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: 1,110
June 26, 2003

PubTalk 6/2003 — The Quakes, They Are A-comin'

New Estimates of Earthquake Hazard and Risk Across the Bay Region

By Michael Blanpied, Geophysicist

 

  • A USGS-led Working Group has used new ideas about Bay Area faults and earthquakes to revise the probabilities for future quakes
  • The slow movement of the Earth.s plates builds up stress that is relieved in violent
May 22, 2003

PubTalk 5/2003 — The National Map—Coming to Your Neighborhood!

Integrating and Sharing Geographic Information in the Public Domain

By Ken Osborn, Cartographer 

 

  • Begun by the USGS in 2001, The National Map is a 10-year vision for a seamless, constantly updated, national geospatial database
  • This vast public database will be continually updated through local
April 24, 2003

PubTalk 4/2003 — Gaia's Breath

Methane and the Future of Natural Gas

By Keith A. Kvenvolden, Geochemist 

 

  • The Earth--or "Gaia," the Earth Goddess of Ancient Greece-- exhales more than 1 million tons of methane each day
  • Mud volcanoes around the world emit about 5 million tons of methane each year as part of Gaia's breath
  • Energy
map of western U.S.showing sagebrush-dominated ecoregions
March 15, 2003

Sagebrush-dominated ecoregions

Sagebrush-dominated ecoregions in the western United States (sagebrush cover types shown in various shades of yellow, pink, and blue-grey).

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
Filter Total Items: 985
USGS
November 25, 1997

All offices of the U.S. Geological Survey will be closed Thursday, of course, to observe the Thanksgiving holiday, but will be open as usual on Friday, November 28.

USGS
October 29, 1997

The U.S. Geological Survey (USGS) today joined forces with other federal and state agencies to announce specific efforts to implement recommendations of this summer’s Lake Tahoe Presidential Forum, including creation of an Internet-based clearinghouse of scientific information for the Lake Tahoe area.

USGS
October 21, 1997

The presence of 125,000-year-old microfossils in the muds of San Francisco Bay may help engineers decide where and how to rebuild the San Francisco-Oakland Bay Bridge, according to a U.S. Geological Survey(USGS)scientist in Menlo Park, Calif.

USGS
September 2, 1997

The effects of ground-water development on ground-water levels and ground-water quality in the town of Atherton, Calif., is the focus of a report released by the U.S. Geological Survey , Department of the Interior.

USGS
August 8, 1997

More than 200 exhibits dealing with topics from ocean floor photography to the geology of Mars will be highlighted at the U.S. Geological Survey’s open house at its Western Region Center in Menlo Park, Calif., September 13 and 14. 

USGS
August 8, 1997

The U.S. Geological Survey needs help to prepare for and assist at its big open house, September 12, 13 and 14, at the USGS Western Region Center in Menlo Park.

USGS
July 16, 1997

Experience over the last several years with the current system for describing the level of geologic unrest, such as earthquake swarms, ground deformation and gas emissions in the Long Valley caldera of eastern California, has shown it to be awkward and susceptible to misinterpretation by both the news media and the public.

USGS
July 8, 1997

A team of Bay Area earthquake scientists will be looking for more than old golf balls when they open an exploratory trench on the second fairway of the Mira Vista golf course in El Cerrito, this week. Golf course officials have rerouted the sedonc hole in order to give the geologists a 10-day window for the study.

USGS
May 29, 1997

Selected, local editions of U.S. Geological Survey topographic maps will be available for purchase at the USGS exhibit that will be part of the San Francisco Bay Trail Project’s National Trails Day Festival, Saturday, June 7, at Robert Crown Memorial State Beach and Crab Cove Visitor’s Center in Alameda.

USGS
April 15, 1997

Peat soils in the Sacramento-San Joaquin Delta and their relationship to water quality; the history and consequences of long-term groundwater use in the Mojave Desert; the hydrology, biology and geology of San Francisco Bay; 

USGS
April 15, 1997

Dr. Gordon Eaton, the national director of the U.S. Geological Survey in Reston, Va., will be one of the speakers at the Friday, April 18, 1997 dedication of Placer Hall on the California State University at Sacramento campus.

USGS
April 15, 1997

The presence of the U.S. Geological Survey in Placer Hall on the campus of California State University at Sacramento marks the latest chapter in the USGS’s long association with the study of earth sciences in California and cooperation with the state’s Division of Mines and Geology and its higher education system.