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California

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Filter Total Items: 368
Map of Christ Church, NZ aftershocks
Date Published: April 19, 2014
Status: Active

Aftershock Forecast Communication for Risk Reduction

Studies of the communication of aftershock information during the Canterbury, New Zealand earthquake sequence conducted by Hazards Societal Consequences and Risk Communication team members and collaborators in New Zealand are...

Tsunami Scenario
Date Published: September 4, 2013

Tsunami Scenario

The SAFRR Tsunami Scenario is a hypothetical but plausible tsunami created by a magnitude 9.1 earthquake offshore of the Alaskan peninsula. The scenario report was released September 2013 and provides an analysis of the potential impacts along the California coast, intended for those who need to make mitigation, preparedness, and outreach decisions before and after tsunami impacts.

Tsunami Scenario Wave Height
Date Published: September 4, 2013
Status: Completed

SAFRR Tsunami Scenario

The third SAFRR scenario is initiated by a magnitude 9.0 megathrust earthquake in the eastern Aleutian Islands, an event presenting a hypothetical but plausible distant-tsunami threat to southern and central California. USGS and other federal and state agencies entities developed the SAFRR Tsunami Scenario. The scenario describes wave heights, current velocities and inundation for the coast of...

USGS
Date Published: August 8, 2013
Status: Completed

ARkStorm

The SAFRR project’s second scenario, called ARkStorm, addresses massive U.S. West Coast storms analogous to those that devastated California in 1861–62. Storms of this magnitude are projected to become more frequent and intense as a result of climate change. The SAFRR project assembled experts from scientific research agencies to design the large, but scientifically plausible, hypothetical...

red water flowing in a very rocky streambed
Date Published: May 24, 2013
Status: Active

Iron Mountain: An Extraordinary and Extreme Environment

At its peak production, Iron Mountain ranked as the tenth largest copper production site in the world, sixth in the U.S. and first in California. During its operation, from 1879 - 1963, ten different mines throughout the site's 4,400 acres were the source of not just copper, but also silver, iron, gold, zinc and pyrite (iron sulfide).

A century of active mining at Iron Mountain took an...

A screen shot of Delta Skelta serious game
Date Published: April 19, 2013
Status: Completed

Serious Games for Science

Serious or pedagogical games are an engaging way to educate decisionmakers and stakeholders about environmental challenges that are usefully informed by natural and social scientific information and knowledge. USGS designed two serious games intended to promote interactive learning and exploration in the face of large uncertainties, divergent values, and complex situations. Delta Skelta...

UAS discharge measurement Tanana River Train Bridge AK
Date Published: March 1, 2013
Status: Active

SWOT - Surface Water and Ocean Topography

Satellite altimetry associated with the Surface Water and Ocean Topography (SWOT) mission offers a solution for measuring (1) river stage and slope, (2) water surface area including mean channel width and (3) derivatives such as river discharge. The measurements can be used to track changes in these variables and provide an accounting of the Earth's fresh-water bodies from space at the reach...

Contacts: John W Fulton
map of the central valley with the CVHM grid cells overlaid, and a cross section of the subsurface
Date Published: August 27, 2012
Status: Active

Central Valley Hydrologic Model (CVHM)

In an effort to aid water managers in understanding how water moves through the aquifer system, predicting water-supply scenarios, and addressing issues related to water competition, the USGS developed a new hydrologic modeling tool, the Central Valley Hydrologic Model (CVHM). The CVHM is an extensive, detailed three-dimensional (3D) computer model of the hydrologic system of the Central...

Contacts: Claudia C Faunt
close-up Santa Ana Sucker
Date Published: September 28, 2011
Status: Completed

Native Fish Population and Habitat Study - Santa Ana River

California Water Science Center scientists further research on two native fish species.

Contacts: Larry Brown
Longfin Smelt
Date Published: September 28, 2011
Status: Completed

Exploring Drivers of Pelagic Fish Population Decline in Bay-Delta

USGS scientists develop spatially explicit ecosystem model to explore changes pelagic fish species population and distribution in the Sacramento-San Joaquin Delta and Suisun Bay.

Contacts: Larry Brown
USGS
Date Published: May 6, 2009
Status: Completed

Sources of Microbial Contamination at Public Beaches, Santa Barbara

The focus of this study is on analysis of existing hydrologic, chemical, and microbiological data; collection of surface-water and shallow ground-water hydrologic, chemical, and microbiological data; and characterization of dissolved organic carbon composition.

Contacts: John Izbicki
ShakeOut Don't Freak Out
Date Published: May 14, 2008
Status: Completed

ShakeOut

The ShakeOut Scenario was located in southern California where earthquake risk is high compared to the rest of the country. This scenario is a hypothetical, but plausible 7.8 magnitude earthquake on the southern San Andreas Fault. This scenario was completed in May 2008. The ShakeOut Scenario is described in two publications: The Scenario (Jones and others) and The Narrative (Perry and others...

Filter Total Items: 472
USGS
January 1, 2017

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

USGS
January 1, 2017

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

USGS
January 1, 2017

Model-derived ocean current velocities (in meters per second) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS

USGS
January 1, 2017

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

USGS
January 1, 2017

Model-derived ocean current velocities (in meters per second) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS

USGS
January 1, 2017

One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive ter

USGS
January 1, 2017

As part of the San Francisco Bay Marsh Sediment Experiments and hydrodynamic investigations in San Pablo Bay and China Camp Marsh, California, vegetation sampling measurements were taken over several periods at numerous locations. This portion of the data release presents physical characteristics and percent cover data from vegetation plots sampled in China Camp State Park salt marsh (north

USGS
January 1, 2017

To support Coastal Storm Modeling System (CoSMoS) in the San Francisco Bay (v2.1), time series of historical and 21st-century near-surface wind fields (eastward and northward wind arrays) were simulated throughout the Bay.
While global climate models (GCMs) provide useful projections of near-surface wind vectors into the 21st century, resolution is not sufficient enoug

USGS
January 1, 2017

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

USGS
January 1, 2017

Model-derived ocean current velocities (in meters per second) for the given storm condition and sea-level rise (SLR) scenario.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS

USGS
January 1, 2017

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

USGS
January 1, 2017

Files contain hydrodynamic and sediment transport data for the location and deployment indicated. Time-series data of water depth, velocity, turbidity, and temperature were collected in San Pablo Bay and China Camp Marsh as part of the San Francisco Bay Marsh Sediment Experiments. Several instruments were deployed in tidal creek, marsh, mudflat, and Bay locations, gathering data on

Filter Total Items: 1,171
January 31, 2017

What's Drifting Beneath Kauai's Ocean?

Residents and visitors both revel in Kauai’s lush landscape, and beneath its seascape. However, it’s underwater where things don’t look so healthy. Scientists from the U.S. Geological Survey put together a detailed picture of the physical environment of the coral reefs at Makua Beach. Understanding just what these reefs are exposed to and for how long, may help explain why

two men standing in a boat tied up to a dock
January 31, 2017

Readying a sonar-equipped boat for mapping

USGS scientists readying a sonar-equipped boat to map the ocean bottom near Santa Cruz, Calif.

person standing up riding a personal watercraft across small ocean swells, with buildings and a long pier in the background
January 31, 2017

Sonar-equipped personal watercraft mapping bathymetry.

A sonar-equipped personal watercraft mapping the bathymetry underwater near Santa Cruz, Calif.

man walking along wet sand on beach wearing a backpack with an antenna sticking pout of it
January 31, 2017

Mapping the beach with a GPS-equipped backpack unit.

USGS scientist Daniel Hoover mapping the beach at Santa Cruz with a GPS-equipped backpack unit.

January 31, 2017

Hatching an Engineer

What does it take to become an ocean engineer? Here is the path that USGS Gerry Hatcher took.
 

two young men standing on a pier with a large tripod, looking down at camera, and holding equipment.
January 31, 2017

Setting up a lidar scanner to map the beach.

 USGS scientists setting up a lidar scanner on the pier to map the beach near Capitola, California.

USGS scientist standing with a pole annotated with land-surface elevation marks at given years at bench mark H 1235 RESET.
January 31, 2017

Land Subsidence near El Nido, CA

National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys. The exact maximum subsidence location is unknown; however, this bench mark has some of the larger

...
USGS scientist standing with a pole annotated with land-surface elevation marks at given years at bench mark W 990.
January 31, 2017

Land Subsidence near El Nido, CA

National Geodetic Survey vertical control bench mark W990 CADWR in Merced County, California. W 990 CADWR is on the Mariposa Bypass Bridge on Washington Rd. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys. The exact maximum subsidence location is unknown; however, this bench mark has some of

...
Satellite image showing the flooding in California.
January 30, 2017

January Rain, Snow Refills California Reservoirs

A decade of drought in California has eased after the first month of 2017 thanks to heavy rains and snow, a fact that Landsat images are helping to confirm.

January 26, 2017

PubTalk 1/2017 — Unusual sources of tsunamis

A presentation on "Unusual Sources of Tsunamis From Krakatoa to Monterey Bay" by Eric Geist, USGS Research Geophysicist

- Not all tsunamis are generated by earthquakes.
- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances
- Data from tide gauges can help unravel the complex physics of these sources

Videographers:

January 20, 2017

Post-wildfire debris flow: 2016 Fish Fire, Las Lomas Canyon

The June 2016 Fish Fire burned over 12 km^2 in Los Angeles County, California. After the fire, the USGS installed an automated rain-triggered camera to monitor post-wildfire flooding and debris flow in a small canyon above the Las Lomas debris basin in Duarte. This video shows the peak flow triggered by an intense rainstorm on January 20, 2017.
 

delta waters with a significant amount of floating vegetation
January 16, 2017

Invasive Aquatic Vegetation, Sacramento-San Joaquin Delta

Invasive aquatic vegetation chokes Lindsey Slough, creating a potentially challenging environment for fish and other aquatic life. The slough is the site of a 2014 restoration project in the Sacramento-San Joaquin Delta to improve freshwater tidal marsh and spawning habitat for Delta smelt and other fish.

Filter Total Items: 918
USGS
August 16, 2012

MENLO PARK, Calif. — Residents should not be alarmed to witness a low-flying airplane over the northern Sacramento Valley and surrounding hills starting around August 17. 

USGS
August 15, 2012

MENLO PARK, Calif. —The U.S. Geological Survey is reducing its footprint in Menlo Park to lower rent costs. The move is part of a larger consolidation plan motivated by the Presidential directive to reduce government space utilization. There is not a plan to reduce staff, and the USGS will continue to maintain all operations currently housed in Menlo Park.

Taking GPS coordinates at the Amargosa Desert Research Site
July 24, 2012

Summer is the time when most CalVO scientists get out into the field to conduct geologic and ground-based monitoring investigations of our regional volcanoes.

USGS
July 23, 2012

Dr. Joseph Colgan, a research geologist with the U.S. Geological Survey, was named one of President Obama's recipients of the Presidential Early Career Award for Scientists and Engineers, the highest honor bestowed by the United States government on science and engineering professionals in the early stages of their independent research careers.

USGS
July 23, 2012

Dr. Karen Felzer, a geophysicist with the U.S. Geological Survey, was named one of President Obama's recipients of the Presidential Early Career Award for Scientists and Engineers, the highest honor bestowed by the United States government on science and engineering professionals in the early stages of their independent research careers. 

USGS
July 17, 2012

SAN DIEGO, Calif. — Nitrate was detected at high concentrations in one quarter of the aquifer system used for Inland Empire public water supply. Additionally, high concentrations of perchlorate were found in 11 percent of the aquifer system, and in moderate concentrations in 53 percent. This aquifer system includes the Upper Santa Ana Valley, San Jacinto, and Elsinore groundwater...

USGS
June 26, 2012

Tools, Resources for Earthquake Readiness and Emergency Management To Be Shared, Explained by U.S. Geological Survey Scientists at Conference at Caltech
 

USGS
June 26, 2012

MENLO PARK, Calif. —Throughout the United States, June is recognized as National Oceans Month.  This Thursday, the U.S. Geological Survey invites the public to a lecture entitled "Scanning the Seafloor with Sound." 

USGS
June 5, 2012

California, Louisiana and Mississippi join the more than 40 states covered by the US Topo
 

USGS
May 30, 2012

MENLO PARK, Calif. —May is American Wetlands Month. Hear how U.S. Geological Survey scientists are supporting the ongoing restoration efforts to improve South Bay wetlands for endangered species and migratory birds, as well as conducting studies to better understand this wetland ecosystem, and how adaptive management practices will be working over the coming decades to restore...

USGS
May 29, 2012

MENLO PARK, Calif. – 100 years ago, in June 1912, the largest volcanic eruption of the 20th century took place in what is now Alaska's Katmai National Park and Preserve. U.S. Geological Survey geologist Judy Fierstein, co-author of a new landmark study on this huge volcanic event, shares her work with the community in a free public lecture Wednesday, June 6, a century to the...

USGS
May 28, 2012

SANTA CRUZ, Calif. — The results of an innovative collaboration that paired artists from California’s central coast and the greater San Francisco Bay Area with scientists from the U.S. Geological Survey’s Pacific Coastal and Marine Science Center, will be on display at the R. Blitzer Gallery in Santa Cruz June 1 through July 7.