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: 517
Date published: January 1, 2016

Raw, high-resolution seismic-reflection data collected between Shelter Cove and Fort Bragg (northern California) during field activity B-5-10-NC from 09/20/2010 to 10/01/2010

This dataset includes raw, high-resolution seismic-reflection data jointly collected by the U.S. Geological Survey (USGS) and Oregon State University in 2010, between Shelter Cove and Fort Bragg in northern California.

Date published: January 1, 2016

Sediment Thickness--Point Conception to Hueneme Canyon, California

This part of DS 781 presents data for the sediment-thickness map of the Point Conception to Hueneme Canyon, California, region. The raster data file is included in "SedimentThickness_PointConceptionToHuenemeCanyon.zip," which is accessible from https://doi.org/10.5066/F7891424.

As part of the USGS's California State Waters Mapping Project,...

Date published: April 1, 2015

Data Release for the BOEM-USGS Study of the Regional Importance of Manmade Structures as Rockfish Nurseries in the Santa Barbara Channel

New GIS data available from multiple sources has been modified for the purpose of characterizing the seafloor for the Regional Importance of Manmade Structures as Rockfish Nurseries study. This release contains 5 data sets: 10-meter bathymetry contours, and air photo, lidar, sidescan sonar, and multibeam seafloor character zip files, each from 600kb - 4.3MB.

Date published: January 1, 2015

10 m depth contours-Santa Barbara Channel

This Data Release contains GIS data generated by USGS for use in a BOEM funded project to compare natural rockfish nursery habitat to habitat created by manmade structures in the eastern Santa Barbara Channel. The contours were created from published Data Elevation Models of Carignan and others (2009) and Dartnell and others (2012). Contours were generated using the ESRI Contour tool in s

Date published: January 1, 2015

Seafloor character from multibeam echo sounder data-Santa Barbara Channel

Substrate was classified using the method of (Cochrane 2008) for this study multibeam sonar. Sea floor character derived from multibeam sonar data is available for the mainland coast within the study area from the California State Waters Mapping Program (Johnson and others, 2012; Johnson and others, 2013a; Johnson and others, 2013b; Johnson and others, 2013c). The number of

Date published: January 1, 2015

Seafloor character from air-photo data-Santa Barbara Channel

Seafloor character was derived from interpretations of aerial photograph-derived kelp-distribution data available for Santa Cruz Island in the Santa Barbara Channel, California (Kushner and others 2013). The number of substrate classes was reduced because rugosity could not be derived for all areas.

Date published: January 1, 2015

Seafloor character from lidar data-Santa Barbara Channel

Seafloor character was derived from interpretations of lidar data available for the mainland coast within the study area from the California State Waters Mapping Program (Johnson and others, 2012; Johnson and others, 2013a; Johnson and others, 2013b; Johnson and others, 2013c). The number of substrate classes was reduced because rugosity could not be derived for all areas.

Date published: January 1, 2015

Seafloor character from sidescan sonar data-Santa Barbara Channel

Substrate was classified using the method of (Cochrane and Lafferty, 2002) for this study. Sea floor character derived from towed sidescan sonar data is available for the mainland coast within the study area from USGS online publications (Cochrane and others, 2003; Cochrane and others, 2005). The number of substrate classes was reduced because rugosity could not be derived for all

Date published: February 26, 2014

Soil Water Deficit Estimates (California Drought) for the Basin Characterization Model

Soil water deficit was calculated from soil moisture storage simulated for Jan. 1, 2014 for 23 water-supply basins surrounding the California Central Valley that drain to the Bay-Delta by using the monthly California Basin Characterization Model and ArcGIS. 

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

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

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......

Filter Total Items: 974
Computer simulation that shows water depth of a large bay, deeper water highlighted by darker colors.
May 18, 2015

Colored Shaded-Relief Bathymetry of San Francisco

 This colored shaded-relief bathymetry map of the Offshore of San Francisco map area in northern California was generated from bathymetry data collected by California State University, Monterey Bay (CSUMB) and by Fugro Pelagos (fig. 1). Most of the area was mapped by CSUMB in 2004, 2005, 2007, and 2008; a small offshore portion near the southern boundary of the map area

...
May 2, 2015

Mojave Golden Eagles

This short video features incredible and graphic images and video of golden eagle prey. These birds are eating machines. USGS biologist-rock climbers install nest cameras to study the eating habits of golden eagles and their young in the Mojave Desert. This work goes towards creating a Prey Availability Habitat Model to better site green energy projects so that they will

April 23, 2015

PubTalk 04/2015—"Fearfully Grand" Eruptions: Lassen Peak, CA, 1914-17

Title: A Sight "Fearfully Grand" Eruptions of Lassen Peak, California, 1914 to1917

  • A summary of the eruptions and their effects
  • Illustrated with historical photographs
Experimental laboratory setup to study uranium uptake by aquatic organisms
April 16, 2015

Experimental laboratory setup to study uranium uptake

Bio-Uptake Research Laboratory — Menlo Park, California. Experimental laboratory setup to study uranium uptake by aquatic organisms.

Earth As Art image of California's Mohave Desert
April 3, 2015

Contrails

Like scratches on a marble table, airplane contrails cut across the southern California Mojave Desert. The shadows from the contrails cast dark lines across the ground. Contrails form when cold, dry air mixes with warmer aircraft exhaust. Mountains and a few dry lakebeds provide a backdrop to this scene, along with bright green spots of agriculture along the Colorado River

...
Plot of earthquakes in Mount Shasta region greater than M1.0 from A...
April 3, 2015

Plot of quakes in Mount Shasta region greater M1.0 from 2010 to 2016

Plot of earthquakes in Mount Shasta region greater than M1.0 from April 3, 2010 to April 3, 2015.

March 26, 2015

PubTalk 3/2015 — The Environmental Legacy of California's Gold Rush

by Andrea Foster, USGS Research Geologist & Christopher Kim, Associate Professor, Chapman University

  • Why are arsenic and mercury associated with California's gold mines?
  • What types of arsenic and mercury contamination can be directly related to historic mining?
  • How are geochemists studying the distribution and
USGS Research Geologist uses a field meter to measure magnetic susceptibility of basalt flows in the Mojave Desert.
March 12, 2015

Measuring magnetic susceptibility in the field

Research Geologist Geoff Phelps measuring basalt flow thickness and magnetic susceptibility of individual basalt flows of the Broadwell Mesa Basalt in the central Mojave Desert near Ludlow, CA. 

Research geologist using satellite imagery on tablet computers to conduct geologic mapping on a mule pack train.
March 10, 2015

Digital mapping supported by mule team

Research Geologist Kevin Schmidt and Geoff Phelps examine satellite imagery on tablet computers during geologic mapping field work near Broadwell Mesa while supported by mule pack train.  

Tubes used for collecting groundwater samples protruding from a nested groundwater well
March 8, 2015

Groundwater Sampling

A groundwater well that is outfitted with equipment to collect samples to test for several water quality parameters.

USGS hydrologists collects a groundwater sample pumped through a hose into a bottle
March 2, 2015

Groundwater Sampling in Hinkley, CA

USGS hydrologist, Carmen Burton, collects a groundwater sample from a well in Hinkley, CA. The samples are being collected as part of a study analysing the occurrance of hexavalent chromium in groundwater. 

February 26, 2015

PubTalk 2/2015 — Undamming Washington's Elwha River

by Amy East USGS Research Geologist

  • Hear about river response to the largest dam removal in history.
  • Causing disturbance as a means of restoration: how well does it work?
  • Will legendary salmon runs return?
Filter Total Items: 932
USGS science for a changing world logo
July 28, 2009

The Salton Sea is California's largest lake. Its salinity is about 30% greater than the Pacific Ocean. Because of its location, the Salton Sea is critical to more than 400 species of migratory birds on the Pacific and Central flyways.
USGS public lecture on restoring California's "Inland Sea" -- the role of science in restoration of the unique Salton Sea environment.

USGS science for a changing world logo
July 24, 2009

For the first time in nearly 50 years, a population of a nearly extinct frog has been rediscovered in the San Bernardino National Forest's San Jacinto Wilderness.

USGS science for a changing world logo
July 10, 2009

Celebrating the 125th anniversary of its national topographic mapping program, the U.S. Geological Survey will showcase its latest high-resolution geospatial data and state-of-the-art mapping technology at the annual ESRI Users Conference in San Diego, California, July 13 – 17, at the San Diego Convention Center.

USGS science for a changing world logo
July 9, 2009

125th Anniversary of the USGS Topographic Mapping Program
In a bold, visionary statement to Congress on December 5, 1884, USGS Director, John Wesley Powell announced, "A Government cannot do any scientific work of more value to the people at large than by causing the construction of proper topographic maps of the country."

USGS science for a changing world logo
June 30, 2009

The sluggish recovery of the southern sea otter of California, a threatened population on the Endangered Species list, appears to have stalled once again. U.S. Geological Survey scientists say the latest 3-year average (2,813 sea otters) was 0.5 percent lower than last year, the first time the trend has been negative since the late 1990s.

USGS science for a changing world logo
June 4, 2009

Residents should not be alarmed to witness a low-flying airplane over parts of southeastern California covering the western edge of the Mojave National Preserve and extending toward Barstow starting around June 6.

USGS science for a changing world logo
May 14, 2009

Open House at the USGS Science Center in Menlo Park, California.
"USGS enthusiastically opens its doors this weekend to show its Bay Area neighbors the great science that we do," said Anne Kinsinger, USGS Western Region Director "It's an honor to welcome the State Geologist as we celebrate the many important partnerships that add vitality to our science."

USGS science for a changing world logo
May 13, 2009

Entertainment and education await visitors of all ages at the U.S. Geological Survey's (USGS) Menlo Park Science Center Open House on Saturday, May 16 and Sunday, May 17. Along with taking in science, visitors can relax and listen to live bands performing old-time bluegrass, folk, rock, pop, jazz, Native American, spiritual, Celtic, and French.

USGS science for a changing world logo
May 8, 2009

Gold-Panning to Earthquake Simulations...Satellite Imagery to Microfossils...Science for the whole Family
Entertainment and education await visitors of all ages at the U.S. Geological Survey's (USGS) Menlo Park Science Center Open House on Saturday, May 16 and Sunday, May 17. The Open House will be from 10:00 a.m. until 4:00 p.m. both days, and admission is free of charge.

USGS science for a changing world logo
May 1, 2009

Residents should not be alarmed to witness a low-flying airplane over parts of the northern California Coast and Mendocino National Forest starting around May 8.

USGS science for a changing world logo
May 1, 2009

Five-million dollars in grants and cooperative agreements are being awarded in 2009 for earthquake research to 84 recipients including universities, state geological surveys and private firms, the U.S. Geological Survey (USGS) announced today. In addition, applications are being accepted for up to $7 million in grants and cooperative agreements for earthquake research in 2010.

USGS science for a changing world logo
April 16, 2009

USGS at Pacific Climate Workshop
New studies about the timing and geographic distribution of terrestrial, marine, and atmospheric climate connections will be the focus of the 24th Pacific Climate Workshop (PACLIM). The conference will be held April 19-22, 2009 at the Asilomar Conference Grounds, Pacific Grove, California.