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: 416
Date published: January 20, 2021
Status: Active

Assessing Sediment Nutrient Storage and Release in California's Sacramento-San Joaquin Delta

Sediments represent an important pool of nutrients in the Sacramento-San Joaquin Delta (Delta). The exchange of nutrients between the water column and the benthos impacts water quality and effects phytoplankton, harmful algal blooms, aquatic vegetation, and drinking water quality. To date, there is very limited information about nutrient pools in Delta sediments, nor how these nutrients are...

Date published: December 31, 2020
Status: Active

San Francisco Bay geomorphology

This research is part of the project “Sediment Transport in Coastal Environments

Contacts: Bruce Jaffe
Date published: December 31, 2020
Status: Active

Drag and sediment transport: conditions at the bottom boundary

Research on bed sediment grain size, bedform morphology, vegetation characteristics, and sediment resuspension and transport is part of the Sediment Transport in Coastal Environments project.

Contacts: Jessie Lacy
Date published: December 16, 2020
Status: Active

2013 Springs Fire, Ventura County, California Landslide Monitoring Site

Recent Monitoring Data

Date published: December 16, 2020
Status: Active

U.S. Highway 50, CA Landslide Monitoring Site

Recent Monitoring Data

Date published: December 16, 2020
Status: Active

Coastal Storm Modeling System (CoSMoS)

The Coastal Storm Modeling System (CoSMoS) makes detailed predictions of storm-induced coastal flooding, erosion, and cliff failures over large geographic scales. CoSMoS was developed for hindcast studies, operational applications and future climate scenarios to provide emergency responders and coastal planners with critical storm-hazards information that can be used to increase public safety...

Date published: December 15, 2020
Status: Active

San Francisco Bay Area - Pacifica, CA (BALT4) Landslide Monitoring Site

Recent Monitoring Data

Date published: December 15, 2020
Status: Active

San Francisco Bay Area - Brisbane, CA (BALT3) Landslide Monitoring Site

Recent Monitoring Data

Date published: December 15, 2020
Status: Active

San Francisco Bay Area - Brisbane, CA (BALT3) Landslide Monitoring Site

Recent Monitoring Data

Filter Total Items: 550
Date published: February 22, 2021

Erodibility Data from Gust Erosion Chamber Experiments in Grizzly Bay and San Pablo Bay, California, Summer 2019

A Gust erosion chamber was used to apply horizontal shear stress to sediment cores obtained from San Pablo and Grizzly (within Suisun) Bays in California. A pair of sediment cores were collected from the same approximate locations in each bay six times between June 12th, 2019 and August 15th, 2019 for a total of 12 experiments and 24 sediment core results.

Date published: February 22, 2021

Verified Irrigated Agricultural Lands for the United States, 2002-17

The spatial extents of verified irrigated lands were compiled from various federal and state sources across the nation and combined into a single Geographic Information System (GIS) geodatabase for the purpose of model training and validation.

Date published: February 22, 2021

High-Resolution Measurements to Identify Effects of Aquatic Vegetation on Water Quality and Stratification

The dataset documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta of the Sacramento-San Joaquin River Delta of California, USA.

Date published: February 22, 2021

Insecticide and fungicide concentrations in irrigation runoff and soils from a lettuce field in the Salinas Valley, California, 2019 and 2020

Irrigation runoff and soil samples were collected from a lettuce field located at the USDA-ARS Spence Research farm in the Salinas Valley, California to measure neonicotinoid insecticides (clothianidin and imidacloprid) and a fungicide (azoxystrobin) applied via coated seed and drench treatments.

Date published: February 8, 2021

Water chemistry data for samples collected at groundwater sites near the Oxnard oil field, June 2017-August 2017, Ventura County, California

In cooperation with the California State Water Resources Control Board's oil and gas Regional Monitoring Program, the U.S. Geological Survey collected and analyzed groundwater and associated quality control (QC) samples during June 2017 - August 2017.

Date published: January 26, 2021

Hydrodynamic and sediment transport data from San Pablo Bay and Grizzly Bay, California, 2019

USGS scientists collected hydrodynamic and sediment-transport data at shallow water sites in San Pablo Bay and Grizzly Bay, in northern San Francisco Bay between June and November 2019. The data were collected to determine hydrodynamic forcing, bed roughness, suspended-sediment concentration, and physical properties of the sediment bed. This data release includes hydrodynamic and sediment...

Date published: January 25, 2021

Diets and Stable Isotopes of Fishes in Rodeo Lagoon, California, 2016-2017

This dataset includes lab data for fish, fish diets, and stable isotopes for fish tissue, vegetation, and invertebrates collected during daylight hours in the Rodeo Lagoon and Lake in Golden Gate National Recreation Area at the Pacific Coast, USA during 2016 and 2017. This data release includes all animal taxa, and isotope values included in the analysis.

Date published: January 21, 2021

Hydrogeology of the Adelaida Area, San Luis Obispo County, CA

The USGS is conducting a comprehensive evaluation of groundwater resources of the Adelaida area. Use this map to explore the hydrogeology of the area, including land use, geology, and USGS hydrologic data by watershed or water management district. 

Date published: January 19, 2021

Electrical Resistivity Tomography Data at Elizabeth Lake, Los Angeles County, California, 2019

The Santa Clara River Lakes, located along the San Andreas fault 19 miles northwest of Palmdale, California, were placed on the state’s “303(d) List” or “Impaired Water List” in 1996 for eutrophic conditions, high pH, and low dissolved oxygen. In 2016, the state adopted a Total Maximum Daily Load (TMDL) for nutrients (nitrogen and phosphorus) in the Santa Clara River Lakes. This study focuses...

Date published: December 31, 2020

California shorelines and shoreline change data, 1998-2016

Mean high water shorelines along the coast of California for the years 1998-2002, 2015, and 2016 were extracted from LiDAR digital elevation models using ArcGIS. The Digital Shoreline Analysis System was used to calculate net shoreline movement between the pre-El Niño and post-El Niño shorelines, as a proxy for sandy shoreline change throughout the El Niño winter season. For a longer-term...

Date published: December 31, 2020

Pilot study on bathymetric change analyses in the Sacramento-San Joaquin Delta, California

This pilot study explores historic bathymetric change in the Delta. The earliest comprehensive surveys that covered a large portion of the Delta were conducted in the 1930s. These historic surveys are compared to recent surveys to document how sedimentation and erosion have changed the Delta. We selected regions for the pilot study based on availability of data, critical habitats, and...

Date published: December 28, 2020

California Groundwater Ambient Monitoring and Assessment (GAMA) Program Shallow Aquifer Assessment Study Unit Boundaries and Grid Cells for Assessment of Groundwater Resources

The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide assessment of groundwater quality designed to help better understand and identify risks to groundwater resources. GAMA is implemented by the California State Water Resources Control Board. The U.S. Geological Survey (USGS) is the technical lead for the Priority Basin Project (PBP), one of the

Filter Total Items: 45
scrublands with hills in the background
February 21, 2020

A portal for easy access to USGS data collected during hydrogeologic research projects in Anza Valley, CA

maps of Anza Valley, CA comparing land use in 1934 to 2005
February 21, 2020

Compares Anza Valley, CA land use data within the USGS study boundaries for 5 time periods between 1934 and 2005.

map of California shaded by GAMA deep aquifer study units
June 18, 2019

The GAMA program is a comprehensive statewide assessment designed to help better understand and identify risks to groundwater resources. Groundwater is sampled at many locations across California in order to characterize its constituents and identify trends in groundwater quality. The results of these tests provide information for water agencies to address a variety of water resource issues.

map of California shaded by GAMA shallow aquifer study units
June 18, 2019

n 2012, the Groundwater Ambient Monitoring & Assessment Priority Basin Project (GAMA-PBP) began water-quality assessments of shallow aquifers, which are typically used for private domestic and small system drinking-water supplies. GAMA-PBP is designed to identify where and to what extent water quality of groundwater aquifers meets benchmarks that have been established for drinking water.

maps of the 5 coastal drainage basins in San Diego County
May 16, 2019

Coastal Basins of San Diego County, California, and Northern Baja California, Mexico.  Local features include the San Dieguito River Basin, San Diego River Basin, Sweetwater River Basin, and Otay River Basin.  Maps also display locations of groundwater-monitoring sites. 

Screenshot of the Borrego Valley groundwater quality data map
January 30, 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 this interactive water-quality data map for detailed information and to download data.

screenshot of part of movie showing fault near Oakland and Berkeley
December 31, 2018

A geonarrative (Esri Story Map) describing what it might be like the next time the Hayward fault has a large earthquake. Scientists examined a hypothetical earthquake, the magnitude 7.0 HayWired earthquake scenario.

screenshot of interactive data map displaying  USGS wells in the San Antonio Creek groundwater basin
December 18, 2018

In order to understand the integrated hydrologic systems in the San Antonio Creek Valley, 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.

screenshot of interactive map displaying groundwater, water quality, streamgage, and microgravity sites
December 10, 2018

The Lower Colorado Monitoring Network is a series of groundwater-level and water-quality wells, as well as streamgages and micro-gravity sites. This interactive map displays the sites and provides links to the most current data.

Map of California with areas of subsidence shaded by cause
December 7, 2018

In California, land subsidence—mostly from groundwater pumping—was first documented by the USGS in the early 20th century. Completion of State and Federal water projects that bring water from California's wet north to its dry south allowed some groundwater aquifers to recover, and subsidence decreased in these areas. Subsidence continues today, sometimes at high rates of more than 1 foot/year.

screenshot of the user interface
November 13, 2018

This interactive webmap plots water-quality data from domestic and public-supply wells sampled by the USGS for the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project (GAMA-PBP), and allows users to download datasets. The GAMA-PBP is a cooperative program between the California State Water Resources Control Board and the U.S. Geological Survey. 

Filter Total Items: 416
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Year Published: 2020

Characteristics of frequent dynamic triggering of microearthquakes in Southern California

Dynamic triggering of earthquakes has been reported at various fault systems. The triggered earthquakes are thought to be caused either directly by dynamic stress changes due to the passing seismic waves, or indirectly by other nonlinear processes that are initiated by the passing waves. Distinguishing these physical mechanisms is difficult...

Fan, Wenyuan; Barbour, Andrew; Cochran, Elizabeth S.; Lin, Guoqing

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Year Published: 2020

Seismic attenuation monitoring of a critically stressed San Andreas fault

We show that seismic attenuation ( ) along the San Andreas fault (SAF) at Parkfield correlates with the occurrence of moderate‐to‐large earthquakes at local and regional distances. Earthquake‐related  anomalies are likely caused by changes in permeability from dilatant static stress changes, damage by strong shaking from local...

Malagnini, Luca; Parsons, Thomas E.

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Year Published: 2020

Distribution of aseismic deformation along the central San Andreas and Calaveras Faults from differencing repeat airborne lidar

Fault creep reduces seismic hazard and serves as a window into plate boundary processes; however, creep rates are typically constrained with sparse measurements. We use differential lidar topography (11–13 year time span) to measure a spatially dense surface deformation field along a 150 km section of the Central San Andreas and...

Scott, Chelsea P; DeLong, Stephen B.; Arrosmith, J Ramon

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Year Published: 2020

Localized fault-zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes

Earthquakes produce a spectrum of elastic and inelastic deformation processes that are reflected across various length and time scales. While elasticity has long dominated research assumptions in active tectonics, increasing interest has focused on the inelastic characteristics of earthquakes, particularly those of the surface fault rupture zone...

Barnhart, William D.; Gold, Ryan D.; Hollingsworth, James

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Year Published: 2020

Seismic reflection imaging of the low-angle Panamint normal fault system, eastern California

Shallowly dipping (<30°) low‐angle normal faults (LANFs) have been documented globally; however, examples of active LANFs in continental settings are limited. The western margin of the Panamint Range in eastern California is defined by a LANF that dips west beneath Panamint Valley and has evidence of Quaternary motion. In addition, high‐angle...

Gold, Ryan D.; Stephenson, William J.; Briggs, Richard W.; Duross, Christopher; Kirby, Eric; Woolery, Edward W; Delano, Jaime; Odum, Jackson K.

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Year Published: 2020

Developing post-alert messaging for ShakeAlert, the earthquake early warning system for the West Coast of the United States of America

As ShakeAlert, the earthquake early warning system for the West Coast of the U.S., begins its transition to operational public alerting, we explore how post-alert messaging might represent system performance. Planned post-alert messaging can provide timely, crucial information to both emergency managers and ShakeAlert operators as well as...

McBride, Sara; Bostrom, Ann; Sutton, Jeannette; deGroot, Robert Michael; Baltay, Annemarie S.; Terbush, Brian; Bodin, Paul; Dixon, Maximilian; Holland, Emily; Arba, Ryan; Laustsen, Paul C.; Liu, Sophia; Vinci, Margaret

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Year Published: 2020

Increasing threat of coastal groundwater hazards from sea-level rise in California

Projected sea-level rise will raise coastal water tables, resulting in groundwater hazards that threaten shallow infrastructure and coastal ecosystem resilience. Here we model a range of sea-level rise scenarios to assess the responses of water tables across the diverse topography and climates of the California coast. With 1 m of sea-level rise,...

Befus, K.M.; Barnard, Patrick L.; Hoover, Daniel J.; Finzi Hart, Juliette; Voss, Clifford I.

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Year Published: 2020

A stress-similarity triggering model for aftershocks of the MW6.4 and MW7.1 Ridgecrest earthquakes

The July 2019 Mw">Mw 6.4 and 7.1 Ridgecrest earthquakes triggered numerous aftershocks, including clusters of off‐fault aftershocks in an extensional stepover of the Garlock fault, near the town of Olancha, and near Panamint Valley. The locations of the off‐fault aftershocks are consistent with the stress‐similarity model of triggering,...

Hardebeck, Jeanne L.

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Year Published: 2020

Documentation of Surface Fault Rupture and Ground‐Deformation Features Produced by the 4 and 5 July 2019 Mw 6.4 and Mw 7.1 Ridgecrest Earthquake Sequence

The Mw">MwMw 6.4 and Mw">MwMw 7.1 Ridgecrest earthquake sequence occurred on 4 and 5 July 2019 within the eastern California shear zone of southern California. Both events produced extensive surface faulting and ground deformation within Indian Wells Valley and Searles Valley. In the weeks following the earthquakes, more...

Ponti, Daniel J.; Blair, James Luke; Rosa Carla M; Thomas, Kate; Pickering, Alexandra; Akciz, Sinan; Angster, Stephen J.; Avouac, Jean-Philipe; Bachhuber, Jeffrey; Bacon, Steven; Barth, Nicolas C.; Bennett, S.; Blake, Kelly; Bork, Stephan; Brooks, Benjamin A.; Bullard, Thomas; Burgess, Paul A.; Chupik, Colin; Dawson, Timothy E.; DeFrisco, Michael; Delano, Jaime E.; DeLong, Stephen B.; Dolan, James D.; Donnellan, Andrea; Duross, Christopher; Ericksen, Todd; Frost, Erik; Funning, Gareth J.; Gold, Ryan D.; Graehl, Nicholas A; Gutierrez, Carlos; Haddon, Elizabeth; Hatem, Alexandra Elise; Helms, John; Hernandez, Janis; Hitchcock, Christopher S.; Holland, Peter; Hudnut, Kenneth W.; Kendrick, Katherine; Koehler, Richard D; Kozaci, Ozgur; Ladinsky, Tyler C.; Leeper, Robert; Madugo, Christopher; Mareschal, Maxime; McDonald, James; McPhillips, Devin; Milliner, Christopher; Mongovin, Daniel; Morelan, Alexander; Nale, Stephanie; Nevitt, Johanna; O'Neal, Matt; Olsen, Brian J.; Oskin, Michael; Padilla, Salena; Patton, Jason; Philibosian, Belle; Pierce, Ian; Pridmore, Cynthia; Roth, Nathaniel; Sandwell, David ; Scharer, Katherine; Seitz, Gordon G.; Singleton, Drake; Smith-Konter, Bridget; Spangler, Eleanor; Swanson, Brian J.; Jobe, Jessica Thompson; Treiman, Jerome; Valencia, Francesca; Vanderwal, Joshua; Williams, Alana; Xu, Xiaohua; Zachariasen, Judith; Zimmerman, Jade; Zinke, Robert

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Year Published: 2020

Evidence of previous faulting along the 2019 Ridgecrest, California earthquake ruptures

The July 2019 Ridgecrest earthquake sequence in southeastern California was characterized as surprising because only ~35% of the rupture occurred on previously mapped faults. Employing more detailed inspection of pre-event high-resolution topography and imagery in combination with field observations, we document evidence of active faulting in the...

Thompson Jobe, Jessica; Philibosian, Belle; Chupik, Colin; Dawson, Timothy E.; Bennett, Scott E. K.; Gold, Ryan D.; Duross, Christopher; Ladinsky, Tyler C.; Kendrick, Katherine; Haddon, Elizabeth; Pierce, Ian; Swanson, Brian J.; Seitz, Gordon G.

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Year Published: 2020

Human behavioral response in the Ridgecrest earthquakes: Assessing immediate actions based on data from “Did You Feel It?”

Human behavioral response to earthquake ground motion has long been a subject of multidisciplinary interest and research. In most versions of seismic intensity scales, human perceptions and behavior are one component of the assignment of intensity. Public health research has shown that actions taken during earthquakes have a significant impact on...

Goltz, James D.; Park, Hyejeong; Quitoriano, Vince; Wald, David J.

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Year Published: 2020

The predictive skills of elastic Coulomb rate-and-state aftershock forecasts during the 2019 Ridgecrest, California, earthquake sequence

Operational earthquake forecasting protocols commonly use statistical models for their recognized ease of implementation and robustness in describing the short-term spatiotemporal patterns of triggered seismicity. However, recent advances on physics-based aftershock forecasting reveal comparable performance to the standard statistical counterparts...

Mancini, Simone; Segou, Margarita; Werner, Maximillian J; Parsons, Thomas E.

Filter Total Items: 1,121
A large wheel, bigger than a person, holds a long green hose wrapped around its drum.
February 4, 2021

GeoEel on winch

The GeoEel is a multichannel digital streamer system, with hydrophones in a long, green hose. The streamer is towed in the water from a vessel like a long snake, and the hydrophones "listen" for and record the signals from the seismic sound source. Here, it is shown stored on its winch in the wareyard of MarFac, the USGS Pacific Coastal and Marine Science Center's marine

...
person standing on step slope with debris flow deposits and burned trees in background
January 31, 2021

Eagle Rock, California Debris Flow

Rilling and a shallow landslide in CZU Fire near Eagle Rock, California. Soil ~3 cm below surface was almost completely dry after the rain storm, highlighting soil water repellancy.  

A woman wearing a mask, hard hat, personal floatation device, and waders stands near a river.
January 31, 2021

Sampling sediment following wildfires

In August of 2020, the enormous CZU wildfire complex consumed over 85,000 acres in San Mateo and Santa Cruz Counties, leaving scarred landscapes in the hilly region. Runoff from large rainstorms in the winter months carry contaminants from the soils within these burned-out forests. Forest fires and the fire retardants used to help control and extinguish them introduce

...
A woman wearing a hard hat, personal floatation device, and waders kneels near a river taking a sample of mud.
January 31, 2021

Sampling sediment following wildfires

In August of 2020, the enormous CZU wildfire complex consumed over 85,000 acres in San Mateo and Santa Cruz Counties, leaving scarred landscapes in the hilly region. Runoff from large rainstorms in the winter months carry contaminants from the soils within these burned-out forests. Forest fires and the fire retardants used to help control and extinguish them introduce

...
A woman wearing a hard hat, personal floatation device, and waders kneels near a river taking a sample of mud.
January 31, 2021

Sampling sediment following wildfires

In August of 2020, the enormous CZU wildfire complex consumed over 85,000 acres in San Mateo and Santa Cruz Counties, leaving scarred landscapes in the hilly region. Runoff from large rainstorms in the winter months carry contaminants from the soils within these burned-out forests. Forest fires and the fire retardants used to help control and extinguish them introduce

...
road on side of cliff above ocean showing part of road taken out by a landslide
January 29, 2021

Big Sur, California Landslide - January 26 and 28, 2021

The storm that hit California’s coast between Jan. 26 and 28, 2021, blew out a portion of Hwy 1 near Big Sur. On Saturday, a USGS reconnaissance flight snapped this dramatic photo above the Rat Creek drainage showing the debris flow.

Photo from the air looking at a coastal roadway with steep cliffs and waves breaking at the edge.
January 29, 2021

Highway 1 in Big Sur near Cruikshank Trail

California's Highway 1 snakes its way along the steep terrain of the Big Sur coast. The bridge over Villa Creek can be seen in the left of the photo, as well as a retaining wall built under the freeway towards the center. These are just a few of the engineering feats by Caltrans to keep the roadway intact. Because of the numerous, popular, picturesque vistas and views, the

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View from the sky looking down on a road that runs close to the ocean on a very steep and rocky cliff.
January 29, 2021

California Coastal Highway 1 in Big Sur south of Rat Creek

A section of Highway 1 along the California coast in Big Sur with more examples of the numerous debris flows and mudslides that occur following a heavy rain. This section is just south of the Rat Creek debris flow that completely washed out a large chunk of the highway.

View from the sky looking down on a road that runs close to the ocean along a steep and rocky cliff.
January 29, 2021

Big Sur coast just north of Kirk Creek

A two-day rainstorm from January 26-28, 2021 caused numerous mudslides, debris flows, and other issues along California's coastal Highway 1 through Big Sur. This section is just north of Kirk Creek, at a drainage where mud was washed across the roadway. Plumes of the muddy runoff are clearly visible in the ocean.

View from the sky looking straight down on a rocky coastline with steep cliffs and plumes of muddy water in the ocean water.
January 29, 2021

Drainage north of Kirk Creek

A two-day rainstorm from January 26-28, 2021 caused numerous mudslides, debris flows, and other issues along California's coastal Highway 1 through Big Sur. This section is just north of Kirk Creek, at a drainage where mud was washed across the roadway. Plumes of the muddy runoff are clearly visible in the ocean.

View from the sky looks down on a roadway that runs along a coastal cliff, part of the road has washed away.
January 29, 2021

Rat Creek washout on coastal highway

The atmospheric river, a narrow, powerful track of water vapor that can deliver tremendous volumes of rain, hit the central California coast and stalled there between January 26 and 28, 2021 — with catastrophic consequences. The area around Rat Creek, about 20 miles south of Big Sur's town center, 

...
View from the sky looking down on a road that runs close to the ocean on a steep and rocky cliff.
January 29, 2021

California Highway 1 north of Wild Cattle Creek

A two-day rainstorm from January 26-28, 2021 caused numerous mudslides, debris flows, and other issues along California's coastal Highway 1 through Big Sur. This section is just north of Wild Cattle Creek. Mud washed across the roadway from the cliffs in numerous locations along the 70+-mile stretch of this scenic coastal road. Note the heavy equipment along the closed

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Home damaged by post fire debris flow
February 25, 2021

Southern California can now expect to see post-wildfire landslides occurring almost every year, with major events expected roughly every ten years, a new study led by U.S. Geological Survey researchers finds.

TNMCorps Mapping Challenge: Schools in CA NV
February 25, 2021

Volunteers contibuted over 300 edits since this challenge was launched last week. This includes the removal of points that are either closed or the wrong feature type. Thank you for helping to update The National Map!

TNMCorps Mapping Challenge: FireStations in CA NV AZ FINISHED
February 18, 2021

This challenge is now complete! Thank you to everyone who contributed!

TNMCorps Mapping Challenge: Schools in CA NV NEW
February 18, 2021

TNMCorps Mapping Challenges continue on the Pacific coast with a new challenge for schools in California and Nevada!  This is an excellent challenge for Peer Reviewers and Advanced Editors since all the existing points have already been edited, but there are many points needing to be reviewed.  Don’t forget to look for missing schools too!

Longfin smelt captured in San Pablo Bay, November 2018.
February 17, 2021

USGS scientists have begun a project to estimate the marine distribution of longfin smelt (Spirinchus thaleichthys) along the North American Pacific coast.

topo map with shaded areas and lines following drainage channels
February 16, 2021

A new geonarrative (Esri Story Map) summarizes the debris flows that were caused by a rainstorm following the Bond Fire in California.

Kern County injection well
February 16, 2021

The USGS and State Water Board Oil and Gas Regional Groundwater Monitoring Program are hosting a webinar Friday, February 19 at 10am PT to discuss the scientific findings of the Groundwater Quality of Aquifers Overlying the Oxnard Oil Field, Ventura County, California study.

TNMCorps Mapping Challenge: FireStations in CA NV AZ
February 11, 2021

Volunteers continue to make progress on this challenge as more edits come in!

THUMBNAIL: Timelapse of City/Town Halls in CA & NV
February 11, 2021

Summary statistics are now available for this challenge. Thanks again to everyone who contributed!

A woman wearing a hard hat, personal floatation device, and waders kneels near a river taking a sample of mud.
February 8, 2021

In the lab, USGS scientists analyze sediment samples collected from stream banks to test for contaminants produced by wildfires. The toxic chemicals can be transported downstream by runoff following rainstorms in the burned regions.

An infographic summarizing activities of the RAMPS program.
February 4, 2021

Restoration Assessment and Monitoring Program for the Southwest (RAMPS)

A Program of the Southwest Biological Science Center & Ecosystems Mission Area

To subscribe to our newsletter, please visit: https://listserv.usgs.gov/mailman/listinfo/ramps

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