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Filter Total Items: 362
Image: Tidal Marshland in the Plum Island Estuary, Massachusetts
Date Published: July 17, 2018
Status: Active

A tale of two coasts: tidal marsh persistence with changing climate and sea-level rise- Karen Thorne

The overall goal of this project is to improve our understanding of the combined effects of inundation, due to sea-level rise and storm surges, and other climate factor on tidal marsh physical and biological processes to provide guidance to natural resource managers to reduce these threats and increase resilience.

A Google Earth™ image showing the principal zone of faulting (in red) near the town of Healdsburg.
Date Published: July 16, 2018
Status: Completed

A New Map of Rodgers Creek Fault in Sonoma County, California

Release Date: JULY 16, 2018

A new more detailed and higher resolution map of the Rodgers Creek Fault in Sonoma County, California, has been produced using aerial photography and hillshade imagery derived from LiDAR data.

View from a dock near a calm bay with boats docked and one motoring slowly through the bay with a large outcrop in background.
Date Published: July 16, 2018
Status: Active

Offshore Faults along Central and Northern California

From Point Conception to Cape Mendocino, seafloor faults have been, in the past, mapped in varying ways and without enough detail to assess their earthquake potential. To provide this important information, USGS uses advanced technology to image offshore faults that could trigger devastating earthquakes near densely populated areas and a nuclear power plant.

Contacts: Janet Watt
A building after an earthquake has crumbled the roof and brick walls, the interior is now visible.
Date Published: July 12, 2018
Status: Active

U.S. West Coast and Alaska Marine Geohazards

Marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. Such underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis.

Devastating earthquakes in Japan (2011) and Chile (2010) that spawned pan-oceanic tsunamis sent a sobering reminder that U.S. coastlines are also vulnerable to natural disasters that originate in...

A picture of an airplane that sprays pesticides
Date Published: July 6, 2018
Status: Active

Pesticide Fate Research Group (PFRG)

Pesticides are applied in agricultural and urban areas to control weeds, insects, and other pests.  These chemicals can be transported off-site into streams and ground water where they partition between water and sediment and degrade over time.  Both the parent pesticides and the degradates can potentially cause adverse effects on aquatic organisms and human health.

Picture of coagulation treatment cells
Date Published: June 27, 2018
Status: Active

Low Intensity Chemical Dosing (LICD)

Rivers, wetlands, and agricultural operations supply natural organic material to the Sacramento-San Joaquin Delta (Delta) and the San Francisco Estuary. This natural organic matter provides many ecosystem benefits, but it also adversely affects drinking water. During drinking water treatment, chlorine added for purposes of pathogen control reacts with dissolved organic carbon (DOC) in the...

Contacts: Tamara Kraus, Phil Bachand
Informational graphic showing data in pie graphs, text, and maps
Date Published: June 19, 2018
Status: Active

California Water Use

The U.S. Geological Survey's National Water-Use Information Program compiles the nation's water-use data at the county, state, and national levels. USGS five-year reports on national and state water-use estimates between 1950-2015 are posted on the web at: http://water.usgs.gov/watuse/. USGS water-use data for states and counties for...

Contacts: Justin Brandt
Map shows the outline of a coastal area with a large bay inlet with two oval study areas demarcated in the north and south bay.
Date Published: June 14, 2018
Status: Active

Operational CoSMoS model: San Francisco Bay

The San Francisco Bay Coastal Flood Forecast pilot project is an operational CoSMoS model, part of a project funded by the California Department of Water Resources (CA-DWR) and NOAA’s Earth System Research Laboratory (ESRL).

The Two Towers landslide, looking upslope from the bottom.
Date Published: June 11, 2018
Status: Completed

Slow-Motion Landslides

Release Date: JUNE 11, 2018

Sluggishly-moving earthflows can help us learn what controls the starting and stopping of landslides.

A person looking across the valley using a laser scanning the entire Cleveland Corral landslide.
Date Published: June 7, 2018
Status: Active

U.S. Highway 50, California - Current Landslide Status

Status as of April 3, 2018

General

This slide moves in response to elevated ground-water pore pressures caused by infiltration from rainfall or melting snow. It typically moves during a wet winter and spring and is dormant during dry times. Continued downslope movement of this slide will likely occur in future wet seasons.

Displayed...

USGS
Date Published: June 7, 2018
Status: Active

U.S. Highway 50, California - Yearly Information

Yearly summaries of past precipitation, movement, and ground water pressures (for the water year beginning October 1). These can be viewed by opening each year's summary graph.

A monitoring station for rainfall in a basin of the Santa Monica Mountains
Date Published: June 7, 2018
Status: Active

2013 Springs Fire, Ventura County, California

Recent Conditions

A rain gage was installed in November 2015 and is used to monitor:

Data is updated every 60 minutes.

Contacts: Dennis Staley, Jason Kean, National Oceanic and Atmospheric Association
Filter Total Items: 315
USGS
January 1, 2017

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

USGS
January 1, 2017

Model-derived total water levels (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows project

USGS
January 1, 2017

Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows pr

USGS
January 1, 2017

This part of DS 781 presents data for bathymetry for several seafloor maps of the Offshore of Point Conception Map Area, California. The GeoTiff is included in "Bathymetry_OffshorePointConception.zip," which is accessible from https://doi.org/10.5066/F7QN64XQ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R., Hartwell, S.R., Golden, N.E., Kvitek, R.G

USGS
January 1, 2017

Maximum depth of flooding surface (in cm) in the region landward of the present day shoreline that is inundated for the storm condition and sea-level rise (SLR) scenario indicated. Note: Duration datasets may have occasional gaps in open-coast sections.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-in

USGS
January 1, 2017

Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows pr

USGS
January 1, 2017

This part of DS 781 presents 2-m-resolution data collected by Fugro Pelagos for the acoustic-backscatter map of the Offshore of Gaviota Map Area, California. The GeoTiff is included in "Backscatter_[Fugro]_OffshoreGaviota.zip," which is accessible from https://doi.org/10.5066/F7TH8JWJ. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Cochrane, G.R., Hartwell, S.R.,

USGS
January 1, 2017

Model-derived significant wave height (in meters) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows pr

USGS
January 1, 2017

This part of the data release presents acoustic backscatter data collected on February 1, 2011, in the Sacramento River from the confluence of the Feather River to Knights Landing. The data were collected by the USGS Pacific Coastal and Marine Science Center (PCMSC) team with collaboration and funding from the U.S. Army Corp of Engineers. This project used interferometric sidescan sonar to charac

USGS
January 1, 2017

Maximum depth of flooding surface (in cm) in the region landward of the present day shoreline that is inundated for the storm condition and sea-level rise (SLR) scenario indicated. Note: Duration datasets may have occasional gaps in open-coast sections.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-in

USGS
January 1, 2017

Projected Hazard: Geographic extent of projected coastal flooding, low-lying vulnerable areas, and maxium/minimum flood potential (flood uncertainty) associated with the sea-level rise and storm condition indicated.
Model Summary: The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding

USGS
January 1, 2017

This part of the data release presents a digital elevation model (DEM) created from bathymetry data collected on February 1, 2011, in the Sacramento River from the confluence of the Feather River to Knights Landing. The data were collected by the USGS Pacific Coastal and Marine Science Center (PCMSC) team with collaboration and funding from the U.S. Army Corps of Engineers. This project used inte

Filter Total Items: 312
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Year Published: 2006

Trophic structure and avian communities across a salinity gradient in evaporation ponds of the San Francisco Bay estuary

Commercial salt evaporation ponds comprise a large proportion of baylands adjacent to the San Francisco Bay, a highly urbanized estuary. In the past two centuries, more than 79% of the historic tidal wetlands in this estuary have been lost. Resource management agencies have acquired more than 10 000 ha of commercial salt ponds with plans...

Takekawa, John Y.; Miles, A.K.; Schoellhamer, D.H.; Athearn, N.D.; Saiki, M.K.; Duffy, W.D.; Kleinschmidt, S.; Shellenbarger, G.G.; Jannusch, C.A.

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Year Published: 2005

Decadal-scale analysis of coastal landslides along the Big Sur coast: rates and processes

Hapke, Cheryl J.; Green, Krystal R.
Decadal-scale analysis of coastal landslides along the Big Sur coast: rates and processes; 2005; OFR; 2005-1434; Hapke, Cheryl J.; Green, Krystal R.

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Year Published: 2005

Log of Trench 04A across the Hayward Fault at Tyson's Lagoon (Tule Pond), Fremont, Alameda County, California

This publication makes available a detailed trench log (sheets 1 and 2) of a 110-m trench we excavated in 2004 across a tectonic sag pond in the Hayward fault zone. Also included are revised stratigraphic unit descriptions from this fifth field season of subsurface investigation of the Hayward fault at Tyson's Lagoon (Tule Pond). Preliminary...

Lienkaemper, James J.; Williams, Patrick L.; Sickler, Robert R.; Fumal, Thomas E.
Log of Trench 04A Across the Hayward Fault at Tyson's Lagoon (Tule Pond), Fremont, Alameda County, California; 2005; OFR; 2005-1350; Lienkaemper, James J.; Williams, Patrick L.; Sickler, Robert R.; Fumal, Thomas E.

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Year Published: 2005

Rates of landsliding and cliff retreat along the Big Sur Coast, California--measuring a crucial baseline

Hapke, Cheryl J.; Green, Krystal R.
Rates of landsliding and cliff retreat along the Big Sur Coast, California--measuring a crucial baseline; 2005; FS; 2004-3099; Hapke, Cheryl J.; Green, Krystal R.

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Year Published: 2005

Blind comparisons of shear-wave velocities at closely-spaced sites in San Jose, California: Proceedings of a Workshop held at the US Geological Survey, Menlo Park, May 3, 2004

Shear-wave velocities within several hundred meters of Earth's surface are important in specifying earthquake ground motions for engineering design. Not only are the shearwave velocities used in classifying sites for use of modern building codes, but they are also used in site-specific studies of particularly significant structures. Many are the...

Asten, Michael W.; Boore, David M.
Blind comparisons of shear-wave velocities at closely-spaced sites in San Jose, California: Proceedings of a Workshop held at the US Geological Survey, Menlo Park, May 3, 2004; 2005; OFR; 2005-1169; edited by Asten, Michael W.; Boore, David M.

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Year Published: 2005

Elevated mercury concentrations in failed eggs of Snowy Plovers at Point Reyes National Seashore

[No abstract available]

Schwarzbach, S.E.; Stephenson, M.; Ruhlen, T.; Abbott, S.; Page, G.W.; Adams, D.
Elevated mercury concentrations in failed eggs of Snowy Plovers at Point Reyes National Seashore; 2005; Article; Journal; Marine Pollution Bulletin; Schwarzbach, S. E.; Stephenson, M.; Ruhlen, T.; Abbott, S.; Page, G. W.; Adams, D.

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Year Published: 2005

Habitat restoration as a means of controlling non-native fish in a Mojave desert Oasis

Non-native fish generally cause native fish decline, and once non-natives are established, control or elimination is usually problematic. Because non-native fish colonization has been greatest in anthropogenically altered habitats, restoring habitat similar to predisturbance conditions may offer a viable means of non-native fish control. In this...

Scoppettone, G.G.; Rissler, P.H.; Gourley, C.; Martinez, C.
Habitat restoration as a means of controlling non-native fish in a Mojave desert Oasis; 2005; Article; Journal; Restoration Ecology; Scoppettone, G. G.; Rissler, P. H.; Gourley, C.; Martinez, C.

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Year Published: 2005

Relation of desert pupfish abundance to selected environmental variables in natural and manmade habitats in the Salton Sea basin

We assessed the relation between abundance of desert pupfish, Cyprinodon macularius, and selected biological and physicochemical variables in natural and manmade habitats within the Salton Sea Basin. Field sampling in a natural tributary, Salt Creek, and three agricultural drains captured eight species including pupfish (1.1% of the total catch),...

Martin, B.A.; Saiki, M.K.
Relation of desert pupfish abundance to selected environmental variables in natural and manmade habitats in the Salton Sea basin; 2005; Article; Journal; Environmental Biology of Fishes; Martin, B. A.; Saiki, M. K.

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Year Published: 2005

The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California

Jarosite-group minerals accumulate in the form of stalactites and fine-grained mud on massive pyrite in the D drift of the Richmond mine, Iron Mountain, California. Water samples were collected by placing beakers under the dripping stalactites and by extracting pore water from the mud using a centrifuge. The water is rich in Fe3+ and SO4...

Jamieson, Heather E.; Robinson, Clare; Alpers, Charles N.; Nordstrom, D. Kirk; Poustovetov, Alexei; Lowers, Heather A.
The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California; 2005; Article; Journal; Canadian Mineralogist; Jamieson, H. E.; Robinson, C.; Alpers, C. N.; Nordstrom, D. K.; Poustovetov, A.; Lowers, H. A.

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Year Published: 2005

Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California

This study was conducted during September-October 2002 to verify preliminary findings of elevated total mercury concentrations in skinless fillets of sportfishes inhabiting Lake Natoma. Although we measured total mercury concentrations, most mercury in fish flesh occurs in the methylated form. In August 2000, other investigators collected a small...

Saiki, M.K.; Martin, B.A.; May, T.W.; Alpers, Charles N.
Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California; 2005; Article; Journal; California Fish and Game; Saiki, M. K.; Martin, B. A.; May, T. W.; Alpers, C. N.

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Year Published: 2004

Science support for salt pond restoration and management in south San Francisco Bay

Swanson, Kathleen M.; Shellenbarger, Gregory; Henderson, Kathleen D.; DiLeo, Jeanne S.; Schoellhamer, David H.
Science support for salt pond restoration and management in south San Francisco Bay; 2004; FS; 2004-3135; Swanson, Kathleen M.; Shellenbarger, Gregory G.; Henderson, Kathleen D.; DiLeo, Jeanne S.; Schoellhamer, David H.

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Year Published: 2004

Chapter E. The Loma Prieta, California, Earthquake of October 17, 1989 - Geologic setting and crustal structure

Although some scientists considered the Ms=7.1 Loma Prieta, Calif., earthquake of 1989 to be an anticipated event, some aspects of the earthquake were surprising. It occurred 17 km beneath the Santa Cruz Mountains along a left-stepping restraining bend in the San Andreas fault system. Rupture on the southwest-dipping fault plane consisted of...

Wells, Ray E.
Chapter E. The Loma Prieta, California, Earthquake of October 17, 1989 - Geologic Setting and Crustal Structure; 2004; PP; 1550-E; The Loma Prieta, California, Earthquake of October 17, 1989: Earthquake Occurrence; Edited by Wells, Ray E.

Filter Total Items: 1,137
USGS scientist collecting samples of aquatic species from the Pike River, Wis., for later analysis of mercury contamination.
December 31, 2017

Collecting samples of aquatic species from the Pike River, Wisconsin

Microbial Biogeochemistry Laboratory — Menlo Park, California. USGS scientist collecting samples of aquatic species from the Pike River, Wis., for later analysis of mercury contamination.

Topographic-change image produced by comparing 3D map derived from May 27 air photos with that derived from June 13 air photos
December 31, 2017

Topographic-change image produced by comparing subsequent 3D maps

Topographic-change image produced by comparing 3D map derived from May 27 air photos with that derived from June 13 air photos. Note that material has eroded from the seaward edge of the toe (yellow and orange tones), and material has built up on beaches to either side of the slide (blue tones).

Pilot Bob Van Wagenen and the Cessna 182R he flies when taking air photos for the USGS Remote Sensing Coastal Change Project
December 31, 2017

The pilot and plane used to take air photos for the USGS

Pilot Bob Van Wagenen and the Cessna 182R he flies when taking air photos for the USGS Remote Sensing Coastal Change Project.

man in yellow shirt and camo coveralls standing in thigh-high water with instrument.
December 31, 2017

Measuring streamflow in the Sisquoc River near Garey, California.

USGS technician measuring streamflow in the Sisquoc River near Garey, California, upstream of the Santa Maria Mesa Road Bridge.

erry Hatcher with the system he designed to record the precise time and geographic location of each air photo Van Wagenen shoots
December 31, 2017

Scientist with the system he designed to record precise photo data

Gerry Hatcher with the system he designed to record the precise time and geographic location of each air photo Van Wagenen shoots.

Map shows a coastal city with an airport and how, during a large storm, ocean water would flood around city features.
December 31, 2017

CoSMoS projection for San Diego

Example of CoSMoS projected flooding extents for a 1.5 meter sea level rise in combination with possible 100 year return period coastal storms.

scientific instruments and platform next to river surrounded by snow
December 31, 2017

USGS Streamgaging on the Pit River operates year round.

 USGS Streamgaging equipment and cableway on the Pit River near Canby, California operates year round.

Medicine Lake, California simplified hazards map showing potential ...
December 31, 2017

Medicine Lake, CA simplified hazards map

Medicine Lake, California simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.

Two technicians in a cablecar over a river, with an instrument hanging below them
December 31, 2017

Lowering an acoustic Doppler current profiler from a cable way.

USGS technicians preparing for a streamflow measurement by lowering an acoustic Doppler current profiler from a cable way on the American River near Fair Oaks, California. 

two men in camo-patterned overalls standing next to a boat on the shore of a river with an instrument on the ground.
December 31, 2017

Technicians prepare to board a boat to measure water flow.

USGS technicians prepare to board a boat to go out to the center of the channel in the San Joaquin River below Friant Dam to get an accurate measurement of water flow during releases from the Dam for flood control.

Big Sur coast. Red squares mark some of the sites damaged by 2016–17 winter storms, including Mud Creek and Paul’s Slide areas
December 31, 2017

Map of Big Sur coast with labels

Big Sur coast. Red squares mark some of the sites damaged by 2016–17 winter storms, including Mud Creek and Paul’s Slide areas.

Filter Total Items: 906
Lassen Volcanic National Park, California. Northeast side of Lassen Peak, showing the area devastated by mudflows and a lateral
May 19, 2015

2015 marks the centennial of the May 22, 1915 explosive eruption of Lassen Peak.

Flyer thumbnail
April 22, 2015

Everyone knows that California is “earthquake country,” but it is also “volcano country.” The most recent large volcanic eruption in California was 100 years ago at Lassen Peak, in what is now Lassen Volcanic National Park. California is much different today than it was 100 years ago; in 1915 there were no deaths, no injuries, and minimal economic losses due to the eruption.

USGS
April 14, 2015

The U.S. Geological Survey and Clear Channel Outdoor today announced a partnership to provide the public with critical earthquake safety information during April.

Image: Tsunami Evacuation Sign
April 13, 2015

Tens of thousands of people along the U.S. Pacific Northwest coastline may not have enough time to evacuate low-lying areas before tsunami waves arrive, according to a new publication by researchers at the U.S. Geological Survey, University of Colorado Boulder, and California State University, Sacramento.

Crowdsourced Earthquake Warnings illustration
April 10, 2015

MENLO PARK, Calif.— Smartphones and other personal electronic devices could, in regions where they are in widespread use, function as early warning systems for large earthquakes according to newly reported research.

Crowdsourced Earthquake Warnings illustration
April 10, 2015

MENLO PARK, California — Los teléfonos móviles y otros dispositivos electrónicos personales podrían ayudar en las regiones donde se encuentran en uso generalizado, y pueden funcionar como sistemas de alerta para terremotos mayor según la nueva investigación científica recien publicada.

Image: Female Golden Eagle with GPS-GSM Transmitter
April 8, 2015

Golden eagles in the Mojave Desert travel farther, to different areas, and at different times of the year than previously understood, according to research by the U.S. Geological Survey and partners from other federal agencies, academia and the private sector. 

Screenshot of the Upper Klamath Basin Collaborative Groundwater Monitoring website.
April 3, 2015

The U.S. Geological Survey recently launched the Upper Klamath Basin Collaborative Groundwater Monitoring  website to provide information on groundwater conditions in the upper Klamath Basin.

Plot of earthquakes in Mount Shasta region greater than M1.0 from A...
April 3, 2015

Since February 19, 2015 an ongoing series of small earthquakes has been occurring approximately 5 miles southeast of the summit of Mount Shasta, near the Clear Creek Trailhead on a regional, unnamed fault at about 3-5 miles depth.

Updated 2015 version of the El Capitan, California quadrangle with orthoimage turned off
April 1, 2015

Several of the 2,798 new US Topo quadrangles for California now display public trails along with segments of the Pacific Crest National Scenic Trail. Also the new maps now show improved data layers such as public land survey information, map symbol redesign, enhanced railroad information and new road source data.

Image: Happy Cows in Happy Flowers
March 25, 2015

Grassland habitats on rangelands in California’s Central Valley and surrounding foothills could decline by as much as 37 percent by 2100 due to changes in land use and climate, according to new scientific projections by the U.S. Geological Survey.

Image: San Jose Earthquakes' Avaya Stadium
March 20, 2015

Where better to install a new earthquake sensor than in the new home of the San Jose Earthquakes Major League Soccer team?