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: 577
Date published: April 21, 2015

California State Waters Map Series Data Catalog--Offshore of Pigeon Point

Each GIS data file for the Offshore Of Pigeon Point map area is listed with a brief description, a small image, and links to the metadata files and the downloadable data files. The data were compiled in ArcMap (version 10.2.2, ESRI, 2014). Raster data layers are registered TIFF images and are in the UTM Zone 10 coordinate system. Point, line, and polygon features are in shapefile format

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

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: 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 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

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: October 23, 2014

California State Waters Map Series Data Catalog--Salt Point to Drakes Bay Region

Each GIS data file for the Salt Point to Drakes Bay region is listed with a brief description, a small image, and links to the metadata files and the downloadable data files. The data were compiled in ArcMap. Raster data layers are registered TIFF images and are in the UTM Zone 10 coordinate system, with datum WGS84. Point, line, and polygon features are in shapefile format and are projected...

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

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...

Filter Total Items: 1,120
August 23, 2016

Golden Eagle Flight

Golden eagles can be killed by colliding with a number of human-made objects, including wind turbines. USGS research wildlife biologist Todd Katzner describes his studies of golden eagle flight. This research is being done to model flight behavior which might help managers understand how placement of wind turbines might pose significant risks to golden eagles.

 

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

...
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

...
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

...
Filter Total Items: 980
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.)

USGS science for a changing world logo
January 26, 2009

Sea-level rise, severe winter storms, salmon populations, carbon sequestration, invasive plants, and migratory birds are among the many issues of concern to natural resource managers that are affected by changing climate. Climate change and its impact on coastal ecosystems is the focus of a 2-day workshop that will bring together more than 450 scientists and policy-makers.

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.