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: 1,125
February 24, 2005

PubTalk — When Rocks Fall and the Land Slides

Hear why California makes an ideal environment for landslides North face

By Gerald F. Wieczorek, Geological Engineer, and
Raymond C. Wilson, Landslide Geologist

  • Hear why California makes an ideal environment for landslides North face
  • Learn about rock falls, debris flows, and other landslides Rocks fall
January 29, 2005

PubTalk 1/2005 — Deciphering an Estuarine Ecosystem

35 Years of San Francisco Bay Studies

By John Conomos, Scientist Emeritus

 

  • USGS research in the Bay system began in the 1960s with a search for underwater earthquake faults
  • In the 1970s, the research team expanded to cover studies of water properties and quality, water mixing and flow, and estuarine ecology
Moutain Diablo in the early morning
December 31, 2004

Mt. Diablo from Suisun Marsh

Picturesque view of Mt.Diablo early in the morning from Suisun Marsh.

Attribution:
map of California shaded by GAMA deep aquifer study units
December 31, 2004

GAMA Public-supply Well (Deep Aquifer) Assessment Study Units

The GAMA program is a comprehensive assessment of statewide groundwater quality. The program is designed to help better understand and identify risks to groundwater resources. Groundwater is sampled at many locations across California in order to characterize its constituents and identify trends in groundwater quality. The results of these tests provide information for

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Poster laid out with photos, images, and text.
December 31, 2004

Big Sur Coastal Landslides

Large-scale poster describing USGS work.

The USGS studied air photos of the Big Sur coast taken in 1942 and 1994, in cooperation with the California Department of Transportation (Caltrans) and the University of California at Santa Cruz (UCSC).

We used the photographs to create 3D computer models. By comparing the two models, we can see the differences caused

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This poster shows information about the greater San Francisco Bay area, with text that talks about our research in the area.
December 31, 2004

Oceanography Beyond the Golden Gate

Large-scale poster describing USGS work.

The USGS measured ocean currents and temperatures off Central California as part of an international group of Federal, State, Academic, and private institutions. The project was part of a larger study that took nearly 14 years to finish. This group also studied geology, biology, and environmental issues in the Gulf of the

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Poster with illustrations of the underwater part of the ocean, with text about the work done in the area.
December 31, 2004

Tsunami Hazards in the Santa Barbara Channel

Large-scale poster describing USGS work.

The USGS, in cooperation with Moss Landing Marine Laboratory, mapped the slopes of the Santa Barbara Channel using sonar. We combined this with deep sea drilling records and seismic records to make these maps.

Large earthquakes can cause the very large underwater landslides that we found in the channel. These

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November 18, 2004

PubTalk 11/2004 — From Plane Tables to Pixels

The Revolution in Mapping at the U.S. Geological Survey

by Susan P. Benjamin, Research Geographer

  • Mapping the United States in the 19th century was arduous, dangerous work; flash floods, bears, and bandits were just a few hazards
  • By the mid-20th century, aerial photography, photogrammetry, and stereophoto pairs, allowed
October 30, 2004

PubTalk 10/2004 — Hot Oil, Frozen Ground, and Earthquakes

The Trans-Alaska Pipeline story-- so far, so good!

by George Gryc, Arthur Lachenbruch, and Robert Page, Scientists Emeriti

  • The 1968 discovery of North America.s largest oil fi eld on the Arctic coast posed the challenge of an 800-mile pipeline to carry hot oil across mountains, rivers, and the giant Denali Fault
  • The oil
Attribution: Region 11: Alaska
September 25, 2004

PubTalk 9/2004 — The Winemaker's Dance

Connecting Geology and Wine in Napa Valley

by David G. Howell, Geologist Emeritus

  • Does a glass of wine really contain 100 million years of geologic history ?
  • How did continental glaciation help shape the Napa Valley's soils?
  • Are the hills in Napa Valley that help control its microclimates really megalandslides
Picture of a agriculture field in California
September 1, 2004

Agriculture field in California

An agriculture field in California taken during field work for the Trends Lancover Change project.

Filter Total Items: 975
USGS
July 28, 1998

The exotic species of plant and animal life that have invaded San Francisco Bay are the topic of this Thursday’s free public lecture, sponsored by the U.S. Geological Survey in Menlo Park.

USGS
July 1, 1998

Life at the Bottom of San Francisco Bay is a world of emigrants versus the natives, as exotic species replace and react to native species and alter the biotic balance of the Bay ‘s food chain. The history and effects of the exotic invaders is the subject of the U.S. Geological Survey ‘s free public lecture, Thursday, July 30, 7 p.m., at the Menlo Park City Council Chambers, 701 Laurel St., Menlo P

USGS
June 30, 1998

The fabled waters of Lake Tahoe may soon become clearer as U.S. Geological Survey (USGS) scientists make plans to map the mysterious floor of the lake, using the ocean exploration technology known as "multi- beam bathymetry." 

USGS
June 22, 1998

Gasoline-related compounds were found in water samples from Lake Tahoe by U.S. Geological Survey scientists during the July through September 1997 boating season. MTBE (methyl tert -butyl ether), a gasoline additive, was found in non-toxic concentrations throughout the lake, as deep as 90 feet. 

USGS
June 10, 1998

Visitors to the U.S. Geological Survey’s exhibit booth at the Monterey Bay Oceans Fair will be able to "feel the bay," by squishing different types of San Francisco Bay muds through their fingers, view microscopic critters that live in those muds, and view maps of the seafloor, at the fair, from noon to 8 p.m., Friday, June 12, 1998, in Monterey, Calif.

USGS
June 5, 1998

Residents of the San Jose area who would like to become partners with the USGS in monitoring earthquake activity in the Santa Clara Valley this summer can become part of that project by offering space in their backyards to the USGS.

USGS
June 5, 1998

The Lake Tahoe Data Clearinghouse, a virtual, web-based project, providing everything from digital maps of the lake and surrounding basin to notes from recent presidential forum meetings, is now on line at http://blt.wr.usgs.gov/

USGS
April 21, 1998

The U.S. Geological Survey has released a series of reports on results of a five-year study on, the quality of water in 20 major basin regions throughout the nation, including the San Joaquin-Tulare Basins, which cover most of central California and are a major source or drinking water for most of the State’s population. The report, "Water-Quality in the San Joaquin-Tulare Basins, California) 1992

USGS
April 15, 1998

A news conference to explain the post-El Nino aerial survey that is being conducted along the Pacific coast is scheduled for 1 p.m., Thursday, April 16, at the Delmonte Jet Center, adjacent to the Monterey Peninsula Airport, on the east side of Monterey.

USGS
April 10, 1998

Properly assessing the impacts of powerful storms associated with El Nino which have brought unprecedented erosion to the United States’ west coast is an enormous task. NASA , the U. S. Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA) are combining efforts to provide public officials with the tools they need to accurately assess coastal erosion.

USGS
March 19, 1998

Dr. Milton Friend, director of the USGS National Wildlife Health Center, has been named by Interior Secretary Bruce Babbitt to serve as chairman of the Salton Sea Science Subcommittee.

USGS
March 18, 1998

Southern California is not likely to experience a "huge earthquake,"according to two scientists with the U.S. Geological Survey.