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: 550
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: 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 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.

Date published: September 20, 2011

1:1,000,000-scale potentiometric contours and control points for the Great Basin carbonate and alluvial aquifer system of Nevada, Utah, and parts of adjacent states

This dataset consists of potentiometric contours, control points used to guide the creation of the contours, and a grid of 2 square-mile cells used to average the water-level value of selected control points. Control points are based on water-level measurements at well and spring locations from the USGS National Water Information System (NWIS).

Date published: September 20, 2011

Three-dimensional hydrogeologic framework 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 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: January 1, 2009

1:1,000,000-scale Hydrographic Areas of the Great Basin

This data set consists of hydrographic area and major flow system boundaries and polygons delineated at 1:1,000,000-scale for the Great Basin.

Date published: November 8, 2004

1:250,000-scale geology of the Dry Valley Hydrographic Area, Nevada and California

This dataset consists of digital geologic data for the Dry Valley Hydrographic area, Nevada and California. It was compiled from individual 1:250,000-scale geologic data for Washoe County, Nevada, 1:62,500-scale geologic data for the Chilcoot and Doyle 15' quadrangles in California and the results of field mapping within the study area in 2004. 

Filter Total Items: 1,121
Dead and living trees near a river
August 22, 2016

Defoliated nonnative tamarisk with native cottonwood trees

Nonnative tamarisk can form mixed stands with native trees, such as cottonwoods, and other nonnative trees, such as Russian olive. 

A mostly dead bush with one living branch
August 22, 2016

Tamarisk re-grows new leaves after tamarisk leaf beetle defoliation

Tamarisk can re-grow new leaves after being defoliated by the biocontrol agent tamarisk leaf beetle (Diorhabda spp.).

mostly dead bush re-sprouting after fire
August 22, 2016

Nonnative tamarisk is fire resistant

Nonnative tamarisk is resistant to wildfire, in part due to its abilty to resprout from the its roots.

Satellite image showing the spread of the Soberanes Fire
August 14, 2016

Landsat Shows Spread of Soberanes Fire

A wildfire near Soberanes Creek along the Pacific coast of California started July 22, 2016, and spread to over 86,000 acres one month later. Landsat images from July 13, July 29, and August 14 show the dramatic progression as active fire burns orange in the latter two scenes, and smoke appears as a blue haze.

Model of reservoirs underneath Long Valley Caldera...
August 8, 2016

Model of reservoirs underneath Long Valley Caldera

Main hydrothermal features of the new (2016) 3-D model of the subsurface at Long Valley Caldera. This schematic is based on a survey of the electrical properties of the earth (magnetotellurics) below. Arrows show subsurface water flow, with colors keyed to changing water temperature, from blue (cold) to red (hot). Purple arrows show an extinct hot water pathway. See 2016

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July 28, 2016

July Public Lecture — USGS CalVO: It's not just earthquake country!

Volcanic eruptions occur int he State about as frequently as the large San Andreas Fault Zone earthquakes. California's "watch list" volcanoes are dispersed throughout the State and future eruptions are inevitable—the likelihood of renewed volcanism is on the order of one in a few hundred to one in a few thousand annually.

With Margaret Mangan, Scientist-in-Charge,

July 27, 2016

Ivanpah Video Clip

The video shows smaller smoking objects (insects). Dark objects (birds) are flying above the tower. We are uncertain of the origin of dark trails following the birds. 
 

July 27, 2016

Ivanpah Video Clip

The video shows small smoking objects (insects) and a larger object (bird) as it begins to smoke when entering the solar flux. The turquoise window is the thermal camera view of this same event.

Satellite image showing logging effects
June 25, 2016

Landsat Monitors 1,800-Year-Old Redwoods

These Landsat images show logging’s influence around the dark green protected forests. Many of the small pink spots in the lower left corner and across the right side of the 1984 scene are logging sites revealed through Landsat 5’s Thematic Mapper sensor. In the 2016 Landsat 8 image, logging seems to have lessened overall, particularly as areas on the right side of the

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June 15, 2016

Running Rivers

What inspired a USGS geologist to study how dam removal changes rivers. Profile of Amy East.

Seafloor map with many different colors and shading to give a 3D effect and to display data with a color scheme.
June 10, 2016

Potential Marine Benthic Habitats of Monterey Canyon and Vicinity

The map on sheet 7 shows “potential” marine benthic habitats in the Monterey Canyon and Vicinity map area, representing a substrate type, geomorphology, seafloor process, or any other attribute that may provide a habitat for a specific species or assemblage of organisms. This map, which is based largely on seafloor geology, also integrates information displayed on several

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Glacier National Park
June 5, 2016

Glacier Bay National Park

View of Glacier Bay National Park from the air.

Filter Total Items: 973
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.
 

USGS science for a changing world logo
March 18, 2009

The U.S. Geological Survey (USGS) will award up to $7 million in grants and cooperative agreements for earthquake research in 2010.
Interested researchers can apply online at GRANTS.GOV under the funding opportunity number 10HQPA0001. Applications are due May 13, 2009.

USGS science for a changing world logo
February 18, 2009

A new report from the U.S. Geological Survey (USGS) shows that the impacts of ground-water pumping and of changes in land and water use on streamflow in the Carson River upstream of Lahontan Dam were too small to be measured or were masked by variations in annual precipitation.

USGS science for a changing world logo
February 6, 2009

A U.S. Geological Survey (USGS) webcam is providing live views of water crashing down San Pedro Creek in Santa Barbara County – a watershed that is at high risk of flooding or debris flows as heavy rains arrive in Southern California.
Much of the watershed was severely burned in the Gap fire of July 2008. 
 

USGS science for a changing world logo
January 27, 2009

New hazard maps that describe the probability of earthquake-induced liquefaction in Northern Santa Clara Valley are now available from the U.S Geological Survey (USGS.)