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

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A large poster has photos, maps, and text on it to show what research was done in Pleasure Point, Santa Cruz, California.
December 31, 2007

Does Pleasure Point Need a Seawall?

The USGS, in cooperation with Santa Cruz County and the California Department of Boating and Waterways, studied the seacliffs, ocean floor, and waves of Pleasure Point, California.   We created detailed maps of the seacliffs and ocean floor using LIDAR laser scanners and sonar. We measured wave action using digital photos and videos, a wave gauge, and a current meter. We

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December 13, 2007

PubTalk 12/2007 — Exploring Antarctica's Frozen Frontier

The USGS Antarctic Program from the 1957 International
Geophysical Year to the 2007 International Polar Year

By Jerry Mullins, Coordinator, USGS Antarctic, Arctic and Canadian Programs
and John Behrendt, USGS Geophysicist Emeritus

 

 

  • Learn about USGS surveying and mapping of "The Frozen Continent"
November 15, 2007

PubTalk 11/2007 — Disasters, Dust, .... and Danger?

Using geoscience to help understand whether health risks lurk in particles produced by disasters

By Geoff Plumlee, Research Geochemist 

 

  • Valley Fever outbreak following the 1994 Northridge, California earthquake
  • World Trace Center collapse
  • Hurricane Katrina flooding
  • 1996 Marinduque,
USGS scientists navigate personal water craft around San Francisco Bay, collecting bathymetric data.
October 26, 2007

Collecting Bathymetric Data in San Francisco Bay

USGS scientists Patrick Barnard (left) and Jeff Hansen navigate personal watercraft equipped with GPS and echo sounders through the waters of San Francisco Bay. They are collecting bathymetric, or depth, information in order to create maps of the bottom of the Bay. The maps will be used to determine how the morphology or shape of the Bay floor changes through time.

October 25, 2007

PubTalk 10/2007 — Fire As An Ecosystem Process

Past, Present, And Future

By Jon E. Keeley, Research Ecologist 

 

  • Plants have evolved over hundreds of millions of years with fire.
  • Are human-induced changes threatening naturally fire-prone ecosystems?
  • How has human suppression of fire affected different ecosystems?
  • Will predicted climate
Image: 2007 Landslide in La Jolla, California
October 4, 2007

2007 Landslide in La Jolla, California

This event occurred on October 4, 2007 in La Jolla, California. A landslide, perhaps first indicated in July by cracks appearing in pavement and homes along Soledad Mountain Road, struck suddenly when a massive slab of hillside broke loose, sending tons of dirt cascading toward streets below.

Underwater photograph of jellyfish floating, they appear to be glowing.
October 1, 2007

Jellyfish offshore of central California

This photograph of the seafloor off the California coast also shows jellyfish in the water column. This photograph was collected as part of the California Seafloor and Coastal Mapping Program.

Image: Fish Swimming Underwater Offshore Northern California
September 30, 2007

Fish Swimming Underwater Offshore Northern California

A kelp greenling fish swimming above a seafloor of mixed gravel, cobble and rock outcrop with scattered shell. Fish is approx. 20 cm (8 inches) long. Image acquired 1 km (0.62 miles) offshore Half Moon Bay, California at a depth of 14 meters (46 ft). Also in the image are encrusting sponges, red algae (seaweed), and orange cup corals.

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Attribution: Ecosystems
Fish on seafloor, Offshore Northern California
September 30, 2007

Fish on seafloor, Offshore Northern California

A kelp greenling fish swimming above a seafloor of mixed gravel, cobble and rock outcrop with scattered shell. Fish is approx. 20 cm (8 inches) long. Image acquired 1 km (0.62 miles) offshore Half Moon Bay, California at a depth of 14 meters (46 ft). Also in the image are encrusting sponges, red algae (seaweed), and orange cup corals.

Image: California Coast Seafloor
September 28, 2007

California Coast Seafloor

This photograph is of the seafloor off the California coast and shows jellyfish in a water column. This photograph supports the California Seafloor Mapping Program (CSMP), which was initiated in 2007 by the California Ocean Protection Council. Data collected during this project reveal the seafloor offshore of the California coast in unprecedented detail and provide

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Image: Sea Stars Underwater Offshore Northern California
September 28, 2007

Sea Stars Underwater Offshore Northern California

Three sea stars on a rock, surrounded by a sandy seafloor littered with broken shells. Each sea star is approx. 10 - 15 cm (4-6 inches) across. Image acquired 4.5 km (3 miles) offshore Pigeon Point, southern San Mateo County, California at a depth of 52 meters.

Attribution: Ecosystems
Image: California Coast Seafloor
September 27, 2007

California Coast Seafloor

Photograph showing the seafloor off the California coast. This photograph supports the California Seafloor Mapping Program (CSMP), which was initiated in 2007 by the California Ocean Protection Council. Data collected during this project reveal the seafloor offshore of the California coast in unprecedented detail and provide an ecosystem context for the effective

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USGS
April 18, 2001

Following the great 1906 San Francisco earthquake, a large number of distant aftershocks or triggered earthquakes occurred much farther away from the fault than previously realized, according to scientists at the U.S. Geological Survey.

USGS
April 17, 2001

Eyewitness accounts of the 1906 earthquake in San Francisco agree on a number of striking points, according to Jack Boatwright of the U.S. Geological Survey.

USGS science for a changing world logo
April 16, 2001

On the 95th anniversary of the great San Francisco earthquake, scientists from the U.S. Geological Survey will join their colleagues in the Seismological Society of America (SSA) to discuss new findings on the 1906 earthquake that devastated San Francisco; the Nisqually earthquake that lightly slapped the Seattle-Tacoma area six weeks ago; and several other large earthquakes.

USGS
April 16, 2001

On the 95th anniversary of the great San Francisco earthquake, scientists from the U.S. Geological Survey will join their colleagues in the Seismological Society of America (SSA) to discuss new findings on the 1906 earthquake that devastated San Francisco;

USGS science for a changing world logo
April 6, 2001

A number of researchers from the U.S. Geological Survey will join about 900 of their fellow geoscientists from around the world to discuss updates and unanswered questions about the Northridge earthquake and new earthquake possibilities in southern California 

USGS
April 6, 2001

A number of researchers from the U.S. Geological Survey will join about 900 of their fellow geoscientists from around the world to discuss updates and unanswered questions about the Northridge earthquake and new earthquake possibilities in southern California

USGS science for a changing world logo
March 22, 2001

There’s good news and bad news for the Sacramento River system, according to a new report from the U.S. Geological Survey. "The water quality of the Sacramento River and its major tributaries, such as the Feather and American rivers, is generally healthful for drinking and irrigation water, recreation, and the protection of fish and other aquatic life," said USGS Project Manager,Joseph Domagalski.

USGS
March 22, 2001

There’s good news and bad news for the Sacramento River system, according to a new report from the U.S. Geological Survey.

USGS science for a changing world logo
March 21, 2001

The highly developed and urbanized area of coastal southern California is host to one of the richest regions of amphibians and reptiles in the United States, and includes several species with state- and federal-protected status.

USGS
March 21, 2001

With more than 400,000 volumes and 35,000 maps, the library of the U. S. Geological Survey, at 345 Middlefield Road, Menlo Park, is the largest earth-science library on the West Coast, and part of the largest earth sciences library system in the world.

USGS
March 21, 2001

The highly developed and urbanized area of coastal southern California is host to one of the richest regions of amphibians and reptiles in the United States, and includes several species with state- and federal-protected status.

USGS science for a changing world logo
March 20, 2001

Power outages that may occur on the San Francisco peninsula will not affect the earthquake monitoring ability of the U.S. Geological Survey in Menlo Park.