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: 1,120
June 28, 2007

PubTalk 6/2007 — Adventures in Southwest Geology

Exploring the colorful southern Colorado Plateau in 3-D

By Philip Stoffer, Geologist

Take a colorful tour with the help of 3-D photography through some of the region's highlights:

  • A plethora of parklands- Petrified Forest, Chaco Canyon, Wupatki, Grand Canyon
  • High desert climate changes, past, present, and
May 31, 2007

PubTalk 5/2007 — Alchemy in the Abyss

Probing the mysteries of deep-ocean minerals

By James R. Hein, Marine Geologist

  • Since President Reagan in 1983 extended U.S. mineral rights 200 nautical miles offshore, interest in deep-sea mining has increased
  • Massive sulfide deposits form rapidly at very hot ephemeral vents..black smokers. and .white smokers.
  • Slow-
April 26, 2007

PubTalk 4/2007 — Shock Waves

How the 1906 earthquake shook up California and science

A presentation of the award-winning USGS Video Shock Waves introduced by David Schwartz, Earthquake Geologist 

  • The 46-minute film Shock Waves includes dramatic historical footage, colorful animations, and interviews with earthquake experts
  • Shock Waves received
March 22, 2007

PubTalk 3/2007 — Impact!

Piecing together the story of a giant meteorite crater beneath the Atlantic coast

By David S. Powars, Geologist, and R.D. Catchings, Geophysicist

  • Buried under Chesapeake Bay is a very well preserved impact structure 56 miles across and more than 2 miles deep
  • Following clues from drill holes and seismic imagery, careful
Drill Rig Tender staged for departure from Lone Pine, California
March 20, 2007

Drill Rig Tender staged for departure from Lone Pine, California.

Drill Rig Tender staged for an early morning departure from Lone Pine after drilling a multiple-completion groundwater-monitoring well in Centennial Flats for the Bureau of Indian Affairs.

February 22, 2007

PubTalk 2/2007 — Riding the Storm

Landslide Danger in the Bay Area Hills

Peter Lyttle, National Landslide Hazards Program Coordinator,
will introduce the USGS premiere of the documentary
Riding the Storm by Karen Adams. A question-and answer session
with the producer, USGS researchers, and residents
featured in Riding the Storm will follow.

January 25, 2007

PubTalk 1/2007 — The Hidden World of the Golden Gate

How tides, currents, and humans have created an array of sea-floor features

By Patrick Barnard, Marine Geologist, and Peter Dartnell, Physical Scientist

  • A century of technical advances allow scientists to identify and visualize spectacular sea-bottom features
  • Recent collaborative research outside the Golden Gate found that 100
The California Aqueduct
December 31, 2006

Aqueducts move water in the past and still today, as in California

Aqueducts move water - today and in ancient times

Be it 2,000 years ago in ancient Rome, Italy or today in California, aqueducts were and are essential to get water from a place where it exists in ample supply to where it is scarce. Aqueducts aren't a high-tech modern invention—the ancient Romans had aqueducts to bring water from the mountains above

An oblique illustration of the floor of a bay as if all the water has been drained out.
December 31, 2006

Multibeam bathymetry of San Francisco Bay

A multibeam bathymetric survey that produced unprecedented high resolution images of the mouth of San Francisco Bay was conducted in 2004 and 2005. The survey, performed over forty-four days by the Seafloor Mapping Lab at California State University, Monterey Bay, consisted of 1,138 track lines, 1.1 billion soundings, and covered an area of 154 km2 (60 mi2

Photo of SBCC wells looking east
December 14, 2006

San Bernardino, Cone Camp Multiple-depth Monitoring Well Sites

Looking east towards USGS Site ID: 340541117074401-6, Site Name: 001S002W07Q001S-6S, Local name: SBCC 1-6 in San Bernardino County, California.

December 14, 2006

PubTalk 12/2006 - Mojave

Title: The Mojave National Preserve: Geology and Water Shape Desert Plant Communities 

  • One of the largest units in the National Park System, the Mojave National Preserve was established in 1994
  • The Preserve encompasses great sand dunes (including "singing sands"), young volcanic features, forests of Joshua trees, and fields of
December 14, 2006

PubTalk 12/2006 — The Mojave National Preserve

Geology and Water Shape Desert Plant Communities

by David Miller, Geologist and John Nimmo, Soil Hydrologist


  • One of the largest units in the National Park System, the Mojave National Preserve was established in 1994
  • The Preserve encompasses great sand dunes (including "singing sands"), young volcanic features,
Filter Total Items: 980
November 20, 2000

Reporters are invited to attend the first national conference on fire ecology, prevention and management. Participants and speakers include federal, state and local fire specialists, researchers, and managers, as well as fire researchers and managers from nongovernmental organizations and universities. 

October 26, 2000

An earth-science project that will enable scientists to assess more accurately earthquake hazards and underground water resources in the western Santa Clara Valley area of Los Gatos-Campbell, is now underway. 

September 26, 2000

In a report released today, the U.S. Geological Survey (USGS) has documented elevated levels of mercury in bass and catfish in the Bear and South Yuba River watersheds in the Sierra Nevada of northern California. Mercury is a well-known environmental pollutant that can have serious effects on human health.

September 8, 2000

Drilling of a 1000-foot-deep ground-water monitoring well will get underway in San Jose, Thursday, September 14. 

August 2, 2000

Hailed as the world’s largest water management effort, the CALFED Bay-Delta Program, a partnership between the state of California and the federal government, has announced the assignment of Dr. Samuel N. Luoma, a scientist with U.S. Geological Survey (USGS), as the Interim Science Leader of the CALFED Science Program.

July 9, 2000

Drilling of a 1400-foot-deep, multi-port ground-water monitoring well will get underway in west Long Beach, Monday, July 10.

June 25, 2000

U.S. Geological Survey Director, Dr. Charles ’Chip’ Groat, will deliver the keynote address at Monday’s opening session of the 20th annual user conference of the Environmental Systems Research Institute (ESRI), at the San Diego Convention Center.

June 21, 2000

In response to the Cerro Grande/Los Alamos wildfire, the U.S. Geological Survey has entered into an agreement with the U.S. Army Corps of Engineers to establish a streamflow gage and collect water-quality data from the Rio Grande upstream from Cochiti Reservoir to determine the effects of the fire upon the water system.

June 9, 2000

The spring 2000 survey of 2,317 California sea otters indicates an overall increase by 10.9 percent since the 1999 spring survey of 2,090 individuals.

May 2, 2000

By combining techniques developed by Leonardo da Vinci with today’s computer applications, an artist and two scientists at the U.S. Geological Survey in Menlo Park, Calif., have produced one of the most dramatic and beautiful maps of the United States, ever published.

April 24, 2000

A report summarizing suspended-solids concentrations in San Francisco Bay from October 1997 through September 1998 has been published by the U.S. Geological Survey.

April 21, 2000

A rare opportunity to watch as waterfowl biologists track northern pintail ducks is available by visiting a U.S. Geological Survey website called "Discovery for Recovery."