Unified Interior Regions

California

States L2 Landing Page Tabs

Filter Total Items: 362
Cache Creek Settling Basin area on aerial photo, showing sampling locations for baseline and storm-event water samlpling.
Date Published: December 14, 2018
Status: Completed

Determination of Mercury Loads for Cache Creek Settling Basin Inflow and Outflows and Related Investigations

Mercury (Hg), a legacy pollutant from mining of mercury deposits in the Coast Ranges as well as gold deposits in the Sierra Nevada, has contaminated surface waters throughout northern . Methylmercury (MeHg) is an organic form of Hg that bioaccumulates in food webs to elevated concentrations that threaten ecological health and human health through consumption of sport fish. 

Map of Hydrogeologic provinces of California and distribution of wells
Date Published: December 14, 2018
Status: Completed

Statistical Evaluation of Factors Affecting Occurrence of Organic Constituents from Fuels in Public-Supply Wells in Southern California

Biofuels, including ethanol, are expected to provide a greater contribution to the fuel supply in the United States. Research in the past decade has shown that ethanol in gasoline can cause plumes of benzene in groundwater to be larger than they would otherwise be.

Contacts: Matthew Landon
Map showing Fort Irwin National Training Center boundary, drainage basin boundaries, and areas of interest.
Date Published: December 14, 2018
Status: Active

Water-resources study of Fort Irwin National Training Center

The U.S. Army at Fort Irwin National Training Center (NTC) obtains all of its potable water supply from Irwin, Langford, and Bicycle Basins within the base boundaries. Groundwater pumping, since as early as 1941, has resulted in water-level declines in all of these basins and the disposal of treated wastewater in the Irwin Basin has resulted in elevated nitrate concentrations in some wells in...

Map of California showing Army Corps of Engineer sites
Date Published: December 14, 2018
Status: Completed

San Joaquin-Sacramento Basin Rain Flood Duration Skew Study

The U.S. Army Corps of Engineers (USACE) is conducting a hydrologic analysis of floodplain areas protected by the federal-state levee system within the San Joaquin-Sacramento drainage basins. 

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
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
Filter Total Items: 372
USGS
January 1, 2019

X-Ray diffraction (XRD) data for bulk sediment and clay separations taken from cores from Bristol Dry Lake, California and geothermal springs from Paoha Island (Mono Lake), California. The data were collected for two separate projects: (1) determining the source of lithium in Bristol Dry Lake (BDL), and (2) determining the mechanism of sinter formation on Paoha Islan

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

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

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-le

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

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) scenar

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 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

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

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 dataset includes water temperature and turbidity profiles collected in Don Pedro Reservoir, California, during 2015-2016.

USGS
January 1, 2019

This part of DS 781 presents data for the depth-to-transition map of the Punta Gorda to Point Arena, California, region. The raster data file is included in the "DepthToTransition_PuntaGordaToPointArena.zip," which is accessible from https://doi.org/10.5066/P9PNNI9H.
As part of the USGS's California State Waters Mapping Project, a 50-m grid of sediment thickness for the

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-le

Filter Total Items: 321
Publication Thumbnail
Year Published: 2014

Geodetic constraints on the 2014 M 6.0 South Napa earthquake

On 24 August 2014, the M 6.0 South Napa earthquake shook much of the San Francisco Bay area, leading to significant damage in the Napa Valley. The earthquake occurred in the vicinity of the West Napa fault (122.313° W, 38.22° N, 11.3 km), a mapped structure located between the Rodger’s Creek and Green Valley...

Barnhart, William D.; Murray, Jessica R.; Yun, S H; Svarc, Jerry L.; Samsonov, SV; Fielding, EJ; Brooks, Benjamin A.; Milillo, Pietro

Publication Thumbnail
Year Published: 2014

A VS30 map for California with geologic and topographic constraints

For many earthquake engineering applications, site response is estimated through empirical correlations with the time‐averaged shear‐wave velocity to 30 m depth (VS30). These applications therefore depend on the availability of either site‐specific VS30 measurements or VS30 maps at local, regional, and global scales....

Thompson, Eric; Wald, David J.; Worden, Charles
E. M. Thompson, D. J. Wald, and C. B. Worden (2014). A VS30 Map for California with Geologic and Topographic Constraints Bulletin of the Seismological Society of America 104, 2313-2321.

Publication Thumbnail
Year Published: 2014

Quantitative rock-fall hazard and risk assessment for Yosemite Valley, Yosemite National Park, California

Rock falls are common in Yosemite Valley, California, posing substantial hazard and risk to the approximately four million annual visitors to Yosemite National Park. Rock falls in Yosemite Valley over the past few decades have damaged structures and caused injuries within developed regions located on or adjacent to talus slopes highlighting the...

Stock, Greg M.; Luco, Nicolas; Collins, Brian D.; Harp, Edwin L.; Reichenbach, Paola; Frankel, Kurt L.
Quantitative rock-fall hazard and risk assessment for Yosemite Valley, Yosemite National Park, California; 2014; SIR; 2014-5129; Stock, Greg M.; Luco, Nicolas; Collins, Brian D.; Harp, Edwin L.; Reichenbach, Paola; Frankel, Kurt L.

Publication Thumbnail
Year Published: 2014

Sediment concentrations, flow conditions, and downstream evolution of two turbidity currents, Monterey Canyon, USA

The capacity of turbidity currents to carry sand and coarser sediment from shallow to deep regions in the submarine environment has attracted the attention of researchers from different disciplines. Yet not only are field measurements of oceanic turbidity currents a rare achievement, but also the data that have been collected consist mostly of...

Xu, Jingping; Octavio E. Sequeiros; Noble, Marlene A.
Xu, J.P., Sequeiros, O.E., Noble, M.A., 2014, Sediment concentrations, flow conditions, and downstream evolution of two turbidity currents, Monterey Canyon, USA: Deep Sea Research Part I: Oceanographic Research Papers, v. 89, pp. 11–34, doi: 10.1016/j.dsr.2014.04.001.

Publication Thumbnail
Year Published: 2014

Characterizing the primary material sources and dominant erosional processes for post-fire debris-flow initiation in a headwater basin using multi-temporal terrestrial laser scanning data

Wildfire dramatically alters the hydrologic response of a watershed such that even modest rainstorms can produce hazardous debris flows. Relative to shallow landslides, the primary sources of material and dominant erosional processes that contribute to post-fire debris-flow initiation are poorly constrained. Improving our understanding of how and...

Staley, Dennis M.; Waslewicz, Thad A.; Kean, Jason W.
Characterizing the primary material sources and dominant erosional processes for post-fire debris-flow initiation in a headwater basin using multi-temporal terrestrial laser scanning data; 2014; Article; Journal; Geomorphology; Staley, Dennis M.; Waslewicz, Thad A; Kean, Jason W.

Publication Thumbnail
Year Published: 2014

Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012

The primary purpose of this report is to provide drafted field logs of exploratory trenches excavated across the Berryessa Fault section of the northern Green Valley Fault (Lienkaemper, 2012; Lienkaemper and others, 2013) in 2011 and 2012 that show evidence for at least one surface-rupturing earthquake in the past few centuries. The site location...

Lienkaemper, James J.; Rosa, Carla M.; Cappelle, Ian J.; Wolf, Evan M.; Knepprath, Nichole E.; Piety, Lucille A.; Derouin, Sarah A.; Reidy, Liam M.; Redwine, Joanna L.; Sickler, Robert R.
Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012; 2014; OFR; 2014-1033; Lienkaemper, James J.; Rosa, Carla M.; Cappelle, Ian J.; Wolf, Evan M.; Knepprath, Nichole E.; Piety, Lucille A.; Derouin, Sarah A.; Reidy, Liam M.; Redwine, Joanna L.; Sickler, Robert R.

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.

Publication Thumbnail
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.

Publication Thumbnail
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.

Publication Thumbnail
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.

Publication Thumbnail
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.

Publication Thumbnail
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.

Filter Total Items: 1,163
Image shows a side view of a roadway with a large crack in it
July 4, 2019

Earthquake Damage on California Hwy. 178

California State Route 178, showing cracks due to fault offsets following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

Image shows a crack in the ground with a tape measure over it
July 4, 2019

Surface Rupture from Fault

On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.

Image shows a crack in the ground with a truck in the background
July 4, 2019

Surface Rupture from Fault

On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.

Mt. Diablo as seen from Twitchell Island
July 2, 2019

Mt. Diablo as seen from Twitchell Island

Mt. Diablo as seen from Twitchell Island

 Close-up of a wetland, showing multiple sources of DOM
July 2, 2019

Close-up of a wetland, showing multiple sources of DOM

 Close-up of a wetland, showing multiple sources of DOM

under a blue sky, golden grass, white rocks, and amber bushes fill a dried riverbed with rolling hills in the background
June 30, 2019

Vegetation Growth at a Once-Flooded Santa Ynez River

Vegetation grows abundantly on a once-flooded region of the Santa Ynez River. Located 5 ft adjacent from this picture is the actual flowing region of the stream. It is impressive to see the abrupt change in vegetation near stream environments.  Golden grasses, brick red brush, blue sky, and rocks coated white from sun-dried/sun-bleached algae where water used to sustain

...
June 27, 2019

PubTalk 06/2019 — USGS Fire Science

Title: USGS Fire Science: Understanding why wildlands burn and what can be done about it

  • Wildfires are expensive, dangerous, and have massive impacts on people and ecosystems, yet ecosystems evolved with wildland fire. 
  • USGS fire scientists help understand what factors affect wildland fire occurrence, intensity, spread, and effects. 
  • What can
at river's edge, a laptop displays graphs (foreground) while a hydrologist wades in the water with equipment (background)
June 26, 2019

Measuring Stream Discharge with Acoustic Doppler Current Profiler

The USGS maintains and monitors hundreds of streamgages across California, as well as across the Nation. Nearly all data collected by the USGS is made public and most in near real-time. Cities can use the data for flood mitigation and water supply. Understanding the amount of water flowing in the watersheds all across America is essential to everything we do, as water is

...
red and white round buoys strung across the blue water of the California Aqueduct
June 26, 2019

California Aqueduct, San Joaquin Valley

The California Aqueduct flowing near Huron, CA in the San Joaquin Valley.  This spot is near one of several USGS land subsidence monitoring stations in the San Joaquin Valley. Land subsidence has reduced the conveyance capacity of the Aqueduct and other water

...
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

...
Filter Total Items: 913
4D Photogrammetry of Mud Creek Landslide
June 15, 2017

USGS analysis of air photos collected June 13 shows that new land created by a May 20 landslide on California’s Big Sur coast is eroding. 

Cutout view of Mud Creek landslide area
June 1, 2017

USGS scientists analyzing before-and-after air photos have calculated the size of the May 20 landslide on California’s Big Sur coast, about 140 miles south of San Francisco. 

Mud Creek topographic point cloud Oblique Perspective
May 27, 2017

USGS is collecting and analyzing air photos to help monitor a huge landslide that occurred May 20 on California’s Big Sur coast.

An extremely rare Mojave River western pond turtle was recently observed in the Mojave Desert.
May 23, 2017

An extremely rare Mojave River western pond turtle was recently observed by U.S. Geological Survey scientists and staff from The Living Desert Zoo and Gardens in the Mojave Desert. Turtles of this population have rarely been seen since the late 1990s.

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.

Filter Total Items: 219