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Filter Total Items: 364
USGS
Date Published: December 14, 2018
Status: Completed

Modeling in support of development of biocriteria for wadeable California streams and rivers

The State Water Resources Control Board (SWRCB) of California has initiated a process to develop biological objectives for wadeable freshwater streams and rivers for the entire state.

Contacts: Larry Brown
Satellite image of Tidal Marsh Study Sites in San Francisco Bay-Delta Region, California.
Date Published: December 14, 2018
Status: Completed

Ecology of selected tidal wetlands of the San Francisco Estuary, California

The CALFED Science Program funded a multi-party effort that worked from 2003-2005 to collect field data at six wetland sites spanning the estuarine salinity gradient from the western Delta to the North Bay. The project sought to address the question of how tidal marsh restoration efforts through the bay and delta affect ecosystem processes at different scales.

Contacts: Larry Brown
San Antonio Creek Groundwater Basin
Date Published: December 14, 2018
Status: Active

San Antonio Creek Water Availability

Located in Santa Barbara County, California, the San Antonio Creek Groundwater Basin is a rural agricultural area that is reliant on local water supplies, predominantly groundwater. Because of the growth of irrigated agriculture in the area, water demands have increased significantly, taxing local groundwater supplies. Groundwater resources are also used to supply local inhabitants, as well as...

Contacts: Geoff Cromwell
continuous GPS mounted on a tripod, located in a field, with a solar panel in the background
Date Published: December 13, 2018
Status: Active

Continuous Global Positioning System (CGPS) Stations

Measurements of elevations, aquifer-system compaction, and water levels are used to improve our understanding of the processes responsible for land-surface elevation changes. Elevation or elevation-change measurements are fundamental to monitoring land subsidence, and have been measured by using continuous GPS (CGPS) measurements and campaign global positioning system (GPS) surveying. ...

Contacts: Michelle Sneed
A photo of San Francisco Bay
Date Published: December 11, 2018
Status: Completed

Suspended-Solids Concentrations in San Francisco Bay, California

Suspended solids are an important component of San Francisco Bay, California (USA) because they transport adsorbed toxic substances, provide habitat for benthic organisms, limit light availability and photosynthesis, and deposit in ports and waterways which require dredging. The U.S. Geological Survey has established a network of eight sites in San Francisco Bay at which suspended-solids...

Map of San Francisco Bay
Date Published: December 11, 2018
Status: Completed

San Francisco Bay Wetlands Priority Ecosystem Studies

The U.S. Fish & Wildlife Service's (USFWS) San Francisco Bay National Wildlife Refuge manages wildlife at a number of salt ponds that the Cargill Corporation currently operates for salt production. A number of these ponds probably will be purchased by the USFWS. With acquisition, the USFWS will be responsible for maintenance or restoration of thousands of hectares of wetlands, an extremely...

Line drawing of California showing wolverine habitat
Date Published: December 10, 2018
Status: Completed

Impact of Climate Change on Future Suitability of the Sierra Nevada for Wolverines

The endeavor to ensure a viable population of the threatened wolverine to the mountains of the requires the characterization of suitable habitat.

Multiple graphs showing water level, salinity, streamflow over 12 months
Date Published: December 10, 2018
Status: Completed

Sources of Fecal Indicator Bacteria and Nutrients to Malibu Lagoon and Near-Shore Ocean Water, Malibu, California

Malibu Lagoon and near-shore ocean water in Malibu, Calif. have concentrations of fecal indicator bacteria (FIB) that occasionally exceed public health standards for recreational water.

Contacts: John Izbicki
Map showing San Bernardino Valley Municipal Area
Date Published: December 10, 2018
Status: Completed

Source, distribution, and management of perchlorate in water from wells in the upper Santa Ana River basin, California

Perchlorate (ClO4-), a commercially produced oxidizer used in solid propellants, has contaminated public-supply wells in parts of the upper Santa Ana River basin. Both industrial and agricultural sources of perchlorate are present within the basin. 

Contacts: John Izbicki
Submerged hydrophone near bank of the San Joaquin River
Date Published: December 10, 2018
Status: Active

Surrogate Monitoring of Sediment Transport using Hydrophones along the San Joaquin River and Tributaries

Traditional methods for measuring coarse bedload sediment transport by discrete physical sampling tend to be labor intensive and expensive (Gray and others, 2010). As such, bedload samples often are collected too infrequently to capture the temporal variability inherent in transport rates, which can vary significantly, sometimes by a factor of ten or more, over time periods of...

3-D Geologic Map
Date Published: December 10, 2018
Status: Active

Geologic Mapping in the Southern Pacific Border and Sierras provinces, California

 

This project uses geologic and geophysical mapping to build an earth-science framework for scientific investigations that include assessments of critical resources, such as groundwater, and of hazards, such as those resulting from earthquakes, in California west of and including the Sierra Nevada and Cascade arc.  

 

Questions of particular...

All-American Canal winding through the Imperial Sand Dunes
Date Published: December 10, 2018
Status: Active

Forecasting Total Dissolved Solids Concentrations of Groundwater from the Lower Colorado Water Supply Project

The All-American Canal (AAC) in southern Imperial County, California, has historically been unlined, resulting in substantial losses to seepage. In 2006, the Imperial Irrigation District (IID), under a contract with the United States Bureau of Reclamation (Reclamation), initiated a project to build a concrete-lined canal parallel to 23 miles of the earthen AAC. Construction was completed in...

Filter Total Items: 344
USGS
January 1, 2019

This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

USGS
January 1, 2019

This data contains maximum model-derived significant wave height (in meters) for the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenar

USGS
January 1, 2019

This dataset consists of 65 magnetotelluric (MT) stations collected in 2015 near Mountain Pass, California. The U.S. Geological Survey acquired these data to create a regional conductivity model near the Mountain Pass mine. This work is in support of characterizing mineral deposits.

USGS
January 1, 2019

This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

USGS
January 1, 2019

Presented here is a point cloud produced by the U.S. Geological Survey (USGS) from historical U.S. Air Force vertical aerial imagery, covering the area of the Mud Creek landslide on California State Route 1 (SR1), Mud Creek, Big Sur, California. The point cloud is referenced to previously published lidar data and contains RGB information as well as XYZ. Point cloud coordinates are

Long thin colorful shape, a map of a strip of coastline whose colors correspond to varying offshore sediment thicknesses.
January 1, 2019

This part of DS 781 presents data for the sediment-thickness map of the Point Sur to Point Arguello, California, region. The raster data file is included in the “SedimentThickness_PointSurToPointArguello.zip,” which is accessible from https://doi.org/10.5066/P97CZ0T7.
As part of the USGS's California State Waters Mapping Project, a 50-m grid of sediment thick

USGS
January 1, 2019

This data contains maximum model-derived significant wave height (in meters) for the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenar

USGS
January 1, 2019

This dataset includes field data for fishes sampled using gill nets during daylight hours in the Northern Sacramento-San Joaquin Delta, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis. First posted - August 19, 2019 (available from author) Revised - December 18, 2019 (version 1.1)

USGS
January 1, 2019

This data contains maximum model-derived ocean currents (in meters per second) for the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scen

USGS
January 1, 2019

The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board and Bureau of Land Management compiled and analyzed data for mapping groundwater salinity in selected oil and gas fields in California. The data for the South Cuyama oil field includes well construction data, digitized borehole geophysical data, geochemical analyses of water samples fr

USGS
January 1, 2019

This data contains geographic extents of projected coastal flooding, low-lying vulnerable areas, and maximum/minimum flood potential (flood uncertainty) associated with the sea-level rise (SLR) and storm condition indicated.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-ind

USGS
January 1, 2019

Sediment cores were collected from San Pablo Bay, in the Sacramento-San Joaquin Delta in California by the U.S. Geological Survey Pacific Coastal and Marine Science Center (PCMSC) during multiple surveys from 2011 to 2012. The cores were analyzed for grain-size distributions at the PCMSC sediment lab.

Filter Total Items: 315
Publication Thumbnail
Year Published: 2014

Emergency assessment of post-fire debris-flow hazards for the 2013 Springs Fire, Ventura County, California

Wildfire can significantly alter the hydrologic response of a watershed to the extent that even modest rainstorms can produce dangerous flash floods and debris flows. In this report, empirical models are used to predict the probability and magnitude of debris-flow occurrence in response to a 10-year rainstorm for the 2013 Springs fire in Ventura...

Staley, Dennis M.
Emergency assessment of post-fire debris-flow hazards for the 2013 Springs Fire, Ventura County, California; 2014; OFR; 2014-1001; Staley, Dennis M.

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Year Published: 2014

Latest Quaternary paleoseismology and evidence of distributed dextral shear along the Mohawk Valley fault zone, northern Walker Lane, California

The dextral-slip Mohawk Valley fault zone (MVFZ) strikes northwestward along the eastern margin of the Sierra Nevada in the northern Walker Lane. Geodetic block modeling indicates that the MVFZ may accommodate ~3 mm/yr of regional dextral strain, implying that it is the highest slip-rate strike-slip fault in the region; however, only limited...

Gold, Ryan D.; Briggs, Richard W.; Personius, Stephen; Crone, Anthony J.; Mahan, Shannon A.; Angster, Stephen
Gold, R. D., R. W. Briggs, S. F. Personius, A. J. Crone, S. A. Mahan, and S. J. Angster (2014), Latest Quaternary paleoseismology and evidence of distributed dextral shear along the Mohawk Valley fault zone, northern Walker Lane, California, J. Geophys. Res. Solid Earth, 119, 5014–5032, doi:10.1002/2014JB010987.

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Year Published: 2014

Triggered aseismic slip adjacent to the 6 February 2013 Mw 8.0 Santa Cruz Islands megathrust earthquake

Aseismic or slow slip events have been observed in many subduction zones, but whether they affect the occurrence of earthquakes or result from stress changes caused by nearby events is unclear. In an area lacking direct geodetic observations, inferences can be made from seismological studies of co-seismic slip, associated stress changes and the...

Hayes, Gavin P.; Furlong, Kevin P.; Benz, Harley M.; Herman, Matthew W.
Triggered aseismic slip adjacent to the 6 February 2013 Mw 8.0 Santa Cruz Islands megathrust earthquake; 2014; Article; Journal; Earth and Planetary Science Letters; Hayes, Gavin P.; Furlong, Kevin P.; Benz, Harley M.; Herman, Matthew W.

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Year Published: 2013

Monitoring of adult Lost River and shortnose suckers in Clear Lake Reservoir, California, 2008–2010

Executive Summary In collaboration with the Bureau of Reclamation, the U.S. Geological Survey began a consistent monitoring program for endangered Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) in Clear Lake Reservoir, California, in the fall of 2004. The program was intended to develop a more complete...

Hewitt, David A.; Hayes, Brian S.

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Year Published: 2013

Borehole-explosion and air-gun data acquired in the 2011 Salton Seismic Imaging Project (SSIP), southern California: description of the survey

The Imperial and Coachella Valleys are being formed by active plate-tectonic processes. From the Imperial Valley southward into the Gulf of California, plate motions are rifting the continent apart. In the Coachella Valley, the plates are sliding past one another along the San Andreas and related faults (fig. 1). These processes build the stunning...

Rose, Elizabeth J.; Fuis, Gary S.; Stock, Joann M.; Hole, John A.; Kell, Annie M.; Kent, Graham; Driscoll, Neal W.; Goldman, Mark; Reusch, Angela M.; Han, Liang; Sickler, Robert R.; Catchings, Rufus D.; Rymer, Michael J.; Criley, Coyn J.; Scheirer, Daniel S.; Skinner, Steven M.; Slayday-Criley, Coye J.; Murphy, Janice M.; Jensen, Edward G.; McClearn, Robert; Ferguson, Alex J.; Butcher, Lesley A.; Gardner, Max A.; Emmons, Iain D.; Loughran, Caleb L.; Svitek, Joseph R.; Bastien, Patrick C.; Cotton, Joseph A.; Croker, David S.; Harding, Alistair J.; Babcock, Jeffrey M.; Harder, Steven H.; Rosa, Carla M.
Borehole-explosion and air-gun data acquired in the 2011 Salton Seismic Imaging Project (SSIP), southern California: description of the survey; 2013; OFR; 2013-1172; Rose, Elizabeth J.; Fuis, Gary S.; Stock, Joann M.; Hole, John A.; Kell, Annie M.; Kent, Graham; Driscoll, Neal W.; Goldman, Mark; Reusch, Angela M.; Han, Liang; Sickler, Robert R.; Catchings, Rufus D.; Rymer, Michael J.; Criley, Coyn J.; Scheirer, Daniel S.; Skinner, Steven M.; Slayday-Criley, Coye J.; Murphy, Janice M.; Jensen, Edward G.; McClearn, Robert; Ferguson, Alex J.; Butcher, Lesley A.; Gardner, Max A.; Emmons, Iain; Loughran, Caleb L.; Svitek, Joseph R.; Bastien, Patrick C.; Cotton, Joseph A.; Croker, David S.; Harding, Alistair J.; Babcock, Jeffrey M.; Harder, Steven H.; Rosa, Carla M.

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Year Published: 2013

Emergency assessment of post-fire debris-flow hazards for the 2013 Rim Fire, Stanislaus National Forest and Yosemite National Park, California

Wildfire can significantly alter the hydrologic response of a watershed to the extent that even modest rainstorms can produce dangerous flash floods and debris flows. In this report, empirical models are used to predict the probability and magnitude of debris-flow occurrence in response to a 10-year rainstorm for the 2013 Rim fire in Yosemite...

Staley, Dennis M.
Emergency assessment of post-fire debris-flow hazards for the 2013 Rim Fire, Stanislaus National Forest and Yosemite National Park, California; 2013; OFR; 2013-1260; Staley, Dennis M.

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Year Published: 2013

Emergency assessment of post-fire debris-flow hazards for the 2013 Powerhouse fire, southern California

Wildfire dramatically alters the hydrologic response of a watershed such that even modest rainstorms can produce dangerous flash floods and debris flows. Existing empirical models were used to predict the probability and magnitude of debris-flow occurrence in response to a 10-year recurrence interval rainstorm for the 2013 Powerhouse fire near...

Staley, Dennis M.; Smoczyk, Gregory M.; Reeves, Ryan R.
Emergency assessment of post-fire debris-flow hazards for the 2013 Powerhouse fire, southern California; 2013; OFR; 2013-1248; Staley, Dennis M.; Smoczyk, Gregory M.; Reeves, Ryan R.

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Year Published: 2013

Emergency assessment of post-fire debris-flow hazards for the 2013 Mountain fire, southern California

Wildfire dramatically alters the hydrologic response of a watershed such that even modest rainstorms can produce dangerous flash floods and debris flows. We use empirical models to predict the probability and magnitude of debris flow occurrence in response to a 10-year rainstorm for the 2013 Mountain fire near Palm Springs, California. Overall,...

Staley, Dennis M.; Gartner, Joseph E.; Smoczyk, Greg M.; Reeves, Ryan R.
Emergency assessment of post-fire debris-flow hazards for the 2013 Mountain fire, southern California; 2013; OFR; 2013-1249; Staley, Dennis M.; Gartner, Joseph E.; Smoczyk, Greg M.; Reeves, Ryan R.

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Year Published: 2013

Characterizing and estimating noise in InSAR and InSAR time series with MODIS

InSAR time series analysis is increasingly used to image subcentimeter displacement rates of the ground surface. The precision of InSAR observations is often affected by several noise sources, including spatially correlated noise from the turbulent atmosphere. Under ideal scenarios, InSAR time series techniques can substantially mitigate these...

Barnhart, William D.; Lohman, Rowena B.
Characterizing and estimating noise in InSAR and InSAR time series with MODIS; 2013; Article; Journal; Geochemistry, Geophysics, Geosystems; Barnhart, William D.; Lohman, Rowena B.

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Year Published: 2013

Runoff-generated debris flows: observations and modeling of surge initiation, magnitude, and frequency

Runoff during intense rainstorms plays a major role in generating debris flows in many alpine areas and burned steeplands. Yet compared to debris flow initiation from shallow landslides, the mechanics by which runoff generates a debris flow are less understood. To better understand debris flow initiation by surface water runoff, we monitored flow...

Kean, Jason W.; McCoy, Scott W.; Tucker, Gregory E.; Staley, Dennis M.; Coe, Jeffrey A.
Runoff-generated debris flows: observations and modeling of surge initiation, magnitude, and frequency; 2013; Article; Journal; Journal of Geophysical Research: Earth Surface; Kean, Jason W.; McCoy, Scott W.; Tucker, Gregory E.; Staley, Dennis M.; Coe, Jeffrey A.

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Year Published: 2013

Effects of stock use and backpackers on water quality in wilderness in Sequoia and Kings Canyon National Parks, USA

During 2010-2011, a study was conducted in Sequoia and Kings Canyon National Parks (SEKI) to evaluate the influence of pack animals (stock) and backpackers on water quality in wilderness lakes and streams. The study had three main components: (1) a synoptic survey of water quality in wilderness areas of the parks, (2) paired water-quality...

Clow, David W.; Forrester, Harrison; Miller, Benjamin; Roop, Heidi; Sickman, James O.; Ryu, Hodon; Santo Domingo, Jorge
Effects of stock use and backpackers on water quality in wilderness in Sequoia and Kings Canyon National Parks, USA; 2013; Article; Journal; Environmental Management; Clow, David W.; Forrester, Harrison; Miller, Benjamin; Roop, Heidi; Sickman, James O.; Ryu, Hodon; Santo Domingo, Jorge

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Year Published: 2013

Whole-body concentrations of elements in three fish species from offshore oil platforms and natural areas in the Southern California Bight, USA

There is concern that offshore oil platforms off Southern California may be contributing to environmental contaminants accumulated by marine fishes. To examine this possibility, 18 kelp bass (Paralabrax clathratus Girard, 1854), 80 kelp rockfish (Sebastes atrovirens Jordan and Gilbert, 1880), and 98 Pacific sanddab (Citharichthys sordidus Girard,...

Love, Milton S.; Saiki, Michael K.; May, Thomas W.; Yee, Julie L.
Whole-body concentrations of elements in three fish species from offshore oil platforms and natural areas in the Southern California Bight, USA; 2013; Article; Journal; Bulletin of Marine Science; Love, Milton S.; Saiki, Michael K.; May, Thomas W.; Yee, Julie L.

Filter Total Items: 1,150
A woman kneels in a grassy area while taking a mud sample from the ground and placing it in a bag.
June 19, 2019

Wildfire history in the mud

Marine geochemist Renee Takesue collects a sample of exposed mud in a marsh near Sonoma Creek, California. She will look here and in nearby San Pablo Bay for chemicals from the 2017 Nuns Wildfire that can harm wildlife. The stormy winter of 2018 may have transported these contaminants from the Sonoma Creek watershed into San Pablo Bay National Wildlife Refuge. This

...
Sample being analyzed in a sealed quartz cuvette on the Aqualog.
June 19, 2019

Samples being analyzed on the Aqualog spectrometer

Samples being analyzed in a sealed quartz cuvette on the Aqualog spectrophotometer

USGS scientist samples an ocean sediment core
June 19, 2019

Sediment Cores Reveal the History of the Pacific Ocean

USGS scientist Summer Praetorius collects samples from an ocean sediment core in the Pacific Ocean Paleoclimatology Lab at Menlo Park, CA. The sediment core is from Tanner Basin, located about 200 miles due west of San Diego in the eastern Pacific Ocean. This area is the southern-most extension of the California Current upwelling system, which brings cold nutrient-rich

...
Barnstead e-pure organic free water filtration system in Trace Metals Lab
June 19, 2019

Barnstead e-pure organic free water filtration system in Trace Metals

Barnstead e-pure organic free water filtration system in Trace Metals Lab

A boat carrying lots of equipment motors out of a yacht harbor, waters are calm, engines churn up the water at the stern.
June 11, 2019

R/V Parke Snavely departs for deployment

The USGS research vessel Parke Snavely heads out of the Vallejo Marina on June 11, 2019 to deploy instrument frames in Grizzly Bay for the ERO19 study.

A man wearing a straw hat checks the equipment mounted on a tripod frame.
June 10, 2019

Tripod preparation for ERO19

Lukas Winkler-Prins checks on the frame setup on June 10, 2019.  This tripod has an RBR CTD, an RBR bursting pressure sensor, an RBR optical backscatter sensor, a LISST-200X, an altimeter, and two Nortek ADVs + Seapoint optical backscatter sensors, which will reveal information about water temperature and salinity, wave height and period, total suspended sediment

...
May 30, 2019

PubTalk 5/2019 - Rodgers Creek Fault

Title: New Mapping of the Rodgers Creek Fault: It's longer and more complex than we thought

  • Remote sensing technology reveals surface traces of the fault covered by trees and buildings.
  • Greater fault length and linkages to neighboring faults make larger earthquakes possible. 
  • Fault complexity has implications for hazards from ground shaking
...
maps of the 5 coastal drainage basins in San Diego County
May 16, 2019

Coastal Drainage Basins, San Diego County, California

Coastal drainage basins and locations of realtime sites in San Diego County, California.  Local features include the San Dieguito River Basin, San Diego River Basin, Sweetwater River Basin, and Otay River Basin.

map of San Diego county depicting the area studied by the San Diego Hydrogeology project
May 16, 2019

San Diego Hydrogeology | Project Study Area

Location of the study area for the San Diego Hydrogeology project, and location of the major coastal river basins in San Diego County (San Dieguito River, San Diego River, Sweetwater River, Otay River, and Tijuana River).

Satellite view of a bay with islands, with markers plotted to show sample locations and instrument placement.
May 13, 2019

San Pablo Bay study area

The USGS Pacific and Coastal Marine Science Center collected data to investigate sediment dynamics in the shallows of San Pablo Bay in two deployments: February to March 2011 (ITX11) and May to June 2012 (ITX12). This data release includes time-series data and grain-size distributions from sediment grabs collected during the deployments. During each deployment, time series

...
Burned forest with plants growing between burned trees.
May 11, 2019

Hillside at Whiskeytown National Recreation Area 9 Months After Fire

Vegetation has begun to regrow in Whiskeytown National Recreation Area 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

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USGS
May 18, 2017

Members of the news media are invited to attend the next Earthquake Country Alliance - Bay Area Regional Workshop to be held at the U.S. Geological Survey in Menlo Park on May 23. ECA workshops are educational and informational opportunities to learn more about the latest in earthquake science, preparedness, and mitigation, as well as to arrange interviews with subject matter experts.

2014 South Napa Earthquake in California
May 15, 2017

Early on the morning of August 24, 2014, Loren Turner was awoken by clattering window blinds, a moving bed, and the sound of water splashing out of his backyard pool. He experienced what is now named the “South Napa Earthquake.” 

A radio-tracked adult desert tortoise basks in the sun among the wind turbines at a wind energy facility
May 3, 2017

How a wind energy facility is designed can influence the behavior of animal predators and their prey, according to a recent study published in The Journal of Wildlife Management by researchers at the University of California, Davis, and the U.S. Geological Survey.

Image shows a map of U.S. states colored based on the value of their mineral industry
April 14, 2017

In 2016, these five states led the pack in mineral production, accounting for about one third of the total mineral production value for the entire country.

BART
April 6, 2017

Although no one can reliably predict earthquakes, today’s technology is advanced enough to rapidly detect seismic waves as an earthquake begins, calculate the maximum expected shaking, and send alerts to surrounding areas before damage can occur. This technology is known as “earthquake early warning” (EEW).

Earthquake Early Warning: Vital for City Transit
April 6, 2017

The U.S. Geological Survey along with university, state and private-sector partners will highlight the rollout of Version 1.2 of the USGS ShakeAlert earthquake early warning system on April 10, 2017.

Field-trip guides to selected volcanoes and volcanic landscapes of ...
April 5, 2017

California is well-known for its frequent earthquakes, but less so for its volcanic history – despite the fact that the most recent eruption in the state occurred just 100 years ago.

CalVO geologists Duane Champion and Drew Downs collect paleomagneti...
April 3, 2017

New research on the ages of the most recent lava flows at Eagle Lake Volcanic Field, California suggest they are much older than once thought, minimizing the possibility of future eruption.

house perched at the top of cliff edge above beach.
March 27, 2017

Using a newly-developed computer model called “CoSMoS-COAST” (Coastal Storm Modeling System – Coastal One-line Assimilated Simulation Tool) scientists predict that with limited human intervention, 31 to 67 percent of Southern California beaches may become completely eroded (up to existing coastal infrastructure or sea-cliffs) by the year 2100 under scenarios of sea-level rise of one to two meters.

USGS
March 20, 2017

Seal Beach, Calif.— A new collaborative study shows evidence of prior abrupt sinking of the wetlands near Seal Beach, caused by ancient earthquakes that shook the area at least three times in the past 2,000 years, according to researchers.

A picture of a restored extensometer
March 16, 2017

San Joaquin Valley: the final frontier. These are the voyages of the U.S. Geological Survey. Its weeklong mission: to explore strange new locations, to seek out abandoned scientific technologies, to boldly go where no scientist has gone before (at least in a few decades).

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