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.

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Diagram showing the relation between surface and subsurface processes with linkage to land subsidence.
December 31, 2014

Landscape and Subsurface After Land Subsidence (MODFLOW-OWHM)

Post-subsidence diagram showing the relation between surface and subsurface processes with linkage to land subsidence. The linkages to subsidence deformation are briefly summarized for surface-water, landscape and groundwater flow processes. The potential changes in movement of water before and after the linked effects of subsidence result in redirected or

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Computer-generated diagram made using lidar data shows beach, amusement park, river, and cliff with houses in a stippled pattern
December 18, 2014

Lidar image from point cloud

This is an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River.

December 18, 2014

PubTalk 12/2014 — Ten Years After the 2004 Indian Ocean Tsunami

How geology is reducing tsunami risk

by Bruce Jaffe, USGS Research Oceanographer

 

  • Improvements in tsunamis warnings since the 2004 Indian Ocean devastation.
  • Is California vulnerable to tsunamis?
  • What is the geologic calling card of a tsunami?
  • How does the geologic record foretell of future
November 20, 2014

PubTalk 11/2014 — Water, Nuts, and the Nation's Fruit Bowl

California's Central Valley Hydrologic Science

by Claudia Faunt, USGS Hydrologist

 

  • Using about 1% of U.S. farmland, California's Central Valley supplies 7% of the U.S. agricultural output (by value) -- 1/4 of the Nation's food, including about half of the Nation's fruits, nuts, and vegetables.
  • Approximately 20
Three men working on the back of a small boat operating gear and moving equipment.
November 7, 2014

Working on R/V Parke Snavely

PCMSC scientists maneuver the camera sled for deployment off R/V Parke Snavely in Monterey Bay. They will navigate the camera sled just above the seafloor to get a close-up view. Video, photographs, and real-time observations of seafloor geology and biological cover help develop and verify the maps created from sonar data.

A boat motors along a waterway with a jetty in the background, waters are calm and there's a lighthouse at the end of the jetty.
November 6, 2014

PCMSC research vessel Parke Snavely enters Santa Cruz Harbor

USGS Pacific Ocastal and Marine Science Center's research vessel R/V Parke Snavely motors into Santa Cruz Harbor. The lighthouse, also known as the Santa Cruz Breakwater Lighthouse, was remodeled and renamed the Walton Lighthouse on June 9, 2002.

View looking down from a bridge and onto a boat's stern and cabin top as it passes under the bridge.
October 30, 2014

View of top of R/V Parke Snavely

View looks down from a bridge as USGS research vessel R/V Parke Snavely passes beneath.

October 30, 2014

PubTalk 10/2014 — Wolf and Elk Diseases in Yellowstone

by Paul Cross, USGS Research Wildlife Biologist

 

  • What can diseases of wildlife tell us about the emergence of human pandemics?
  • Why is a bacterial disease expanding to animals beyond the Greater Yellowstone area?
  • How are diseases affecting Yellowstone wolves?
Photo looks down on top of a research vessel's pilot house roof and the deck, as the boat passes under a bridge
October 30, 2014

R/V Parke Snavely with swath system

The USGS research vessel, R/V Parke Snavely, passes under a bridge near the Santa Cruz Harbor where she docks. Snavely is owned and operated by the USGS Pacific Coastal and Mairne Science Center in Santa Cruz, California.

Photograph of a metal research boat as it motors slowly through a yacht harbor and is about to pass under a bridge.
October 30, 2014

R/V Parke Snavely in Santa Cruz Yacht Harbor

USGS Pacific Coastal and Marine Science Center's research vessel Parke Snavely motors slowly up into the Santa Cruz Yacht Harbor where she docks.

USGS all-terrain vehicle is equipped with GPS and collects beach topography on Rio Del Mar State Beach, Aptos, CA
October 21, 2014

USGS ATV Collecting Topographic Data

Photograph shows a USGS scientist navigating an all-terrain vehicle equipped with GPS, collecting topographic data on Rio Del Mar State Beach in Aptos, California. Gathering this type of information helps USGS scientists to document the changes in beach and nearshore morphology (or form and structure), caused by seasonal variations and storms.

Image: Coastal Surveys of Santa Cruz, California
October 19, 2014

Coastal Surveys of Santa Cruz, California

A USGS technician surveys the seafloor bathymetry using a personal watercraft outfitted with global positioning systems (GPS) and echo sounders.

Location: Santa Cruz, California (near Wharf).

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USGS science for a changing world logo
September 18, 2006

The U.S. Geological Survey (USGS) released a new report on shoreline change in California, studying more than 450 miles of sandy shoreline. This report is the first to address California´s historic coastal change and coastal land loss or gain for the entire state.

USGS
September 18, 2006

The U.S. Geological Survey (USGS) released a new report on shoreline change in California, studying more than 450 miles of sandy shoreline. This report is the first to address California´s historic coastal change and coastal land loss or gain for the entire state.

USGS
August 10, 2006

Numerous scientific investigations have been undertaken with the purpose of advancing the recovery of the desert tortoise (Gopherus agassizii). 

USGS
August 3, 2006

USGS Experts Present Geospatial Technology at ESRI Users Conference 2006 — San Diego Convention Center, August 6 - 11
 

USGS
June 29, 2006

Coastal erosion threatening a road and utility lines at Pleasure Point in Santa Cruz County, Calif., combined with concerns that proposed coastal armoring might alter wave breaks at this highly valued surfing spot, has prompted State and County officials to request a study by coastal scientists at the U.S. Geological Survey (USGS).

USGS
June 27, 2006

Observers tallied a total of 2,692 California sea otters for the 2006 spring survey, led by scientists at the U.S. Geological Survey (USGS). The 2006 total showed a 1.6 percent decrease in otters from the 2005 count of 2,735. It is the second year of small decreases since a record high number of otters were observed in spring 2004.

USGS science for a changing world logo
June 27, 2006

Observers tallied a total of 2,692 California sea otters for the 2006 spring survey, led by scientists at the U.S. Geological Survey (USGS). The 2006 total showed a 1.6 percent decrease in otters from the 2005 count of 2,735. It is the second year of small decreases since a record high number of otters were observed in spring 2004.

USGS
June 5, 2006

Today, June 5, 2006, the U.S. Geological Survey (USGS) announces the recipients of the third year of the Mineral Resources External Research Program, a grant and/or cooperative agreement opportunity designed to support minerals research. 

USGS science for a changing world logo
May 31, 2006

 

Two Members of the U.S. House of Representatives will join California´s Director of Conservation, State Geologist and USGS Western Region Director to kick off the Open House at the USGS Science Center at Menlo Park.

USGS
May 31, 2006

 

Two Members of the U.S. House of Representatives will join California´s Director of Conservation, State Geologist and USGS Western Region Director to kick off the Open House at the USGS Science Center at Menlo Park.

USGS science for a changing world logo
May 26, 2006

Gold-Panning to Earthquake Simulations...Satellite Imagery to Tree Rings...Science for the whole Family

Entertainment and education-packed days await visitors of all ages at the U.S. Geological Survey's (USGS) Open House at their Menlo Park Science Center on Saturday, June 3 and Sunday, June 4. The Open House will be from 10:00 a.m. until 4:00 p.m. Saturday and Sunday and admission is free.

USGS
May 26, 2006

Entertainment and education-packed days await visitors of all ages at the U.S. Geological Survey's (USGS) Open House at their Menlo Park Science Center on Saturday, June 3 and Sunday, June 4. The Open House will be from 10:00 a.m. until 4:00 p.m. Saturday and Sunday and admission is free of charge.