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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October 14, 2008

Groundshaking animation: Hayward Fault, San Pablo Bay epicenter

Animation showing the intensity of groundshaking across the San Francisco Bay region during a hypothetical M 7.0 earthquake on the Hayward Fault with the epicenter in San Pablo Bay. Visit M7.0 Earthquake Scenarios - Hayward Fault for detailed perspective views.  

Attribution: Natural Hazards
October 14, 2008

Groundshaking animation: Hayward Fault, Fremont epicenter

Animation showing the intensity of groundshaking across the San Francisco Bay region during a hypothetical M 7.0 earthquake on the Hayward Fault with the epicenter in Fremont. Visit M7.0 Earthquake Scenarios - Hayward Fault for detailed perspective views.  

Attribution: Natural Hazards
September 25, 2008

PubTalk 9/2008 — Ready for the Next Big Bay Area Earthquake?

The 1989 Loma Prieta Earthquake was not the Bay Area's "Big One" but a repeat of the destructive 1868 Hayward earthquake may qualify!

by Tom Brocher, USGS Seismologist

 

  • The next large Hayward Fault earthquake will effect the entire San Francisco Bay Area - Are You Prepared?
  • The Hayward Fault is the most
A sea star with lots of legs on a sandy bottom of the sea.
August 31, 2008

Sunflower sea star on the seafloor

Photograph of the seafloor off the California coast showing coarse sand, shells, and a sunflower sea star. It was taken during a "ground-truthing" survey off of Salt Point, California, in support of the California Seafloor Mapping Program.

August 28, 2008

PubTalk 8/2008 — How the Earth Copes with Our LUSTs

The amazing capabilities of subsurface life

by Barbara Bekins, USGS Research Hydrologist

 

LUST= Leaking Underground Storge Tank

  • By some estimates, the total carbon in subsurface bacteria is nearly as large as the carbon in all surface plants
  • Underground microorganisms are capable of biodegrading an array
Image: California Coast Seafloor
August 18, 2008

California Coast Seafloor

This photograph is of the seafloor off the California coast and shows coarse sand, shells and a sunflower sea star. 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

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Image: Sea Otter in Monterey Bay, California
August 9, 2008

Sea Otter in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

Image: Sea Otter Swims in Monterey Bay, California
August 9, 2008

Sea Otter Swims in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

Image: Sea Otter Swims in Monterey Bay, California
August 9, 2008

Sea Otter Swims in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

Image: Sea Otter in Monterey Bay, California
August 9, 2008

Sea Otter in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

Image: Sea Otter Swims in Monterey Bay, California
August 9, 2008

Sea Otter Swims in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

Image: Sea Otter Swims in Monterey Bay, California
August 9, 2008

Sea Otter Swims in Monterey Bay, California

A sea otter swims in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction.

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USGS
October 2, 2001

Scientists from the U.S. Geological Survey’s Earthquake Hazards Team will be on site at an open trench on the Hayward Fault, Tuesday, October 2, to explain to city and county officials and transportation managers, the importance of trenching operations to earthquake research, and the latest results of trenching the Hayward Fault. 

USGS science for a changing world logo
September 7, 2001

New technologies in the form of Interferometric Synthetic Aperture Radar (InSAR) and the Global Positioning System (GPS) have helped scientists determine that fluid-like flow occurred just below the earth’s crust in the first few months following two recent large California earthquakes.

USGS
September 7, 2001

New technologies in the form of Interferometric Synthetic Aperture Radar (InSAR) and the Global Positioning System (GPS) have helped scientists determine that fluid-like flow occurred just below the earth’s crust in the first few months following two recent large California earthquakes.

USGS science for a changing world logo
July 26, 2001

 

Imagine the world’s oceans teeming with whales, sea turtles and fishes, with shellfish so abundant they posed a hazard to navigation. Only in a Jules Verne classic fantasy? Not so. A group of scientists from several research institutions has recently depicted that such rich ocean life existed in the not-so-distant past. 

USGS science for a changing world logo
June 12, 2001

Last year up; this year down, but the number of sea otters in California remain roughly stable, neither increasing or decreasing rapidly, according to the scientists who study them. Still, a lack of sustained growth worries researchers and sea otter watchers.

USGS
June 12, 2001

Note to news editors: View a summary of spring surveys of California sea otters for 1983-2001, and three-year averages at http://www.werc.usgs.gov/otters/ca-surveys.html. Information about sea otter mortality can be viewed at http://www.nwhc.usgs.gov/news/seaottrs.html.

USGS science for a changing world logo
June 6, 2001

A newly released United States Geological Survey paper indicates that a significant zone of genetic mixing is occurring between northern spotted owls and California spotted owls, particularly in extreme northern California and southern Oregon.

USGS
June 6, 2001

A newly released United States Geological Survey paper indicates that a significant zone of genetic mixing is occurring between northern spotted owls and California spotted owls, particularly in extreme northern California and southern Oregon.

USGS science for a changing world logo
May 11, 2001

While some folks may make a special effort to ride their bikes to work on the appointed day, May 17, it will be just another day to sit back and take it easy for John Fisher, who lives in Fremont and works as a cartographer at the U.S. Geological Survey in Menlo Park.

USGS
May 11, 2001

While some folks may make a special effort to ride their bikes to work on the appointed day, May 17, it will be just another day to sit back and take it easy for John Fisher, who lives in Fremont and works as a cartographer at the U.S. Geological Survey in Menlo Park.

USGS science for a changing world logo
April 30, 2001

A team of university, government, and private biologists have successfully spawned white abalone, a crucial step in developing a white abalone hatchery. Stocking of hatchery-reared white abalone is one of the possible strategies that may be used to rebuild the white abalone population, which is being considered for listing as an endangered species.

USGS
April 30, 2001

A team of university, government, and private biologists have successfully spawned white abalone, a crucial step in developing a white abalone hatchery. Stocking of hatchery-reared white abalone is one of the possible strategies that may be used to rebuild the white abalone population, which is being considered for listing as an endangered species.