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: 1,211
July 25, 2002

PubTalk 7/2002 — Beyond the Golden Gate

Oceanography, Geology, Biology, and Environmental Issues In The Gulf of the Farallones

by Herman A. Karl, Marine Geologist, and Edward Ueber, Director, Gulf of the Farallones National Marine Sanctuary

 

  • Learn about the complex marine geology offshore from the San Francisco Bay region
  • Hear the story of the 47,000
June 27, 2002

PubTalk 6/2002 — Finding Elusive Earthquake Faults

New Mapping Techniques Reveal Potential Seismic Sources Beneath Seattle

By Richard J. Blakely, Geophysicist and Ralph A. Haugerud, Geologist

 

  • Geophysical methods reveal "the landscape beneath the landscape"
  • Why does the Seattle Fault exist, and why is it so hard to locate and map?
  • LIDAR imagery can
Hot Creek pool with fence that was originally built to protect the ...
June 3, 2002

Hot Creek pool with fence that was originally built to protect the ...

Hot Creek pool with fence that was originally built to protect the public from the thermal areas. Since the fence was built, a pool has formed beneath it.

March 28, 2002

PubTalk 3/2002 — Losing the Race for Survival?

The catastrophic decline of the desert tortoise in California

Kristin H. Berry, Desert Ecologist

  • Learn about the unique social behavior and fragile ecology of the desert tortoise, some of whose populations have declined by 70-90% in the past 20 years
  • Why is this fabled creature sometimes referred to as the "Methuselah
Inyo Craters volcanic chain, California
December 31, 2001

Inyo Craters volcanic chain, California

The Alignment of the Inyo Craters volcanic chain, California, is marked by Wilson Butte lava dome and Obsidian Flow in the distance on the left. Mammoth Mountain is seen on the skyline.

Shaded areas indicate where tephra layers remain from associated ve...
December 31, 2000

Shaded areas indicate where tephra layers remain from associated ve...

Shaded areas indicate where tephra layers remain from associated very large eruptions. At the time of eruption, lighter ash fall extended to greater distances than shown here.

Irrigation ditch alongside an agricultural field.
December 31, 2000

Irrigation ditch alongside an agricultural field in California's Central Valley

Irrigation systems in Central California Valley Ecoregion: Single-field irrigation ditch.

Attribution:
Grasslands and agricultural fields in the flat foreground, with housing development on the hills beyond.
December 31, 2000

Grasslands and agricultural fields, with housing development on the hills beyond.

Conversions of grassland/shrubland and agriculture to developed land were two common land-cover changes in Southern and Central California Chaparral and Oak Woodlands Ecoregion.

Attribution:
Twilight photo of cone-shaped mountain with snow on top  and city lights at its base
December 31, 2000

Mount Shasta with city lights

Twilight image of snow-covered Mount Shasta. Lights from the town of Weed, California are visible at the mountain's base.

water quality
November 30, 2000

Gate on a stream in the Sierra Nevada mountains

water gate on sierra nevada stream

Filter Total Items: 923
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.

USGS
March 16, 1998

Earthquakes, as well as heavy rains, can cause landslides, but with the completion of a new U.S. Geological Survey mapping project, scientists and planners can see where those landslides might be triggered by southern California’s next large earthquake.

USGS
March 2, 1998

Secretary of the Interior Bruce Babbitt today was joined by Congresswoman Anna Eshoo in announcing a long-term lease that will keep the U.S. Geological Survey (USGS) in its historic Menlo Park, Calif., location. USGS Acting Director Tom Casadevall joined Babbitt and Eshoo for the announcement at an all-employees meeting at the Menlo Park campus.

USGS
February 11, 1998

Many of the tarballs washing up on the shores of Monterey Bay are most likely from natural seeps from the floor of Monterey Bay and the continental shelf, rather than from ruptured oil tankers and other man-made occurrences, according to scientists from the U.S. Geological Survey in Menlo Park, Calif.

USGS
February 6, 1998

PUBLIC LECTURE: "Natural History of Coastal Redwoods -- Fire, Floods and Fog," is the subject of the U.S. Geological Survey’s FREE Public Lecture on THURSDAY, FEBRUARY 26, 1998. 

USGS
February 3, 1998

As heavy rains continue to pound northern and central California, hydrologists with the U.S. Geological Survey are reporting small stream flooding from Ventura County on the south to Eureka on the north.

USGS
December 29, 1997

A light earthquake, preliminary magnitude 4.1 according to the U.S. Geological Survey, occurred at 3:02 PM EST (12:02 PM local time) Monday, Dec 29, 1997. The epicenter is located 5 miles SE of Mammoth Lakes, or 33 miles WNW of Bishop, CA.