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: 1,073
January 30, 2003

PubTalk 1/2003 — Exploring Mars

Recent Discoveries and Upcoming Missions

By Michael H. Carr, Planetary Geologist

 

  • Thirty years of Mars exploration have revealed a spectacularly diverse planet
  • Dry river valleys and layered sediments suggest a warm, wet past
  • Huge floods may have created transient oceans
  • Towering volcanoes, deep
Illustration looking at the land from out over the ocean, as if the water were drained away, to show seafloor features.
December 31, 2002

Los Angeles Margin and Basin

Overall perspective view of the Los Angeles Margin and Basin looking northeast. The distance across the bottom of the image is about 100 kilometers with a vertical exaggeration of 6 times. The margin is bisected by a series of large underwater canyons, channels, and gullies. Underwater landslides occur along the steep slope off the Palos Verdes Peninsula (far right)

...
December 12, 2002

PubTalk 12/2002 — Hawai`i's Volcanoes—Never a Dull Moment

20 Years of Eruption at Kilauea and Waiting for Mauna Loa

by Don Swanson,Volcanologist, Hawaiian Volcano Observatory

 

  • Kilauea's Pu'u O'o-Kupaianaha eruption, which began on January 3, 1983, is already the volcano's longest rift eruption in at least 600 years
  • Lava has destroyed 8 miles of highway and 189
November 21, 2002

PubTalk 11/2002 — What is a Butterfly Worth?

Challenge of Making Economic Estimates for Biodiversity

by Alicia Torregrosa, Geographer and Ecologist

 

  • How can we best strike a balance between vineyard development and wildlife in the Napa Valley?
  • Geographic Information System (GIS) facilitates comparing the "apples and oranges" of endangered species and the
Image: California Sea Lion (Zalophus californianus)
October 31, 2002

California Sea Lion (Zalophus californianus)

California sea lions on a platform.

Attribution: Ecosystems
Image: California Sea Lion (Zalophus californianus)
October 31, 2002

California Sea Lion (Zalophus californianus)

California sea lions on a platform.

Attribution: Ecosystems
Image: California Sea Lion (Zalophus californianus)
October 31, 2002

California Sea Lion (Zalophus californianus)

California sea lions on a platform.

Attribution: Ecosystems
Image: California Sea Lion (Zalophus californianus)
October 31, 2002

California Sea Lion (Zalophus californianus)

California sea lions on a platform.

Attribution: Ecosystems
Image: California Sea Lion (Zalophus californianus)
October 31, 2002

California Sea Lion (Zalophus californianus)

California sea lions on a platform.

Attribution: Ecosystems
October 24, 2002

PubTalk 10/2002 — Plumbing the Mysteries of the San Andreas Fault

Deep Drilling to Test Fundamental Theories About Faulting and Earthquakes

By Stephen H. Hickman, Geophysicist

 

  • Scientists will make measurements, obtain samples and place instruments directly within the fault at a depth of 2.5 miles, creating the San Andreas Fault Observatory at Depth (SAFOD)
  • SAFOD's instruments
View from the sky looking at a very high coastal cliff with gentle waves.
September 30, 2002

Coastal cliffs near Fort Funston in 2002

Photograph of a coastal cliff where a large landslide occurred between 2002 and 2010. This photo, taken in 2002, shows the cliff before the landslide.

September 26, 2002

PubTalk 9/2002 — Healing the Redwood Creek Watershed

Successes and Failures in a Large-scale Watershed Restoration Program

by Mary Ann Madej, Geologist

 

  • Can we undo the effects of decades of logging and road-building on salmon habitat and redwood forest?
  • The Redwood Creek restoration program in California--one of the Nation.s largest and longest-running watershed
Filter Total Items: 965
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.

USGS
March 16, 1998

Although the San Andreas fault near Parkfield, Calif., has not yet produced a predicted magnitude-6 earthquake, geodetic measurements now indicate that fault movements near Parkfield sped up in 1993, according to U.S. Geological Survey scientist Evelyn Roeloffs.