Unified Interior Regions

California

The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 580
Date published: January 1, 2014

CoSMoS Southern California projected flooding hazards

ZIP file (3.6 MB) contains three files when uncompressed: 

  • an essential readme.txt file and
  • model projections of two Southern California flooding hazard scenarios:
     - ARkStorm, and
     - January 2010 El Niño and Sea-Level Rise.

For more information, see ...

Date published: January 1, 2014

Transgressive Contours--Bolinas to Pescadero, California

This part of DS 781 presents data for the depth-to-transition map of the Bolinas to Pescadero, California, region. The raster data file is included in "TransgressiveContours_BolinasToPescadero.zip," which is accessible from https://pubs.usgs.gov/ds/781/BolinasToPescadero/data_catalog_BolinasToPe......

Date published: January 1, 2014

Isopachs--Bolinas to Pescadero, California

This part of DS 781 presents data for the isopachs for the Bolinas to Pescadero, California, region. The vector data file is included in "Isopachs_BolinastoPescadero.zip," which is accessible from https://pubs.usgs.gov/ds/781/BolinasToPescadero/data_catalog_BolinasToPe....

As part of the...

Date published: January 1, 2014

Seafloor character--Drakes Bay and Vicinity, California

This part of DS 781 presents the seafloor-character map of the Drakes Bay and Vicinity map area, California (raster data file is included in "SeafloorCharacter_DrakesBay.zip," which is accessible from https://pubs.usgs.gov/ds/781/DrakesBay/data_catalog_DrakesBay.html). These data accompany the pamphlet and map...

Date published: January 1, 2014

Depth to Transition--Bolinas to Pescadero, California

This part of DS 781 presents data for the depth-to-transition map of the Bolinas to Pescadero, California, region. The raster data file is included in "DepthToTransition_BolinastoPescadero.zip," which is accessible from https://pubs.usgs.gov/ds/781/BolinasToPescadero/data_catalog_BolinasToPe......

Date published: January 1, 2014

Sediment Thickness--Bolinas to Pescadero, California

This part of DS 781 presents data for the sediment-thickness map of the Bolinas to Pescadero, California, region. The raster data file is included in "SedimentThickness_BolinastoPescadero.zip," which is accessible from http://pubs.usgs.gov/ds/781/BolinastoPescadero/data_catalog_BolinastoPes......

Date published: January 1, 2014

Bathymetry--Drakes Bay and Vicinity, California

This part of DS 781 presents data for the bathymetry map of Drakes Bay and Vicinity map area, California. The raster data file for the bathymetry map is included in "Bathymetry_DrakesBay.zip," which is accessible from https://pubs.usgs.gov/ds/781/DrakesBay/data_catalog_DrakesBay.html. These data accompany the...

Date published: November 23, 2013

Land Treatment Digital Library (LTDL)

The Land Treatment Digital Library (LTDL) was created by the USGS to catalog legacy land treatment information on Bureau of Land Management lands in the western United States. The LTDL can be used by federal managers and scientists for compiling information for data-calls, producing maps, generating reports, and conducting analyses at varying spatial and temporal scales.

Date published: October 2, 2013

San Francisco Bay Basic Tide Model

This web page provides a link to files that may be used to run a basic depth-averaged (2DH) Deltares Delft3D version 4.00.01 astronomic tide model for San Francisco Bay. These files are provided ‘as is’ with the aim of promoting scientific advancement in the understanding of San Francisco Bay processes.

Date published: July 24, 2013

Data Entry Module for the Land Treatment Digital Library (LTDL)

This software allows agencies, organizations, and individuals to download an empty, stand-alone Land Treatment Digital Library database to individual or networked computers. Data entered in these databases may be submitted to the USGS for possible inclusion in the online Land Treatment Digital Library (https://ltdl.wr.usgs.gov).

Date published: September 20, 2011

1:1,000,000-scale estimated outer extent of areas of groundwater discharge as evapotranspiration for the Great Basin carbonate and alluvial aquifer system of Nevada, Utah, and parts of adjacent states

This dataset was created in support of a study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a complex aquifer system comprised of both unconsolidated and bedrock formations covering an area of approximately 110,000 square miles. The aquifer system is situated in the eastern portion of the Great Basin Province of the western...

Date published: September 20, 2011

1:1,000,000-scale hydrographic areas and flow systems for the Great Basin carbonate and alluvial aquifer system of Nevada, Utah, and parts of adjacent states

This dataset was created in support of a USGS study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a complex aquifer system comprised of both unconsolidated and bedrock formations covering an area of approximately 110,000 square miles. The aquifer system is situated in the eastern portion of the Great Basin Province.

Filter Total Items: 1,107
3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge
April 18, 2016

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge in California

April 12, 2016

Whats The Big Idea? — Pulling Water Out of Thin Air

Alicia Torregrosa, physical scientist with the USGS Western Geographic Science Center, explains how her work with coastal fog might one day help access new sources of water.

March 24, 2016

Marine Terraces of California: Landscapes from the Waves

  • Did you know soils on California’s marine terraces can be over a million years old? 
  • Have you wondered why California’s rugged shorelines are terraced?
  • Soils on marine terraces aid our understanding of soil formation, water movement, and carbon transformations under changing climate.
USGS scientist Jackson Currie navigates a personal water craft through waves, collecting bathymetric data in Monterey, CA
March 24, 2016

Collecting Bathymetric Data

Physical scientist Jackson Currie steers a personal water craft (PWC) equipped with GPS and echo sounder through the waves of the nearshore area of Zmudowski State Beach in Moss Landing, California. The data collected is used to generate bathymetric maps, or maps of what the nearshore environment looks like underwater. Gathering this type of information helps USGS

...
Scientist sample for suspended sediment by boat near the Golden Gate Bridge on a calm sunny day.
March 22, 2016

Measuring suspended sediment in San Francisco Bay

USGS researchers collect water samples from the Research Vessel Dorah Henry to measure suspended sediment concentration in Central San Francisco Bay. Samples were collected using a D-96 sampler that collects samples over the entire depth of the water column allowing for a  depth-integrated sample.

Image: Rockslide along Ferguson Highway 140, California
March 14, 2016

Rockslide along Ferguson Highway 140, California

2006 Rockslide on Ferguson-Hwy 140 in California along the Merced River about 8 miles west of El Portal and the entrance of Yosemite National Park.

Attribution: Natural Hazards
March 3, 2016

What's the Big Idea? Using Remote Sensing to Understand Climate Change

Zhuoting Wu, research ecologist at the USGS Western Geographic Science Center, explains how the USGS uses remote sensing technology to help Tribal communities better understand the effects of climate change. 

San Joaquin River trawling
March 2, 2016

San Joaquin River trawling aboard the USGS Research Vessel Munson II

Taking a break in the fog on the San Joaquin River while trawling aboard the USGS Research Vessel Munson II.

A photo of USGS biological science technician Desmond Mackell with a GPS-tagged male mallard.
February 23, 2016

USGS WERC Scientist with Male Mallard

A photo of USGS biological science technician Desmond Mackell holding a male mallard. USGS scientists based out of Dixon, CA are banding and marking mallards and other waterfowl with GPS transmitters as part of an ongoing study in the Suisun Marsh. 

Photograph taken from above the stern of the ship, with crew readying the streamer cable for a seismic survey.
February 22, 2016

Multichannel seismic streamer

A ship will tow this green cable, which contains underwater microphones that record sound reflected off layers beneath the seafloor. USGS scientists will use the data to pinpoint the location of faults.

USGS technician releases a male pintail as part of a study.
February 19, 2016

USGS WERC Scientist Releasing Tagged Male Pintail

A photo of USGS biological science technician releasing a male pintail in Suisun Marsh, CA. USGS Western Ecological Research Center scientists based out of Dixon, CA are marking and tagging waterfowl with GPS transmitters as part of an ongoing study.

Winter at Ward Creek, CA
February 2, 2016

Winter at Ward Creek, CA

Winter at Ward Creek, CA

Filter Total Items: 984
USGS science for a changing world logo
January 22, 2009

The latest climate-change science and how it can be used by natural resource agencies is the focus of a two-day workshop January 29-30 in San Francisco.

USGS science for a changing world logo
January 21, 2009

Tree death rates have more than doubled over the last few decades in old-growth forests of the western United States, and the most probable cause of the worrisome trend is regional warming, according to a U.S. Geological Survey-led (USGS) study published in Science on January 23.
The study found that the increase in dying trees has been pervasive. 

USGS
December 19, 2008

Now Planning for 2009 

Los Angeles - It's working! On November 13, 2008 more than 5.47 million people in southern California participated in The Great Southern California ShakeOut, now officially the largest earthquake drill in the Nation's history - and according to some community leaders, a success that should be practiced every year. 

USGS science for a changing world logo
December 18, 2008

Dr. Julio Betancourt, a U.S. Geological Survey senior scientist, was recently awarded a prestigious 2008 Presidential Rank Award. Betancourt, who has conducted groundbreaking research in how climate variability affects ecosystems, is also an adjunct professor at the University of Arizona, where he received his graduate degrees.

 

USGS
November 14, 2008

Earthquakes are far more than just geological phenomena-they can greatly alter the way people live by damaging whole communities.

USGS
November 12, 2008

New 3-D animations of the magnitude 7.8 earthquake scenario are now available to the public

USGS
November 10, 2008

You can now view video interviews, see earthquake animations and impacts, download high-resolution imagery and much more, all related to the USGS science behind the Great Southern California ShakeOut, all in one place:

USGS
November 6, 2008

A great earthquake along the southern San Andreas Fault could cause many tall buildings to collapse in Los Angeles, explains USGS earthquake expert Dr. Ken Hudnut in a new video interview.

USGS
October 29, 2008

The Indian Ocean tsunami that claimed a quarter million lives was not the first nor last of its kind, according to reports in the October 30 issue of the scientific journal Nature.

USGS
October 28, 2008

What if you knew that a magnitude 7.8 earthquake would happen in less than three weeks? In a new video interview, USGS earthquake scientist Dr. Lucy Jones explains that millions of Southern Californians will be preparing as if they do know, thanks to the Great Southern California ShakeOut.

USGS
October 21, 2008

Bay Area Schools, Businesses, Governments Practice Readiness for Next Big Quake

A special ceremony will be held at Mission San Jose on Tuesday, October 21st, to commemorate the moment a magnitude 7 earthquake struck on the Hayward Fault in 1868. This 140th Anniversary is especially significant since the last five major earthquakes on the Hayward Fault have occurred at approximately 140-year interva

USGS
October 21, 2008

Conference on Earthquake Hazards in the East San Francisco Bay Over 200 earthquake professionals are expected to attend this three day technical conference on earthquake hazard and risk in the East Bay. A full program including presentations, posters, and field trips is online.