Unified Interior Regions


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
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
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.

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.

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.

Filter Total Items: 975
December 16, 1996

A new method of assessing the danger of ground failure due to soil liquefaction during an earthquake made its debut in San Francisco, Tuesday afternoon, December 17.

December 13, 1996

"Secrets in Stone," a video that chronicles the series of scientific discoveries in the early 1960s that led to broad acceptance of the theory of plate tectonics, will be shown for the first time on Tuesday, December 17, 1996, at the annual meeting of the American Geophysical Union (AGU) in San Francisco. The premiere showing will be held at 4:30 p.m., in Room 122 of the Moscone Center.

September 27, 1996

Dr. Crofton B. Farmer of Pasadena, California, and Dr. M. Patrick McCormick of Hampton, Virginia, have received the 1996 Pecora Award, one of the top federal awards for contributions in remote sensing.