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Filter Total Items: 362
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...

Bridge over Santa Ana River
Date Published: December 7, 2018
Status: Completed

Pathogen Total Maximum Daily Loads Modeling in the Chino Basin

The Santa Ana River in Southern California is the primary water supply for approximately 2 million people. The main constituent of regulatory concern is pathogens that have impaired the use of waters for the beneficial uses of warm freshwater habitat and noncontact water recreation. Pathogen loadings from the tributary watershed flows into lakes and streams leading into the Santa Ana River....

Contacts: John Izbicki
Black & white photo of two USGS scientists conducting spirit leveling in the field
Date Published: December 7, 2018
Status: Active

Spirit Leveling

Elevation or elevation-change measurements are fundamental to monitoring land subsidence, and have been measured by using interferometric synthetic aperture radar (InSAR), continuous GPS (CGPS) measurements, campaign global positioning system (GPS) surveying, and spirit-leveling surveying. The most precise measurements tend to be made using spirit-leveling surveys and extensometers. 

...

Contacts: Michelle Sneed
Filter Total Items: 315
Map of a coastline with an outline drawn around a portion of the coast land to show where the study area is.
January 1, 2019

This data contains maximum depth of flooding (cm) in the region landward of the present-day shoreline 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) scenari

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) scenarios. Projections for CoSMo

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) scenarios. Projections for CoSMo

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-induced coastal flooding and er

USGS
January 1, 2019

Presented here is a point cloud collected by the U.S. Geological Survey (USGS) using an oblique plane-mounted camera system, covering the area of the Mud Creek landslide on California State Route 1 (SR1), Mud Creek, Big Sur, California. Point cloud is referenced to previously published lidar data and contains RGB information as well as XYZ. Point cloud coordinates are in NAD83 UTM Zone 10 meters.

Map of a coastline with an outline drawn around a portion of the coast land to show where the study area is.
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. Projections for CoSMoS v3.1 in Cen

Map of a coastline with an outline drawn around a portion of the coast land to show where the study area is.
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) scenarios. Projections for CoSMo

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. Projections for CoSMoS v3.1 in Cen

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) scenarios. Projections for CoSMo

USGS
January 1, 2019

This data set includes field data for fishes sampled using gill nets and otter trawls during daylight hours in and around Ryer Island, Suisun Bay, California. This data release includes all measured environmental parameters and fish taxa included in the analysis.

Map of a western coastline with stretches of the coast labeled to identify data set regions.
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-induced coastal flooding and er

USGS
January 1, 2019

Presented here is a point cloud collected by the U.S. Geological Survey (USGS) using an oblique plane-mounted camera system, 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 in NAD83 UTM Zone 10 met

Filter Total Items: 312
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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.

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Year Published: 2013

Infrequent triggering of tremor along the San Jacinto Fault near Anza, California

We examine the conditions necessary to trigger tremor along the San Jacinto fault (SJF) near Anza, California, where previous studies suggest triggered tremor occurs, but observations are sparse. We investigate the stress required to trigger tremor using continuous broadband seismograms from 11 stations located near Anza, California. We examine 44...

Wang, Tien-Huei; Cochran, Elizabeth S.; Agnew, Duncan Carr; Oglesby, David D.
Infrequent triggering of tremor along the San Jacinto Fault near Anza, California; 2013; Article; Journal; Bulletin of the Seismological Society of America; Wang, Tien-Huei ; Cochran, Elizabeth S.; Agnew, Duncan ; Oglesby, David D.

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Year Published: 2013

Age and condition of juvenile catostomids in Clear Lake Reservoir, California

Executive Summary Although infrequent recruitment of new individuals into the adult spawning populations of Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) limits recovery of these species in Upper Klamath Lake, it is not clear that populations are recruitment limited in Clear Lake Reservoir (hereafter Clear...

Burdick, Summer M.; Rasmussen, Josh

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Year Published: 2013

Geometry and earthquake potential of the shoreline fault, central California

The Shoreline fault is a vertical strike‐slip fault running along the coastline near San Luis Obispo, California. Much is unknown about the Shoreline fault, including its slip rate and the details of its geometry. Here, I study the geometry of the Shoreline fault at seismogenic depth, as well as the adjacent section of the offshore Hosgri fault,...

Hardebeck, Jeanne L.
Geometry and earthquake potential of the shoreline fault, central California; 2013; Article; Journal; Bulletin of the Seismological Society of America; Hardebeck, Jeanne L.

Filter Total Items: 1,137
Roadside landscape with newly grown grass and green trees.
May 11, 2019

Landscape 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.

...
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.

...
Hill with grass and shrubs and trees regrowing after fire.
May 11, 2019

Hill 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.

...
Field of growing spring grasses with hill in the background.
May 11, 2019

Landscape 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.

...
Overhead view of a brown pelican in flight over the ocean.
April 23, 2019

Brown pelican in flight

Zoomed in view of a California Brown Pelican (Pelecanus occidentalis californicus) from an image collected during a test flight in March 2019.

The Seabird Studies Team at the USGS Western Ecological Research Center is conducting aerial photographic surveys of the ocean off central and southern California to create comprehensive maps of seabird and marine

...
Pod of dolphins, viewed from high above the ocean.
April 23, 2019

Pod of dolphins captured during aerial photographic survey

Full size image of a pod of dolphins captured during an aerial photographic survey Fall 2018.

The Seabird Studies Team at the USGS Western Ecological Research Center is conducting aerial photographic surveys of the ocean off central and southern California to create comprehensive maps of seabird and marine mammal distributions.

 

April 18, 2019

PubTalk 04/2019 - California's Ecosystems

Title: The Story of California's Changing Ecosystems: As observed from space

  • How can we use images from space to help us understand changes to our coasts, rangelands, forests and wildlife habitats?
  • How can they help to predict future changes?
  • What more can we learn from advances in earth observing technologies?
April 15, 2019

Observing Sierra Nevada Mountain Snowpack 2000-2019 with Terra MODIS

The Moderate Resolution Imaging Spectroradiometer (MODIS) sensor is located aboard NASA’s Terra and Aqua satellites. These data are crucial for studying changes that have occurred on the surface of the Earth, including during times of drought.

This video uses images produced from Terra MODIS Surface Reflectance data over the Sierra Nevada Mountain Range to show

...
A dense field of wildflowers with coastal hills and the ocean in the background
April 6, 2019

Wildflowers in the Channel Islands

Spring wildflowers captured on California's Channel Islands.

The USGS Western Ecological Research Center's Dr. Kathryn McEachern studies plant ecology and restoration on the Channel Islands. Learn more here.

Rear-arc basalt lava outcrop
April 2, 2019

Rear-arc basalt lava outcrop

A 3-4m (10-12 ft) high outcrop of basalt lava, part of a broader lava flow. These flows were erupted about 300,000 years ago following basalt dike intrusions in a rear-arc region of northern California. The eruptions of three of these flows are thought to have taken place within several hundred years of each other.

March 28, 2019

PubTalk 3/2019 - Land Subsidence

Title: Land Subsidence: The Lowdown on the Draw-down

The link between groundwater use and sinking landscapes

  • What is land subsidence, where does it happen, and why does it matter?
  • How do weather and land use affect land subsidence in California?
  • Why are we optimistic about the future of land subsidence in California?
An enormous rock in the ocean viewed from above, with the coast behind and sunlight on the water.
March 22, 2019

Morro Bay from the air

Passing Morro Bay during an aerial photographic survey.

The Seabird Studies Team at the USGS Western Ecological Research Center is conducting aerial photographic surveys of the ocean off central and southern California to create comprehensive maps of seabird and marine mammal distributions.

Filter Total Items: 906
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).

Wes Hildreth at Long Valley Caldera...
March 15, 2017

Two new journal articles about California Volcanoes in the eastern part of the state, the Long Valley Caldera and Ubehebe Craters, are headed to press.

Lake Mead
March 15, 2017

The Colorado River system provides about 35 million Americans with a portion of their water supply. It irrigates 5½ million acres of land in the West and provides water to tribes, parks, and wildlife. The system serves parts of seven States and Mexico—but reservoir levels have crept lower over the past several years, sparking questions about how much water remains and who will have access.

Filter Total Items: 216