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: 974
Image of the front page of Sound Waves, June 2011
March 22, 2019

Sound Waves, June 2011

The stories in the June 2011 issue of Sound Waves:


International Team Studies Tsunami Deposits in Japan to Improve Understanding and Mitigation of Tsunami Hazards 

USGS Scuba

This image shows the brightest pixel values captured during 10 minutes of video.

Santa Cruz Cowells Beach video camera bright image

Video camera bright image at Cowells Beach in Santa Cruz, California, looking southward. Learn more about the cameras and how we're using them to study coastal change.

Image of the front page of Sound Waves, April - May 2011
March 22, 2019

Sound Waves, April - May 2011

The stories in the April - May 2011 issue of Sound Waves:


Connecting Marshes to the Sea—Sediment in the Shallows of San Francisco Bay 

Birders Urged to Help Track the California

Image of the front page of Sound Waves, Sept. - Oct. 2012
March 22, 2019

Sound Waves, Sept. - Oct. 2012

The stories in the Sept. - Oct. 2012 issue of Sound Waves:


USGS Scientists Exploring Mars as Part of NASA’s Mars Science Laboratory 

“Where Am I?”—High-Resolution Digital

Santa Cruz Main Beach, El Nino

Photographs are of the Santa Cruz Main Beach before and after the December 11, 2014, “Super Soaker” storm that brought 2.5 inches of rain in just a few hours to Santa Cruz and 9 inches to Boulder Creek, along with big waves and swell. While the human eye may notice changes to the beach, ground-based lidar can create surface maps of precise elevation changes over time.

Image of a beach made by stacking many video frames together, to give a sense of change in a static image.

Santa Cruz Main Beach video camera dark image

Video camera dark image at Main Beach in Santa Cruz, California, looking eastward. Learn more about the cameras and how we're using them to study coastal change.

Image of the front page of Sound Waves, March 2011
March 22, 2019

Sound Waves, March 2011

The stories in the March 2011 issue of Sound Waves:


Japan Lashed by Powerful Earthquake, Devastating Tsunami

Long-Lived, Slow-Growing Corals in Deep Waters of the Gulf of Mexico

Mount Konocti, a 1,312 m (4,305 ft) mountain on the eastern shore o...

Mount Konocti, a 1,312 m (4,305 ft) mountain on the eastern shore o...

Mt. Konocti erupted during the most recent stage of volcanism (01. Ma to 10,000 years ago), and a future eruption from the same site would be devastating to the nearby inhabitants.

View of a bridge over a river

Eel River at Fernbridge, CA

This webcam is located at the USGS streamgaging station on Eel River at Fernbridge. This station provides continuous monitoring of river stage. The webcam provides valuable information to the National Weather Service, first-responders, and area residents to evaluate real-time conditions in the creek

Filter Total Items: 932
August 5, 1998

The Earth Science Information Center (ESIC), which is the map sales outlet for the U.S. Geological Survey in Menlo Park, will be closed from August 31 through September 18, to facilitate moving the operation into a newly remodeled building on the USGS campus at 345 Middlefield Road in Menlo Park.

August 3, 1998

The race against extinction for turtles, tortoises and terrapins is the subject for the August 27 free public lecture sponsored by the U.S. Geological Survey. The lecture will begin at 7 p.m. in the Menlo Park City Council Chambers, at 701 Laurel St., Menlo Park.

July 28, 1998

The exotic species of plant and animal life that have invaded San Francisco Bay are the topic of this Thursday’s free public lecture, sponsored by the U.S. Geological Survey in Menlo Park.

July 1, 1998

Life at the Bottom of San Francisco Bay is a world of emigrants versus the natives, as exotic species replace and react to native species and alter the biotic balance of the Bay ‘s food chain. The history and effects of the exotic invaders is the subject of the U.S. Geological Survey ‘s free public lecture, Thursday, July 30, 7 p.m., at the Menlo Park City Council Chambers, 701 Laurel St., Menlo P

June 30, 1998

The fabled waters of Lake Tahoe may soon become clearer as U.S. Geological Survey (USGS) scientists make plans to map the mysterious floor of the lake, using the ocean exploration technology known as "multi- beam bathymetry." 

June 22, 1998

Gasoline-related compounds were found in water samples from Lake Tahoe by U.S. Geological Survey scientists during the July through September 1997 boating season. MTBE (methyl tert -butyl ether), a gasoline additive, was found in non-toxic concentrations throughout the lake, as deep as 90 feet. 

June 10, 1998

Visitors to the U.S. Geological Survey’s exhibit booth at the Monterey Bay Oceans Fair will be able to "feel the bay," by squishing different types of San Francisco Bay muds through their fingers, view microscopic critters that live in those muds, and view maps of the seafloor, at the fair, from noon to 8 p.m., Friday, June 12, 1998, in Monterey, Calif.

June 5, 1998

Residents of the San Jose area who would like to become partners with the USGS in monitoring earthquake activity in the Santa Clara Valley this summer can become part of that project by offering space in their backyards to the USGS.

June 5, 1998

The Lake Tahoe Data Clearinghouse, a virtual, web-based project, providing everything from digital maps of the lake and surrounding basin to notes from recent presidential forum meetings, is now on line at http://blt.wr.usgs.gov/

April 21, 1998

The U.S. Geological Survey has released a series of reports on results of a five-year study on, the quality of water in 20 major basin regions throughout the nation, including the San Joaquin-Tulare Basins, which cover most of central California and are a major source or drinking water for most of the State’s population. The report, "Water-Quality in the San Joaquin-Tulare Basins, California) 1992

April 15, 1998

A news conference to explain the post-El Nino aerial survey that is being conducted along the Pacific coast is scheduled for 1 p.m., Thursday, April 16, at the Delmonte Jet Center, adjacent to the Monterey Peninsula Airport, on the east side of Monterey.

April 10, 1998

Properly assessing the impacts of powerful storms associated with El Nino which have brought unprecedented erosion to the United States’ west coast is an enormous task. NASA , the U. S. Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA) are combining efforts to provide public officials with the tools they need to accurately assess coastal erosion.