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
August 29, 2002

PubTalk 8/2002 — Revealing the Hidden World Beneath Monterey Bay

Explore the diverse features on and below the sea floor in the Monterey Bay National Marine Sanctuary

by Steve Eittreim, Marine Geologist

 

  • See---
    • Drowned bedrock pinnacles that provide shelter for rockfish
    • Earthquake faults that slice through the sea floor
    • New, highly detailed views of the
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
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
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:
water quality
November 30, 2000

Gate on a stream in the Sierra Nevada mountains

water gate on sierra nevada stream

USGS Scientists - Lake Tahoe
November 30, 2000

USGS Scientists - Lake Tahoe

USGS Scientists - Lake Tahoe

Sea Otter Catpure and Tagging at Sunrise
November 30, 2000

Sea Otter Capture and Tagging at Sunrise

USGS marine biologists set sail on a crisp September morning to capture and tag wild sea otters to monitor the health of this threatened species.

Map of study area, Yucca Valley, California.
December 31, 1999

Map of study area, Yucca Valley, California.

Map of study area, Yucca Valley, California.

Two men stand by an oil well pumping unit, one man is crouched over the well, all in a forested location.
August 12, 1999

Oil well pumping unit, south area of the La Honda oil field, CA

The south area of the La Honda oil field, California, was discovered during the late 1950s and produced an estimated 595,000 barrels of oil from about 12 wells, including the well in this photo. Most of the oil was produced from an unusual fossiliferous limestone of Miocene age, informally named the Burns sand, that overlies a thick sequence of Oligocene and Miocene

...
Researcher in Mojave Desert
December 31, 1998

Researcher in Mojave Desert

One of 1,695 repeat photographs taken to provide context for the classification of the Central Mojave Desert into various vegetation classes.

Filter Total Items: 965
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. 

USGS
December 10, 1997

A striking full-color map showing permafrost and ground ice over the Arctic and surrounding continental land masses has been released by the U.S. Geological Survey and will be displayed at the American Geophysical Union meeting in San Francisco this week. 

USGS
December 10, 1997

The ability to learn the magnitude and location of an earthquake almost as it’s happening and track rising flood waters are examples of the kind of "real-time" monitoring that enables anyone with a personal computer and access to the Internet to obtain information about natural hazards as they occur.

USGS
December 10, 1997

They don’t have bells and whistles, and you’ll probably never see one on "Baywatch," but the U.S. Geological Survey’s real-time, telemetered stream-gauges are proving their worth when it comes to saving lives and lessening flood damage

USGS
December 8, 1997

"Heavy breathing" at Yellowstone and heavy metals in the nation’s surface and ground-water are two subjects of more than 100 oral and poster presentations by scientists from the U.S. Geological Survey, at the annual meeting of the American Geophysical Union (AGU) in San Francisco, Dec. 8-12.

USGS
December 7, 1997

Otis Redding may have waxed eloquently about "Sitting By the Dock of the Bay," but its flying over the floor of San Francisco Bay that has scientists at the U.S. Geological Survey humming a happy tune these days.

USGS
December 7, 1997

The Hayward Fault is still the most dangerous earthquake fault in the San Francisco Bay area, according to U.S. Geological Survey scientists who will present the results from their latest research on that fault at the annual meeting of the American Geophysical Union, in San Francisco this week.