Unified Interior Regions

California

States L2 Landing Page Tabs

Filter Total Items: 364
A green and yellow USGS extensometer installed in a shed
Date Published: November 30, 2018
Status: Active

Extensometers and Compaction

Extensometers measure the compaction and expansion of the aquifer system, providing depth-specific data that can help CAWSC scientists better understand the rate, extent, and at what depths in the system subsidence is occurring. 

Contacts: Michelle Sneed
Province 5014 Los Angeles Basin National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Los Angeles Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of technically recoverable continuous petroleum resources of the Los Angeles Basin Province 5014:

Province 5012 Santa Maria Basin National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Santa Maria Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of the Santa Maria Basin Province 5012:

 

Province 5013 Ventura Basin National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Ventura Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered, technically recoverable conventional and continuous oil and gas resources of the Ventura Basin Province 5013:

Province 5011 Central Coastal National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Central Coastal Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of the Central Coastal Province 5011:

Province 5007 Northern Coastal National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Northern Coastal Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas resources of the Northern Coastal Province 5007:

 

Province 5008 Sonoma-Livermore Basin National Oil and Gas Assessments
Date Published: November 30, 2018
Status: Active

Sonoma-Livermore Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas resources of the Sonoma-Livermore Province 5008:

A massive earthquake swarm at Lo`ihi Seamount...
Date Published: November 29, 2018
Status: Active

Towards Near Surface Ground Motion Characterization in Oklahoma and Texas through Active- and Passive-Seismic Site Characterization- Alan Yong

Earthquakes, such as the 2011 M5.7 Prague, Oklahoma, and recent northern Texas M4 event, demonstrate the need for improved
understanding of site amplification and seismic hazards in the central United States. The intern will be trained by USGS scientists to use the state-of-the-art site investigation methods at seismic station sites in California before applying the methods in Oklahoma...

Water being released into a recharge pond, Yucca Valley, California
Date Published: November 28, 2018
Status: Active

Warren Subbasin Groundwater Recharge

The Hi Desert Water District (HDWD) provides water service to about 10,000 customers in the areas of Yucca Valley, Yucca Mesa, and some unincorporated areas of San Bernardino County. The study area is the 19 square mile Warren subbasin of the Morongo groundwater basin (approximately 100 miles east of Los Angeles, California).

Green pan used for gold mining with a small amount of mercury in it
Date Published: November 28, 2018
Status: Active

Mercury

Mercury is a rare, dense metal, slightly more common than gold in the earth's crust. Mercury occurs in several different forms, the most important of which is methylmercury. Methylmercury is the form most readily incorporated into biological tissues and most toxic to humans. Methylmercury accumulates and biomagnifies in the food chain, reaching highest concentrations in predatory fish such as...

Map of California showing locations where hydrologic models using MODFLOW
Date Published: November 28, 2018
Status: Completed

Estimating Groundwater Withdrawals and Consumptive Use for Principal Aquifers

The USGS works in cooperation with local, State, and Federal agencies to compile and disseminate data on the Nation's water use. The annual water-use estimates are reported at the county, State, and national levels and provide fundamental input to regional hydrologic models. These estimates commonly represent the largest stresses in most aquifers and are needed by local managers to steward the...

Diagram showing hypothesized changes in GHG emission pathways due to winter flooding of corn fields.
Date Published: November 28, 2018
Status: Completed

Assessing the role of winter flooding on baseline greenhouse gas fluxes from corn fields in the Sacramento – San Joaquin Bay Delta

Understanding the magnitude and variability of baseline greenhouse gas (GHG) emissions from the Sacramento – San Joaquin Bay Delta is critical for current and future land management. For example, strategies that maximize carbon sequestration in soils and plants while minimizing unintended consequences such as GHG emissions are likely to produce both economic and environmental benefits for the...

Contacts: Brian Pellerin
Filter Total Items: 344
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. Point cloud is referenced to previously published lidar data and contains RGB information as well as XYZ. Point cloud coordinates are in NAD83 UTM

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 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

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 folds of the Point Sur to Point Arguello, California, region. The vector data file is included in the “Folds_PointSurToPointArguello.zip,” which is accessible from https://doi.org/10.5066/P97CZ0T7.
Folds in the Point Sur to Point Arguello region are identified on seismic-reflection data based on warping and tilting of ref

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

RSS feed logo
December 21, 2018

USGS Project Alert Notices RSS feed includes response summaries of USGS streamgaging network activity during storm events in California. These Notices are produced by USGS Streamgaging Programs nationally and can be found on the USGS Current Floods Website.

line chart for continuous GPS site P304 in Mendota showing depth to water in feet and land subsidence in inches
December 19, 2018

Long-term groundwater-level data are fundamental to the resolution of problems dealing with groundwater availability and sustainability. Significant periods of time typically are required to collect water-level data needed to assess the effects of climate variability, to monitor the effects of regional aquifer development, or to obtain data sufficient for analysis of water-level trends.

line graph showing monthly runoff, in inches, for California for multiple years
December 19, 2018

Streams, rivers, lakes and reservoirs are important natural resources for irrigation, public supply, wetlands and wildlife.  Excess precipitation that flows into these sources is called runoff, and it's an important drought indicator.  The California Water Science Center tracks both monthly and annual runoff. 

screenshot of an interactive map of groundwater data in the Mojave region.  Well sites and water-level contours are displayed.
December 18, 2018

Interactive map of the Mojave and Morongo groundwater basins.  Data layers include sites and data for groundwater levels, water quality, and land subsidence.  Groundwater data spans 1992 to the present.

screenshot of the current streamflow conditions map, showing streamgage sites colored by percent to normal
December 18, 2018

Careful observation and analysis of the movement and condition of surface water is essential for understanding this resource, especially during times of drought. The California Water Science Center uses a network of more than 500 streamgages to collect real-time data on surface water at locations across the state.

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

In order to understand the integrated hydrologic systems in the San Antonio Creek Valley, many different types of data are being gathered from both the surface water and groundwater system. Learn about these data types and explore them with the interactive map.

Screenshot of the interactive Central Valley drought indicators map
December 17, 2018

During the recent droughts of 2007-2010 and 2012-2017, groundwater pumping has increased from the combined effects of the drought and land-use changes, re-initiating land subsidence. In order to document historical subsidence and monitor continued changes, the USGS has gathered and interpreted data from a variety of sources.

Filter Total Items: 315
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Year Published: 2012

Survival and migration route probabilities of juvenile Chinook salmon in the Sacramento-San Joaquin River Delta during the winter of 2009-10

Juvenile Chinook salmon (Oncorhynchus tshawytscha) emigrating from natal tributaries of the Sacramento River may use a number of migration routes to negotiate the Sacramento-San Joaquin River Delta (hereafter, "the Delta"), each of which may influence their probability of surviving. We applied a mark-recapture model to data from acoustically...

Perry, Russell W.; Romine, Jason G.; Brewer, Scott J.; LaCivita, Peter E.; Brostoff, William N.; Chapman, Eric D.

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Year Published: 2012

2011 Georgiana Slough non-physical barrier performance evaluation project report

The Sacramento River and its tributaries support populations of anadromous fish species including winter-run, spring-run, fall-run, and late fall–run Chinook salmon (Oncorhynchus tshawytscha); and steelhead (O. mykiss). Several of these species are listed as threatened or endangered under the California Endangered Species Act (CESA), federal...

Reeves, Ryan R.; McQuirk, Jacob; Ameri, Khalid; Perry, Russell W.; Romine, Jason G.; Liedtke, Theresa L.; Burau, Jon R.; Blake, Aaron R.; Fitzer, Chris; Smith, Natalie; Pagliughi, Steve; Johnston, Sam; Kumagai, Kevin; Cash, Kenneth

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Year Published: 2012

Objective definition of rainfall intensity-duration thresholds for the initiation of post-fire debris flows in southern California

Rainfall intensity–duration (ID) thresholds are commonly used to predict the temporal occurrence of debris flows and shallow landslides. Typically, thresholds are subjectively defined as the upper limit of peak rainstorm intensities that do not produce debris flows and landslides, or as the lower limit of peak rainstorm intensities that initiate...

Staley, Dennis; Kean, Jason W.; Cannon, Susan H.; Schmidt, Kevin M.; Laber, Jayme L.
Objective definition of rainfall intensity-duration thresholds for the initiation of post-fire debris flows in southern California; 2012; Article; Journal; Landslides; Dennis Staley; Jason W Kean; Susan H Cannon; Schmidt, Kevin M.; Laber, Jayme L.

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Year Published: 2012

On the reported ionospheric precursor of the Hector Mine, California earthquake

Using Global Positioning System (GPS) data from sites near the 16 Oct. 1999 Hector Mine, California earthquake, Pulinets et al. (2007) identified anomalous changes in the ionospheric total electron content (TEC) starting one week prior to the earthquake. Pulinets (2007) suggested that precursory phenomena of this type could be useful for...

Thomas, J.N.; Love, J.J.; Komjathy, A.; Verkhoglyadova, O.P.; Butala, M.; Rivera, N.
On the reported ionospheric precursor of the Hector Mine, California earthquake; 2012; Article; Journal; Geophysical Research Letters; Thomas, J. N.; Love, J. J.; Komjathy, A. ; Verkhoglyadova, O. P.; Butala, M. ; Rivera, N.

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Year Published: 2012

Effects of Iron Gate Dam discharge and other factors on the survival and migration of juvenile coho salmon in the lower Klamath River, northern California, 2006-09

Current management of the Klamath River includes prescribed minimum discharges intended partly to increase survival of juvenile coho salmon during their seaward migration in the spring. To determine if fish survival was related to river discharge, we estimated apparent survival and migration rates of yearling coho salmon in the Klamath River...

Beeman, John; Juhnke, Steven; Stutzer, Greg; Wright, Katrina
Effects of Iron Gate Dam discharge and other factors on the survival and migration of juvenile coho salmon in the lower Klamath River, northern California, 2006-09; 2012; OFR; 2012-1067; Beeman, John ; Juhnke, Steven ; Stutzer, Greg ; Wright, Katrina

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Year Published: 2012

On the reported ionospheric precursor of the 1999 Hector Mine, California earthquake

Using Global Positioning System (GPS) data from sites near the 16 Oct. 1999 Hector Mine, California earthquake, Pulinets et al. (2007) identified anomalous changes in the ionospheric total electron content (TEC) starting one week prior to the earthquake. Pulinets (2007) suggested that precursory phenomena of this type could be useful for...

Thomas, Jeremy N.; Love, Jeffrey J.; Komjathy, Attila; Verkhoglyadova, Olga P.; Butala, Mark; Rivera, Nicholas

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Year Published: 2012

Detection probability of an in-stream passive integrated transponder (PIT) tag detection system for juvenile salmonids in the Klamath River, northern California, 2011

A series of in-stream passive integrated transponder (PIT) detection antennas installed across the Klamath River in August 2010 were tested using tagged fish in the summer of 2011. Six pass-by antennas were constructed and anchored to the bottom of the Klamath River at a site between the Shasta and Scott Rivers. Two of the six antennas...

Beeman, John W.; Hayes, Brian; Wright, Katrina
Detection probability of an in-stream passive integrated transponder (PIT) tag detection system for juvenile salmonids in the Klamath River, northern California, 2011; 2012; OFR; 2012-1001; Beeman, John W.; Hayes, Brian ; Wright, Katrina

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Year Published: 2012

Simulated effects of dam removal on water temperatures along the Klamath River, Oregon and California, using 2010 Biological Opinion flow requirements

Computer model simulations were run to determine the effects of dam removal on water temperatures along the Klamath River, located in south-central Oregon and northern California, using flow requirements defined in the 2010 Biological Opinion of the National Marine Fisheries Service. A one-dimensional, daily averaged water temperature model (River...

Risley, John C.; Brewer, Scott J.; Perry, Russell W.
Simulated effects of dam removal on water temperatures along the Klamath River, Oregon and California, using 2010 Biological Opinion flow requirements; 2012; OFR; 2011-1311; Risley, John C.; Brewer, Scott J.; Perry, Russell W.

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Year Published: 2012

FOP 2012 stop, Honey Lake fault, Doyle, CA

The Honey Lake fault system (HLFS) strikes north-northwestward across Long Valley near Doyle, CA and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). Geologic investigations of a right-laterally offset terrace riser along the north bank of Long Valley Creek, which we refer to as site 1 (Figure 2),...

Seitz, Gordon G.; Gold, Ryan; Briggs, Richard W.; Crone, Anthony; Angster, Steve
FOP 2012 stop, Honey Lake fault, Doyle, CA; 2012; Article; Book; Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012 - Sept. 13-16: friends of the Pleistocene Pacific cell meeting; Gold, Ryan; Briggs, Richard ; Crone, Anthony ; Angster, Steve

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Year Published: 2012

Grizzly Valley fault system, Sierra Valley, CA

The Grizzly Valley fault system (GVFS) strikes northwestward across Sierra Valley, California and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). To investigate Quaternary motion across the GVFS, we analyzed high-resolution (0.25 m) airborne LiDAR data (Figure 2) in combination with six, high-...

Gold, Ryan; Stephenson, William; Odum, Jack; Briggs, Rich; Crone, Anthony; Angster, Steve
FOP 2012 stop, Grizzly Valley fault system, Sierra Valley, CA; 2012; Article; Book; Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012 - Sept. 13-16: friends of the Pleistocene Pacific cell meeting; Gold, Ryan; Stephenson, William ; Odum, Jack ; Briggs, Rich ; Crone, Anthony ; Angster, Steve

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Year Published: 2012

Probabilistic Relationships between Ground‐Motion Parameters and Modified Mercalli Intensity in California

We use a database of approximately 200,000 modified Mercalli intensity (MMI) observations of California earthquakes collected from USGS "Did You Feel It?" (DYFI) reports, along with a comparable number of peak ground-motion amplitudes from California seismic networks, to develop probabilistic relationships between MMI and peak ground velocity (PGV...

Worden, C.B.; Wald, David J.; Rhoades, D.A.
Probabilistic Relationships between Ground‐Motion Parameters and Modified Mercalli Intensity in California; 2012; Article; Journal; Bulletin of the Seismological Society of America; Worden, C.B.; Wald, David J.; Rhoades, D.A

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Year Published: 2011

Assessment of topographic and drainage network controls on debris-flow travel distance along the west coast of the United States

To better understand controls on debris-flow entrainment and travel distance, we examined topographic and drainage network characteristics of initiation locations in two separate debris-flow prone areas located 700 km apart along the west coast of the U.S. One area was located in northern California, the other in southern Oregon. In both areas,...

Coe, Jeffrey A.; Reid, Mark E.; Brien, Dainne L.; Michael, John A.
Assessment of topographic and drainage network controls on debris-flow travel distance along the west coast of the United States; 2011; Article; Journal; Italian Journal of Engineering Geology and Environment; 5th International Conference on Debris-Flow Hazards "Mitigation, Mechanics, Prediction and Assessment"; Coe, Jeffrey A.; Reid, Mark E.; Brien, Dainne L.; Michael, John A.

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Adaptive Management Forum
February 28, 2019

Adaptive Management Forum Brochure

Adaptive Management Forum Brochure.This conference was held at the University of California, Davis on February 5-6, 2019.

Rain clouds and red sky over the Northern Bristol Mountains in the Mojave Desert, California
February 14, 2019

Twilight in the Northern Bristol Mountains

Rain clouds at twilight over the Norhtern Bristol Mountains. THese types of winter storms provide water to the desert ecosystem, but are not usually intense enough to transport sediment or do other geomorphic work. This image was captured during geologic mapping of surficial geologic materials in order to better understand the Quaternary (younger than ~2.5 million years)

...
A pole has two shaded cameras mounted on it and they are pointing at a beach from high up on a grassy bluff.
December 31, 2018

Sunset State Beach webcams

USGS Pacific Coastal and Marine Science Center in Santa Cruz, California installed these video cameras which collect imagery every half hour for 10 minutes. The images are stored in the cloud and are used to study coastal variations through time, like wave, shoreline, and sandbar dynamics.

Brown landscape with volcano in the background
December 31, 2018

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern Ca

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ago. These are just two of the young volcanic areas monitored by the USGS California Volcano Observatory. USGS photo.

examples of fieldwork done in the Sacramento-San Joaquin River Delta
December 31, 2018

Fieldwork in California’s Sacramento-San Joaquin River Delta

Top row, left to right: Cordell Johnson (left) and Evan Dailey use the USGS R/V Fast Eddy to collect water samples. Cordell Johnson (left) and Jessie Lacy prepare to deploy a tripod holding instruments to measure water level, currents, and suspended sediment. USGS divers Jenny McKee (left) and Tim Elfers assemble the gear they will need to measure vegetation

...
city skyline at night with tall buildings and bridge in left foreground lit up
December 31, 2018

The Bay Bridge and the Oakland city skyline

The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground

Web browser screen showing an application with different parameters and controls on left and the resulting map on right.
December 31, 2018

Screenshot of Our Coast, Our Future

Screenshot of Our Coast, Our Future (OCOF) interactive map view of Stinson Beach, California, showing extent of flooding predicted if subjected to a sea-level rise of 100 centimeters (about 40 inches) and elevated water levels caused by a 100-year storm.

Juvenile salt marsh harvest mouse
December 31, 2018

Juvenile Salt Marsh Harvest Mouse (Reithrodontomys raviventris)

USGS wildlife biologists holding a juvenile salt marsh harvest mouse (Reithrodontomys raviventris). The species is listed as "endangered" under the Endangered Species Act of 1973.

Lineations on a vertical strand of the Soda-Avawatz Fault Zone exposed in Northern Soda Mountains, California.
December 17, 2018

Lineations on a strand of the Soda-Avawatz Fault Zone northern Soda Mt

Lineations on a vertical fault strand of the Soda-Avawatz Fault Zone, exposed in the northern Soda Mountains, Mojave Desert, southern California. The fault can be seen cutting both late Tertiary sand and gravel units, but is buried by an overlying mid-Pleistocene alluvial gravel deposit.

December 17, 2018

Burrowing Owl Regurgitating a Pellet

A burrowing owl regurgitates an owl pellet at the LAX Dunes Preserve caught by a wildlife camera.
 

November 29, 2018

PubTalk 11/2018 - California Birds

Title: The Least Bell's Vireo - A flagship species for riparian ecosystem conservation

The Least Bell's Vireo (Vireo bellii pusillus) is a songbird that is endangered in California:

  • What type of research is the USGS doing to help understand the threats these and other birds face?
  • How has our research during the last 30 years
...
Researcher in Mojave Desert
November 29, 2018

Researcher in Mojave Desert

One of 1,695 repeat photographs taken to provide context for the classification of the Central Mojave Desert into various vegetation classes.

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Photo of a young girl drinking water, which likely originated from groundwater sources. 
January 19, 2017

A regional assessment of untreated groundwater in the Basin and Range basin-fill aquifers, which include parts of Nevada, California, Arizona, Utah and adjacent states, is now available from the U.S. Geological Survey.

Man in orange safety suit and helmet, and thumb up,  standing while riding a personal watercraft
January 12, 2017

On January 13, scientists from the U.S. Geological Survey will be working on the beach in Santa Cruz at the mouth of the San Lorenzo River. Using a sonar-equipped boat and personal watercraft, they will be surveying the beach and the nearby ocean bottom to compile a three-dimensional map of how the beach changed during storms that struck this week.

USGS: Science for a changing world
January 10, 2017

The U.S. Geological Survey’s California Water Science Center is hosting a media event Wednesday, Jan. 11 at a USGS streamgage location about 7 miles north of Santa Cruz, California. A hydrologist will be available for interviews as field crews collect streamflow data.

 

Image: USGS Logo
January 8, 2017

The U.S. Geological Survey’s California Water Science Center is hosting a media event Monday, Jan. 9 at a USGS streamgage location below Friant Dam, a streamflow site with significance to the San Juan River Restoration Project.

A man sits at a desk in front of a computer monitor and keyboard, pointing to the image and talking.
December 30, 2016

USGS scientists and their coauthors from the California Coastal Records Project have found a way to use historical aerial photographs not just to see evidence of coastal erosion, but to accurately measure how much has occurred over time.

Nevada Earthquake Swarm December 28, 2016...
December 28, 2016

Three jolting earthquakes occurred in the wee hours this morning near Hawthorne NV, with two M5.7 events and a M5.5 occurring between the hours of 12:18 AM PST and 1:13 AM PST.

December 13 - 14, 2016 Long Valley Caldera earthquake swarm recorde...
December 14, 2016

A short-lived earthquake swarm occurred overnight under the Long Valley Caldera in eastern California about 4 km (2.5 mi) ESE of the town of Mammoths Lakes. The swarm does not appear to be related to increased volcanic unrest.

Image: AGU Fall Meeting Street Pedestrians
December 8, 2016

Their days often start with breakfast meetings and end with working dinners. They give presentations to hundreds of their peers, debate fine points in crowded poster halls, and catch up with colleagues in long refreshment lines.

still waters reflecting image of grasses growing next to it, with bright blue sky.
November 15, 2016

Successfully resolving California’s long-standing water supply and ecosystem restoration conflicts in the Delta requires developing sound policy solutions based on data derived from the best available science.

still waters reflecting image of grasses growing next to it, with bright blue sky.
November 9, 2016

Scientists, engineers and resource managers meet in Sacramento to explore the theme of “Science for Solutions: Linking Data and Decisions” at the 9th Biennial Bay-Delta Science Conference.

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