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
Image: California Brown Pelicans
June 11, 2009

California Brown Pelicans

Birds found in and around the Salton Sea, California.

Attribution:
Image: Snowy Egret, Great Blue Heron and Brown Pelican
June 11, 2009

Snowy Egret, Great Blue Heron and Brown Pelican at the Salton Sea

Birds found in and around the Salton Sea, California.

Attribution:
April 30, 2009

PubTalk 4/2009 — SOILS, CARBON, and Global exCHANGE

by Jennifer Harden, USGS Soil Scientist 

 

  • Studying Arctic Changes during the International Polar Year
  • Why soils aren't just for growing crops
  • What does carbon have to do with global weather and climate?
  • Balancing tradeoffs between the carbon cycle, econoic concerns, and the environment
  • Making choices
A bottomfish with small, bright spots lazily swims over a rocky seafloor among a few small pieces of kelp.
April 21, 2009

Kelp Greenling in Half Moon Bay

Kelp greenling fish, about 8 inches long, swims above a seafloor of mixed gravel, cobble, and rock near Half Moon Bay, California.

Image: Black-necked Stilt and American Avocet
April 18, 2009

Black-necked Stilt and American Avocet

Birds found in and around the Salton Sea, California.

Attribution:
March 26, 2009

PubTalk 3/2009 — Can our Western Forests Take the Heat?!

Climatic change and the future of forests in the western United States

By Philip van Mantgem, Ecologist

  • Tree death rates have more than doubled over the last few decades in old-growth forests of our western states, possibly reflecting increasing temperatures, with potentially serious consequences for wildlife, fire risks, and
February 26, 2009

PubTalk 2/2009 — Petroleum in the Arctic

Geology, Climate, and National Interests

By Donald L. Gautier, Geologist

 

  • For better or worse, technological advances and diminishing opportunities elsewhere make the Arctic increasingly attractive to oil and gas exploration. Retreating polar ice, shifting ecosystems, and heightened development potential are vital issues to the
February 19, 2009

PubTalk 2/2009 — A lecture by Martha A. Sandweiss on her latest book

Passing Strange: A Gilded Age Tale of Love and Deception Across the Color Line"

By Martha Sandweiss, Princeton University

 

  • After leading one of the four great surveys of the western U.S., Clarence King was appointed to be the first Director of the U.S. Geological Survey in 1879. For thirteen years he lived a double
January 29, 2009

PubTalk 1/2009 — Exploring Mars: Geology, Climate Change, Past Life

By Michael H. Carr, USGS Astrogeologist

 

  • Data from a recent polar lander, two still active rovers
    and three spacecraft in orbit are changing our
    perceptions about how Mars evolved. What do 
    these new data imply for the prospects of past and present life?
A map of ShakeOut scenario shaking in southern California
December 31, 2008

A map of ShakeOut scenario shaking in southern California

A map of ShakeOut scenario shaking in southern California.

Shaded relief map (shades of gray) of part of Berkeley, Calif, including locations of Hayward Fault and Cal stadium
December 31, 2008

Lidar shaded relief map of the Hayward Fault and UC Berkeley stadium

A filtered vertical laser image, taken using a technique called light detection and ranging (LIDAR), of part of the Hayward Fault (red lines) in the City of Berkeley. The fault passes through the University of California Berkeley football stadium (left), and past earthquake movements have significantly offset Hamilton Gulch (center). Arrows show relative movement on

...
2 side-by-side maps showing amount of ground shaking in 1868 & 1989 earthquakes. Yellow is light shaking. Reds are stronger shak
December 31, 2008

ShakeMaps for the 1868 Hayward Quake and the 1989 Loma Prieta Quake

ShakeMap showing the inferred intensity of ground shaking in the 1868 earthquake (measured as MMI, or Modified Mercalli Intensity), compared to a ShakeMap for the 1989 magnitude 6.9 Loma Prieta earthquake. Red lines are major earthquake faults; black line shows the portion of the Hayward Fault that ruptured in 1868; diamonds show locations of damage reports (1868) and

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Filter Total Items: 988
USGS science for a changing world logo
April 24, 2002

While it is known that pre-Columbian peoples of North America used fire as a tool to manage natural resources, scientists have long debated the impact of this usage of fire on the landscape. 

USGS
April 24, 2002

While it is known that pre-Columbian peoples of North America used fire as a tool to manage natural resources, scientists have long debated the impact of this usage of fire on the landscape.

USGS science for a changing world logo
February 25, 2002

Above the water it’s a rugged shoreline and a few jagged rocks adorned with bird droppings. Below the surface, however, the Gulf of the Farallones, west of the Golden Gate Bridge, encompasses an area of 4,000 square miles of sea floor, marine life and mysterious objects that may be affecting the area’s environment.

USGS
February 25, 2002

Above the water it’s a rugged shoreline and a few jagged rocks adorned with bird droppings. Below the surface, however, the Gulf of the Farallones, west of the Golden Gate Bridge, encompasses an area of 4,000 square miles of sea floor, marine life and mysterious objects that may be affecting the area’s environment.

USGS science for a changing world logo
February 6, 2002

The United States and the People’s Republic of China share a common problem ? elevated nitrate concentrations in water supplies used for drinking water, according to a recently released report by the U.S. Geological Survey (USGS). While elevated concentrations of nitrate in water have been known to cause illness in babies, there is also indirect evidence that they can cause cancer. 

USGS science for a changing world logo
January 30, 2002

University of Utah seismologists will be on duty around-the-clock during the Olympics, armed with a new $1.2 million system so they can quickly supply public safety information if any disruptive earthquakes shake the 2002 Winter Games.

USGS science for a changing world logo
December 13, 2001

There is science and there is spirit. Sometimes the two twine at apt times. So it is that, in the spirit of an ancient, but ageless Santa Claus, the General Grant Tree-- officially designated in 1926 as the Nation’s Christmas tree by President Calvin Coolidge -- just keeps getting younger.

USGS science for a changing world logo
December 13, 2001

 

Stress changes produced by the 1906 San Francisco earthquake had a profound effect on Bay Area seismicity by dramatically reducing it in the 20th century, according to David Schwartz, of the U.S. Geological Survey in Menlo Park, Calif.

USGS
December 13, 2001

Stress changes produced by the 1906 San Francisco earthquake had a profound effect on Bay Area seismicity by dramatically reducing it in the 20th century, according to David Schwartz, of the U.S. Geological Survey in Menlo Park, Calif. 

USGS
December 13, 2001

Nearly 300 scientists from the U.S. Geological Survey will present papers and posters describing their earth-science research, during the annual meeting of the American Geophysical Union (AGU), at the Moscone Convention Center in San Francisco, December 10 – 14. 

USGS
December 13, 2001

There is science and there is spirit. Sometimes the two twine at apt times. So it is that, in the spirit of an ancient, but ageless Santa Claus, the General Grant Tree-- officially designated in 1926 as the Nation’s Christmas tree by President Calvin Coolidge -- just keeps getting younger.

USGS science for a changing world logo
December 10, 2001

Of Alaska’s several-thousand valley glaciers, including nearly 700 that are named, fewer than 20 are advancing, according to a major study that U.S. Geological Survey (USGS) scientist Bruce F. Molnia will present at the American Geophysical Union Annual 2001 Fall Meeting, scheduled for Dec. 10-14 in San Francisco, CA.