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: 1,116
December 10, 2009

PubTalk 12/2009 — A New Generation of Maps

Topographic Maps for the 21st Century

by Mark DeMulder, Director of the National Geospatial Program

 

  • December 5 marks the 125th Anniversary of the popular USGS topographic map, used by engineers and surveyors, industry, academia, and outdoor enthusiasts for reliably accurate information
  • Starting December 3 the
December 8, 2009

Inside USGS No. 1, Robert Christiansen, Yellowstone

USGS emeritus geologist Robert Christiansen describes his career working on Yellowstone geology from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past including mapping and dating of past super eruptions 2.1 million years ago, 1.3 million years ago and 640,000 years ago.

Attribution: Yellowstone
December 8, 2009

Inside USGS, No. 3, Robert Fournier, Yellowstone

USGS emeritus geologist RobertFournier describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.

Attribution: Yellowstone
November 19, 2009

PubTalk 11/2009 — Geohazards in the Aleutian Islands

Great Earthquakes, Great Waves, and Great Volcanic Explosions!

by Steve Kirby, Geophsicist, and Dave Scholl, Scientist Emeritus

 

  • The Aleutian Islands are discussed with respect to geology, climate change, and the fates of sediments produced by mountain building and glaciation
  • These islands, occupied by maritime
Attribution: Region 11: Alaska
Small silver metal boat with USGS lettering on the side, water is splashing up on the side and a small wake is formed.
November 18, 2009

PCMSC research vessel Parke Snavely

The USGS Pacific Coastal and Marine Science Center, located in Santa Cruz, California, owns and operates the research vessel R/V Parke Snavely to collect data and run surveys.

October 29, 2009

PubTalk 10/2009 — Paddling for a Purpose in a Troubled Sea

Sampling the Salish Sea During Tribal Canoe Journeys

by Eric Grossman, USGS Tribal Journey Science Advisor

 

  • Deteriorating water quality in Puget Sound and the Strait of Georgia is causing population declines in valued species such as salmon, orcas, and a number of sea birds
  • USGS scientists and the Coast Salish
September 24, 2009

PubTalk 9/2009 — Meeting the Challenge of the Loma Prieta Earthquake

by Jack Boatwright, USGS Seismologist

The 1989 Loma Prieta earthquake ended decades of seismic tranquility in the San Francisco Bay region. It was considered then . as well as now . to be a wake-up call for the region to prepare for potentially even more devastating earthquakes. How well is the Bay Area prepared for the next large earthquake?

August 27, 2009

PubTalk 8/2009 — The Future of Geothermal Energy

a discussion of present opportunities and future challenges

by Colin F. Williams, USGS Geophysicist 

  • A new USGS assessment of our Nation.s geothermal resources identifies favorable areas for energy development
  • Can geothermal energy help satisfy the growing need for .clean. energy sources?
  • Seven western states
Hydrologist observes groundwater being pumped from a well in the desert
August 26, 2009

Checking the Hydraulic Connections between a Well and Aquifer

A USGS Hydrologist re-develops a monitoring well to ensure a good hydraulic connection is present between the perforations in the well and surrounding aquifer.  This work was being done as part of a groundwater system characterization and groundwater quality study being conducted along the All-American Canal that runs through the area.

Hydrologist collecting water samples from a large well pipe
August 25, 2009

Water-Quality Sample Collection

A USGS Hydrologist collects water-quality samples as part of a wellbore characterization test at site LCWSP2 of the Forecasting Total Dissolved Solids Concentrations of Groundwater from the Lower Colorado Water Supply Project study.

Hot Creek Gorge viewed upstream toward the southwest; the steep wal...
August 17, 2009

Hot Creek Gorge viewed upstream toward the SW; the steep walls of t...

Hot Creek Gorge viewed upstream toward the southwest; the steep walls of the gorge consist of a single rhyolite lava flow erupted from a vent 4 km (2.5 mi) to the south.

Bubbling Spring, a feature of Hot Creek in the Long Valley Caldera,...
August 17, 2009

Bubbling Spring, a feature of Hot Creek in the Long Valley Caldera,...

Bubbling Spring, a feature of Hot Creek in the Long Valley Caldera, California, occasionally "boils" due to high water temperature.

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USGS
June 6, 2003

Counters tallied a total of 2,505 California sea otters in 2003, 17 percent more sea otters than the total of 2,139 otters in 2002, according to a survey led by the U.S. Geological Survey. Excellent to good counting conditions sped the 2003 census to a near-record time, running May 10-15.

USGS science for a changing world logo
May 15, 2003

Scientists from the U.S. Geological Survey (USGS) and their partners studying the largest on-land earthquake in North America in almost 150 years report new information that will help further safety-planning efforts for future large quakes, according to an article published in the May 16, 2003, edition of the journal Science.

USGS science for a changing world logo
February 24, 2003

The earth has subsided as much as four inches in parts of the Mojave Desert in southern California, according to U.S. Geological Survey (USGS) scientists. 

USGS
February 24, 2003

The earth has subsided as much as four inches in parts of the Mojave Desert in southern California, according to U.S. Geological Survey (USGS) scientists. 

USGS science for a changing world logo
December 19, 2002

 

Following a series of intense rainstorms over the past weekend (Dec.13-17), the annual winter landslide season has begun once again in the San Francisco Bay region. The U.S. Geological Survey (USGS) advises that moisture levels in local soils have now reached the point (soil saturation) that is considered a precondition for future landslide activity in most of the region

USGS
December 19, 2002

Following a series of intense rainstorms over the past weekend (Dec.13-17), the annual winter landslide season has begun once again in the San Francisco Bay region.

USGS science for a changing world logo
December 6, 2002

Standard fare in geology textbooks and school classrooms across the world is that the hot springs, geysers and volcanoes of Yellowstone National Park, Hawaii, Iceland, and many other volcanic regions were "created" by plumes of hot rock that rise from near the Earth’s core. New results from recently published U.S. Geological Survey research hint, astonishingly, that such plumes may not exist.

USGS science for a changing world logo
November 20, 2002

An in-depth analysis of major long-term research on the San Andreas fault indicates that parts of the fault are likely to experience a major temblor sooner than previously believed, including the section near Palm Springs and the San Bernardino-Riverside areas, and the Hayward fault in the Bay Area.

USGS
November 20, 2002

An in-depth analysis of major long-term research on the San Andreas fault indicates that parts of the fault are likely to experience a major temblor sooner than previously believed, including the section near Palm Springs and the San Bernardino-Riverside areas, and the Hayward fault in the Bay Area.

USGS
October 15, 2002

On September 23, pintail 17530’s backpack transmitter beamed a signal from the southwest coast of Alaska to a satellite. She was flying south, 272 days after USGS scientists equipped her with a PTT, or platform transmitter terminal, last winter in California’s Central Valley, where nearly half of North America’s pintails winter.

USGS science for a changing world logo
August 9, 2002

 

John D. Buffington, Western Regional Director for the U.S. Geological Survey (USGS) announced today that Rey Stendell has been named Chief Scientist for the Salton Sea Science Office (SSSO) in La Quinta, California.

USGS
August 9, 2002

John D. Buffington, Western Regional Director for the U.S. Geological Survey (USGS) announced today that Rey Stendell has been named Chief Scientist for the Salton Sea Science Office (SSSO) in La Quinta, California.