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.

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December 9, 2010

PubTalk 12/2010 — Forecasting Volcanic Eruptions in Alaska

-- the contrasting stories of two recent spectacular eruptions

by Stephanie Prejean, USGS Alaska Volcano Observatory

 

  • Alaskan volcanoes erupt frequently and violently. However each eruption is preceded by a unique set of geophysical precursors.
  • Eruptions of Redoubt and Kasatochi volcanoes highlight the
Attribution: Region 11: Alaska
November 18, 2010

PubTalk 11/2010 — Silicon, Software, and Science

Monitoring the Earth's Landscape with Low-Cost High-Tech

by Rian Bogle, Remote Sensing Specialist

 

  • The USGS is one of the world's largest providers of remote sensing data, employing the best tools and techniques to expand our knowledge of the Earth.
  • Working with low-cost field and aerial imaging technologies,
While standing next to a dune buggy parked next to a groundwater well in the sand dunes, a hydrologist prepares equipment
November 9, 2010

Water Quality Sampling, Imperial Sand Dunes, California

A USGS Hydrologist purges a groundwater monitoring well in preparation for water-quality sampling in the Imperial Sand Dunes Recreation area, Imperial Valley, California.  This sampling was done as part of the Forecasting Total Dissolved Solids Concentrations of Groundwater from the Lower Colorado Water Supply Project study.

Hilly sand dunes with brush dotting a flat area in the middle
November 9, 2010

Imperial Sand Dunes Recreation Area

The Imperial Sand Dunes Recreational Area, located in Imperial County in the far southeast corner of California. It is home to a groundwater well field that is part of the U.S. Bureau of Reclamation's Lower Colorado Water Supply Project.

October 28, 2010

PubTalk 10/2010 — Dam Removal in the Pacific Northwest

- a new tool for river restoration

by Jonathan Warrick, Research Geologist

 

  • Dams provide water supply, power generation and flood control, but they have finite life spans and can disrupt river and coastal ecosystems.
  • Removal of two large dams on the Elwha River of Washington in 2011 will be the largest dam
September 30, 2010

PubTalk 9/2010 — Great Missoula & Ice Age Floods Natl. Geologic Trail

- a journey through the landscape of Earth's greatest floods

by Richard Waitt, Geologist

 

  • Glacial Lake Missoula released scores of cataclysmic floods, sculpting the bizarre landscape of Washington's Channeled Scabland
  • New video depicts the enormous 3-day flood releasing 500 cubic miles of water
Pinecone with tightly closed scales attached near the top of a pine tree.
September 17, 2010

Closed lodgepole pinecone

A closed lodgepole pinecone on a tree in the Sierra Nevada.

August 26, 2010

PubTalk 8/2010 — Invasives and Wildfires in the West

New Crossroads in Science, Policy, and Management

by Julio Betancourt, Sr. Scientist and Desert Ecologist

  • Exponential spread of non-native grasses is a pressing environmental issue in American Deserts
  • Invasive grasses increased fuel continuity and large wildfires in desert scrub that previously experienced little or no
Image: Low-density Waterfowl in California Wetlands
August 1, 2010

Low-density Waterfowl in California Wetlands

Waterfowl in California can spread the avian influenza virus (AIv) during summertime when wetland temperatures are warm and waterfowl densities are low.

Researchers with the USGS and partners found low pathogenic (LP) AIv in water and waterfowl fecal samples collected in the California Central Valley during summer, indicating on-going infections in resident

...
Attribution: Ecosystems
Image: Low-density Waterfowl in California Wetlands
August 1, 2010

Low-density Waterfowl in California Wetlands

Waterfowl in California can spread the avian influenza virus (AIv) during summertime when wetland temperatures are warm and waterfowl densities are low.

Researchers with the USGS and partners found low pathogenic (LP) AIv in water and waterfowl fecal samples collected in the California Central Valley during summer, indicating on-going infections in resident

...
Attribution: Ecosystems
July 29, 2010

PubTalk 7/2010 — Looking Down On Our Planet

New satellite imagery reveals a changing global surface

by Ron Beck, USGS Land Remote Sensing Program

 

  • Nearly 40 years of USGS satellite imagery shows dramatic changes earth's surface features
  • Changing patterns of land use are seen in urban growth, clear cutting of amazon forests, and surface mining
June 24, 2010

PubTalk 6/2010 — Monterey Canyon - Superhighway to the Deep-Sea

USGS-MBARI Cooperative Oceanographic Research

By Charles K. Paull, Senior Scientist Monterey Bay Aquarium Research Institute, Moss Landing, CA 

 

  • Monterey Bay provides a diverse 4,000 meter-deep "laboratory" for both biologists and geologists
  • Ocean studies are providing critical information on climate change,
Filter Total Items: 973
USGS science for a changing world logo
December 4, 2003

In a first of its kind study U.S. Geological Survey (USGS) and Duke University seismologists have used tiny "microearthquakes" along a section of California’s notorious San Andreas Fault to create unique images of the contorted geology scientists will face as they continue drilling deeper into the fault zone to construct a major earthquake "observatory.

USGS
December 4, 2003

In a first of its kind study U.S. Geological Survey (USGS) and Duke University seismologists have used tiny "microearthquakes" along a section of California’s notorious San Andreas Fault to create unique images of the contorted geology scientists will face as they continue drilling deeper into the fault zone to construct a major earthquake "observatory."

USGS science for a changing world logo
November 24, 2003

Despite tremendous technological advances in earthquake seismology, many fundamental mysteries remain. The critical question of whether earthquakes will ever be predictable continues to plague seismologists — in part because there is no way to directly observe what goes on miles below the surface where earthquakes occur.

USGS
November 24, 2003

Despite tremendous technological advances in earthquake seismology, many fundamental mysteries remain. The critical question of whether earthquakes will ever be predictable continues to plague seismologists — in part because there is no way to directly observe what goes on miles below the surface where earthquakes occur.

USGS science for a changing world logo
November 20, 2003

Guided by Japanese writings from an era of shoguns, an international team of scientists today reported new evidence that an earthquake of magnitude 9 struck the northwestern United States and southwestern Canada three centuries ago. The findings are likely to affect the region’s precautions against future earthquakes and tsunamis.

USGS science for a changing world logo
November 3, 2003

The report, "Teetering on the edge or too late? Conservation and research issues for avifauna of sagebrush habitats," was published in the November issue of the international peer-reviewed science journal The Condor and reviews the problems facing sagebrush habitats and the challenges facing native birds that depend on this habitat for survival.

USGS science for a changing world logo
October 30, 2003

With the loss of life and property being experienced in the fires that have burned out of control in four Southern California counties, research by the U.S. Geological Survey on fire in the region reveals that to effectively manage fires to help prevent loss of life and property in Southern California shrublands, it is essential to understand the natural role of fire in chaparral ecosystems.

USGS
October 30, 2003

With the loss of life and property being experienced in the fires that have burned out of control in four Southern California counties, research by the U.S. Geological Survey on fire in the region reveals that to effectively manage fires to help prevent loss of life and property in Southern California shrublands, it is essential to understand the natural role of fire in chaparral ecosystems.

USGS science for a changing world logo
September 29, 2003

Young desert tortoises in the western Mojave Desert are at risk of predation by common ravens, both from non-breeding ravens living in large flocks around human developments and from nesting pairs scattered more evenly across the desert landscape,

USGS
September 29, 2003

Young desert tortoises in the western Mojave Desert are at risk of predation by common ravens, both from non-breeding ravens living in large flocks around human developments and from nesting pairs scattered more evenly across the desert landscape.

USGS
September 25, 2003

A single strand of rope separates threatened western snowy plovers from people recreating on the public beach of Coal Oil Point Reserve, at the University of California, Santa Barbara. Although these small, 6-inch shorebirds had seemingly abandoned this site for breeding, after the 400-yard nursery was protected, it fledged 39 young snowy plovers this summer.

USGS science for a changing world logo
September 23, 2003

A single strand of rope separates threatened western snowy plovers from people recreating on the public beach of Coal Oil Point Reserve, at the University of California, Santa Barbara. Although these small, 6-inch shorebirds had seemingly abandoned this site for breeding, after the 400-yard nursery was protected, it fledged 39 young snowy plovers this summer.