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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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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Image: California Coast Seafloor
September 27, 2007

California Coast Seafloor

This photograph is of the seafloor off the California coast and shows rock outcrop, encrusting sponge, cup corals, red sea star and a female kelp greenling. 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

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September 27, 2007

PubTalk 9/2007 — A Tale of Two Kelp Forests

Sea Otters and Ecosystem Dynamics in the Aleutians and the Commander Islands

By Tim Tinker, Research Biologist, University of California, Santa Cruz 

Sea otter populations in the central and western Aleutian Islands have declined by 75-95% over the past 15-20 years, while populations in the nearby Russian Commander Islands have remained

August 30, 2007

PubTalk 8/2007 — Dark Holes in Muir's "Range of Light"

Insights from southern Sierra Nevada caves and karst

By John C. Tinsley, Geologist
 

  • Water long ago carved many caves in carbonate rocks of the Sierra Nevada
  • As the Sierra (John Muir's "Range of Light") was uplifted, successively deeper caves were drained and decorated during the past 5 million years
  • Vertical
July 26, 2007

PubTalk 7/2007 — Plate Tectonics in Action

Exploring the Earth with the new edition of This Dynamic Planet map and Web site

By Robert Tilling, Volcanologist, and Stephen Kirby, Earthquake Geophysicist
 

  • Improved digital data on the distribution of Earth's volcanoes, earthquakes, and meteorite impact craters
  • Special maps of polar regions, showing
June 28, 2007

PubTalk 6/2007 — Adventures in Southwest Geology

Exploring the colorful southern Colorado Plateau in 3-D

By Philip Stoffer, Geologist

Take a colorful tour with the help of 3-D photography through some of the region's highlights:

  • A plethora of parklands- Petrified Forest, Chaco Canyon, Wupatki, Grand Canyon
  • High desert climate changes, past, present, and
Filter Total Items: 973
USGS
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.

USGS science for a changing world logo
March 6, 2001

Removing abandoned forest roads and restoring the natural characteristics of slopes and stream channels in the Redwood National and State Parks in northern California have substantially reduced the delivery of sediment to salmon-bearing streams, according to a research geologist with the U.S. Geological Survey.

USGS
March 6, 2001

Removing abandoned forest roads and restoring the natural characteristics of slopes and stream channels in the Redwood National and State Parks in northern California have substantially reduced the delivery of sediment to salmon-bearing streams, according to a research geologist with the U.S. Geological Survey.

USGS science for a changing world logo
February 19, 2001

Like the Florida Everglades, California’s Sacramento-San Joaquin River Delta has been radically transformed by human activities. In the past three decades, monitoring programs have documented remarkable declines in living resources from primary producers to fish. 

USGS
February 19, 2001

Like the Florida Everglades, California’s Sacramento-San Joaquin River Delta has been radically transformed by human activities. In the past three decades, monitoring programs have documented remarkable declines in living resources from primary producers to fish. 

USGS science for a changing world logo
February 5, 2001

Aerial photographs supplied to the Santa Clara County Sheriff’s Search and Rescue Team, by the U.S. Geological Survey, are being used to search for the remains of Xiana Fairchild. A child’s skull, which was found near Lexington Reservoir on January 19, has been identified through dental records and DNA tests, as that of the missing 7-year-old Vallejo girl who disappeared in December 1999.

USGS
February 5, 2001

Aerial photographs supplied to the Santa Clara County Sheriff’s Search and Rescue Team, by the U.S. Geological Survey, are being used to search for the remains of Xiana Fairchild. 

USGS science for a changing world logo
January 22, 2001

A new geologic map of surficial deposits in the nine-county San Francisco Bay region that can be used to evaluate earthquake hazards has been released in digital form by the U.S. Geological Survey in Menlo Park.

USGS
January 22, 2001

A new geologic map of surficial deposits in the nine-county San Francisco Bay region that can be used to evaluate earthquake hazards has been released in digital form by the U.S. Geological Survey in Menlo Park.

USGS science for a changing world logo
January 16, 2001

In conjunction with the seventh anniversary of the 1994, 6.7 Northridge earthquake, the U.S. Geological Survey, in cooperation with the Southern California Earthquake Center (SCEC) and the National Science Foundation (NSF), has produced a two-page fact sheet that explains how geologic conditions in the Los Angeles basin affect the amount of shaking experienced by various areas of the basin.

USGS
January 16, 2001

In conjunction with the seventh anniversary of the 1994, 6.7 Northridge earthquake, the U.S. Geological Survey, in cooperation with the Southern California Earthquake Center (SCEC) and the National Science Foundation (NSF), has produced a two-page fact sheet that explains how geologic conditions in the Los Angeles basin affect the amount of shaking experienced by various areas of the basin.

USGS science for a changing world logo
December 21, 2000

DNA sequence data revealed a deep genetic split between common ravens from the southwest United States compared to the rest of the world, according to a journal article in the December 22 issue of the Proceedings of the Royal Society of London, Biological Sciences.