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: 1,113
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.

Soil-temperature measurement at Hot Creek in Long Valley Caldera, C...
August 17, 2009

Soil-temperature measurement at Hot Creek in Long Valley Caldera, CA.

Soil-temperature measurement at Hot Creek in Long Valley Caldera, California.

July 30, 2009

PubTalk 7/2009 — Restoring California's "Inland Sea"

Status of efforts to restore the Salton Sea

by Lee Case, Chief Scientist, USGS Salton Sea Science Office 

 

  • The Salton Sea is California's largest lake and has a surface elevation about 230 feet below sea level
  • The Salton Sea is a terminal lake - it has no outlets, inflows are principally from agricultural
water discharging from a well along the All-American Canal
July 28, 2009

All-American Canal

The All-American Canal in Imperial County, California near the border of Arizona and Mexico. Water discharging from well LCWSP2 can be seen on the far side of the canal.

Image: California Cliffs and Coastline
July 1, 2009

California Cliffs and Coastline

Colorful vegetated clifftop near Half Moon Bay, California.

Attribution: Water Resources
Forster Tern standing
June 30, 2009

Forster's Tern Attraction Tape

A sample of the audio file of Forster's tern colony calls that will be broadcast to attract breeding terns to islands in south San Francisco Bay.

Marine terraces in California
June 30, 2009

Marine Terraces near Santa Cruz, CA

Marine terraces North of Santa Cruz, California.  For information on terrace formation https://pubs.er.usgs.gov/publication/fs20183002 

June 25, 2009

PubTalk 6/2009 — Tracking Mercury from Ore to Organism

Mercury Cycling and Bioaccumulation In a Mine-Dominated Ecosystem

By Tom Suchanek, USGS Western Ecological Research Center

 

  • Nearly 300 abandoned mercury mines and prospects are found in the California Coast Range-- the Sulphur Bank Mercury Mine at Clear Lake, CA is one of them
  • Clear Lake is one of the most
GPS station mounded on a tripod next to a groundwater well in the desert
June 18, 2009

Groundwater Monitoring, Imperial County, California

Recording location and water-level data at a groundwater monitoring site in the Imperial Sand Dunes Recreation area, Imperial County, California. The work is being done as part of a water quality and groundwater system characterization study along the All-American Canal that runs through the area.

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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. 

USGS science for a changing world logo
July 24, 2002

It’s 2 in the morning, about a mile off the coast of Redwood National and State Parks in Humboldt County, California, near the northernmost part of the state. In the pitch-black night, researchers talk quietly while they wait aboard the RV Coral Sea, a 90-foot Humboldt State University research vessel.

USGS
July 24, 2002

It’s 2 in the morning, about a mile off the coast of Redwood National and State Parks in Humboldt County, California, near the northernmost part of the state. In the pitch-black night, researchers talk quietly while they wait aboard the RV Coral Sea, a 90-foot Humboldt State University research vessel.

USGS science for a changing world logo
July 3, 2002

 

When USGS scientist Dr. Kevin Lafferty visits a salt marsh at low tide, he sees much more than algae-green tinted mudflats, tidal sloughs and brine-adapted pickleweed. Like other visitors, he sees the bustle of life around the mudflats from clams, snails, and crabs, to shorebirds and long-legged waders, and gobies and killifish in the shallows of the estuary.

USGS
July 3, 2002

When USGS scientist Dr. Kevin Lafferty visits a salt marsh at low tide, he sees much more than algae-green tinted mudflats, tidal sloughs and brine-adapted pickleweed.

USGS science for a changing world logo
June 24, 2002

An international research team announced Monday it has begun drilling a 1.4-mile-deep hole along the San Andreas Fault near the Central California town of Parkfield - site of one of the longest ongoing earthquake experiments in the world.