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

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Image of the front page of Sound Waves, Sept. - Oct. 2011
March 22, 2019

Sound Waves, Sept. - Oct. 2011

The stories in the Sept. - Oct. 2011 issue of Sound Waves:


High-Resolution Multibeam Mapping of Mid-Atlantic Canyons to Assess Tsunami Hazards 

USGS Scientists Develop System for

Hydrothermal system and water flow in the subsurface beneath Long V...

Hydrothermal system and water flow in the subsurface beneath Long V...

Hydrothermal system and water flow in the subsurface beneath Long Valley Caldera, California. Cartoon Illustration from USGS FS 2007-3045.

Image: California Condor

California Condor

California condors are one of the most endangered birds in North America. In the early 1990s, captive-bred condors were reintroduced into the wild in California. As of January 2010, about 190 condors now live in the wild and more reintroductions are being considered. To facilitate this, USGS researchers are assisting Fish and Wildlife Service in its condor research program

Attribution: Ecosystems
Image of the front page of Sound Waves, Aug. 2011
March 22, 2019

Sound Waves, Aug. 2011

The stories in the Aug. 2011 issue of Sound Waves:


USGS Arctic Ocean Research: A Polar Ocean Acidification Study

Three-Week Expedition Images Sediments Beneath the Gulf of Alaska

CalVO's Stuart Wilkinson skis out to a remote seismic instrument in...

Monitoring Seismicity in the Long Valley

CalVO's Stuart Wilkinson skis out to a remote seismic instrument in the Long Valley volcanic region to perform routine maintenance.

California Wildfires

Satellites have captured views of the numerous major fires burning in California.
An image acquired on November 9, 2018, from NASA’s MODIS sensor on the Terra satellite shows smoke pouring out of two major fires, the Camp Fire and the Woolsey Fire, which both ignited the day before.
In the north, the Camp Fire quickly became the deadliest wildfire in the state’s

Filter Total Items: 932
January 3, 1997

The floods have crested and are beginning to recede in most places in the Pacific Northwest. Nevertheless dozens of U.S. Geological Survey personnel, who were busy over the holidays measuring the high streamflows and keeping river stage monitors operating, are still busy in the field and in their offices. Field crews have been hampered by mudslides, road closures, and extremely dangerous condition

December 18, 1996

The good news is that sea water and wave action aren’t being too rough on some sections of the beach cliffs of the San Mateo County, Calif., coast; the bad news is that slumping caused by fresh water erosion is destroying some of the beach cliffs at rates of up to two meters per year, according to scientists with the U.S. Geological Survey in Menlo Park, Calif.

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. 

November 8, 1995

Where in the United States are Carmen and San Diego? Now, you can get fast and accurate information on the Internet about Carmen, San Diego, and almost 2 million other domestic geographic names, via the new World Wide Web site for the U.S. Geological Survey’s Geographic Names Information System.

October 2, 1995

Land subsidence, a potential geological hazard throughout most of California’s valleys, is the subject of a two-day symposium in Sacramento, Calif., that will honor one of the pioneers in California geology and groundwater studies.

October 2, 1995

Joseph F. Poland, whose memory will be honored with a special symposium at this year’s annual meeting of the Association of Engineering Geologists and the Groundwater Resources Association of California in Sacramento, Calif., Oct. 2-8, was a pioneer in the field of engineering geology and one of the world’s leading scientists associated with the United States Geological Survey.