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

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June 6, 2012

PubTalk 6/2012 — Exploring The Valley of Ten Thousand Smokes

-- a Centennial perspective of the Novarupta-Katmai eruption, the largest of the 20th century

By Judy Fierstein, USGS

 

  • 100 years ago on June 6, a 3-day explosive eruption at Novarupta on the Alaska Peninsula created the spectacular Katmai caldera and the Valley of Ten Thousand Smokes, called the eighth wonder of the
Attribution: Region 11: Alaska
May 31, 2012

PubTalk 5/2012 — Restoring the Wild Heart of South San Francisco Bay

--The South Bay Salt Pond Restoration Project

By Laura Valoppi, Lead Scientist

 

  • This is largest Western U.S. coastal wetlands restoration project, encompassing 15,100 acres of former salt ponds around the edge of South San Francisco Bay
  • The project will restore and enhance South Bay wetlands for endangered
April 26, 2012

PubTalk 4/2012 — ShakeAlert!

--building an earthquake early warning system for California

by Doug Given, USGS Earthquake Early Warning Coordinator 

 

  • Millions of Japanese citizens received advance warning of the 2011 magnitude 9.0 Tohoku earthquake -- can such a system be built for use in California?
  • University researchers and government
March 22, 2012

PubTalk 3/2012 — Projected Climate Change Impacts in California

--the consequences of increasing atmospheric greenhouse gases

Tom Suchanek, USGS Western Ecological Research Center Lead Scientist and Climate Change Coordinator

  • How will decisions that the global community makes about emissions likely affect the future of the western U.S.?
  • How will rising sea level likely affect
February 23, 2012

PubTalk 2/2012 — Mapping a Flood...Before it Happens

-- the new USGS FloodPath early warning system

By Marijke van Heeswijk, USGS Hydrologist

 

  • Historically, floods have been the most destructive natural hazard in the Nation
  • The USGS and National Weather Service have developed an early warning system that produces online maps of tomorrow's floods today
January 26, 2012

PubTalk 1/2012 — Lassen Volcanic National Park

--a wonderland of volcanoes and thermal features

By Patrick Muffler, Geologist Emeritus

 

  • Lassen Peak, the southernmost active volcano in the Cascade Range,explosively erupted in 1915, devastating nearby areas and raining volcanic ash as far away as 200 miles to the east
  • Lassen National Park, in addition to
Two women wearing personal protective gear on a boat stand near a mud sampling device and scoop mud from it.
January 24, 2012

Sampling mud with a Smith-Mac

PCMSC scientists Amy Foxgrover (left) and Leticia Hallas collect mud from a Smith-McIntyre grab sampler aboard R/V Parke Snavely to study sediment sources and redistribution within San Francisco Bay.

Toe of the active Cleveland Corral landslide in 2011
December 31, 2011

Cleveland Corral landslide in 2011

Toe of the active Cleveland Corral landslide in 2011, perched above US Highway 50 in distance.  Movement typically only occurs during wet winter and spring months.

Map of facilities along the Colorado River and Yuma Agricultural Area.
December 31, 2011

Map of facilities along the Colorado River and Yuma Agricultural Area.

Location map showing the location of facilities along the Colorado River and Yuma agricultural area adjacent to the United States-Mexico Border (USBR, 2011).

Computer-generated illustration of high-resolution seafloor maps created with data collected.
December 31, 2011

San Diego Trough fault

Bird's-eye view map of a section of the seafloor off southern California, made with depth data. The map shows a channel wall that has been cut by the San Diego Trough fault and moved about 20 meters. This feature is about 1,000 meters below sea level.

All-American Canal winding through the Imperial Sand Dunes
December 31, 2011

All-American Canal

The All-American Canal (AAC) in southern Imperial County, California, has historically been unlined, resulting in substantial losses to seepage. In 2006, the Imperial Irrigation District, under a contract with the United States Bureau of Reclamation, initiated a project to build a concrete-lined canal parallel to 23 miles of the earthen AAC. Construction was completed in

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USGS science for a changing world logo
January 11, 2005

At 6 p.m. Pacific Standard Time, the U.S. Geological Survey advised state and federal agencies about the continuing possibility of landslides and debris flows in seven counties of southern California. The counties are: San Diego, Riverside, Orange, San Bernardino, Ventura, Los Angeles, and Santa Barbara. Here is the advisory that was issued:

USGS
January 11, 2005

At 6 p.m. Pacific Standard Time, the U.S. Geological Survey advised state and federal agencies about the continuing possibility of landslides and debris flows in seven counties of southern California.The counties are: San Diego, Riverside, Orange, San Bernardino, Ventura, Los Angeles, and Santa Barbara. Here is the advisory that was issued:

USGS science for a changing world logo
January 7, 2005

The U.S. Geological Survey today advised state and federal agencies about the continuing possibility of landslides and debris flows in seven counties of southern California due to recent rains, melting snow, and anticipated rain forecasted by the National Weather Service.

USGS
January 7, 2005

The U.S. Geological Survey today advised state and federal agencies about the continuing possibility of landslides and debris flows in seven counties of southern California due to recent rains, melting snow, and anticipated rain forecasted by the National Weather Service.

USGS science for a changing world logo
December 30, 2004

Due to recent heavy rainfall in southern California and the triggering of several debris flows in the mountain ranges west of Los Angeles, the U.S. Geological Survey (USGS) is issuing a landslide advisory for southern California. With the previous rainfall from the recent storms, the slopes in the southern California area are now closer to the conditions conducive to the inception of landslides.

USGS science for a changing world logo
December 30, 2004

The U.S. Geological Survey (USGS) has posted new maps on the Internet showing basins with the greatest potential for producing mudslides as a result of the devastating October fires in Southern California. 

USGS science for a changing world logo
December 30, 2004

Due to recent heavy rainfall in southern California and the triggering of several debris flows in the mountain ranges west of Los Angeles, the U.S. Geological Survey (USGS) is issuing a landslide advisory for southern California.

USGS
December 30, 2004

Due to recent heavy rainfall in southern California and the triggering of several debris flows in the mountain ranges west of Los Angeles, the U.S. Geological Survey (USGS) is issuing a landslide advisory for southern California.

USGS
December 13, 2004

Urban Development and Water Quality: USGS is studying urban basins in the Piedmont of North Carolina to determine the relation between urban development and water quality.

USGS science for a changing world logo
October 25, 2004

The U.S. Geological Survey (USGS) presented the 2004 John Wesley Powell Award to governmental, educational and organizational partners who have worked with the USGS to strengthen The National Map, to teach the importance of remote sensing data, to communicate USGS science, and to provide information to water managers about floods.

USGS science for a changing world logo
September 30, 2004

Calling it "one of the most significant earthquakes in the history of seismology," William Ellsworth, chief scientist for the USGS Earthquake Hazards program in California, today commended efforts to densely instrument the location of the September 28th Parkfield 2004 Earthquake.

USGS
September 30, 2004

Calling it "one of the most significant earthquakes in the history of seismology," William Ellsworth, chief scientist for the USGS Earthquake Hazards program in California, today commended efforts to densely instrument the location of the September 28th Parkfield 2004 Earthquake.