gabriel A. Reyes, USGS Biologist

  • Learn about bat ecology, diversity, and the role they play in our ecosystem.
  • See how scientists are using a variety of methods including capture, acoustic monitoring, and tracking, to learn more about local bat species.
  • Find out how
person with yellow top and red hardhat
September 11, 2019

Scott Lydeen at 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.

man in the background of a view between clear tubing
September 11, 2019

High-resolution Water Quality Mapping on California's Bay-Delta

Hydrologist Brian Bergamaschi is seen through the USGS California Water Science Center Biogeochemistry Group's underwater water quality mapping manifold. This maze of tygon tubing allows water to be pumped onto a boat while underway, splits the water into multiple flowpaths, and passes the water to various flow-through water quality instruments through a manifold that

...
Quratulain Ahmed preserving samples in fume hood
September 9, 2019

Quratulain Ahmed preserving samples in fume hood

Quratulain Ahmed preserving samples in fume hood

Sydney Berrios running samples on Aqualog
September 8, 2019

Sydney Berrios running samples on Aqualog

Sydney Berrios running samples on Aqualog

Horiba Aqaulog - simultaneously measures absorbance spectra and fluorescence Excitation-Emission Matrices
September 6, 2019

Horiba Aqaulog

Horiba Aqaulog - simultaneously measures absorbance spectra and fluorescence

Filter Total Items: 963
research boat on delta
March 15, 2019

Earlier this month, over 40 scientists from the California Water Science Center attended the 2019 Interagency Ecological Program (IEP) Workshop in Folsom, California. 

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.

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