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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Image: Assessing the Health of a Sugar Pine in California

Assessing the Health of a Sugar Pine in California

USGS biologists assess the health of a sugar pine, one of tens of  thousands of individual trees whose fates have been tracked annually throughout the drought in California.

Attribution: Land Resources
Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon...

Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon...

Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon dioxide in the soil is suffocates the trees.

Glacial moraine along McGee Creek that has been offset about 15-17 ...

Glacial moraine along McGee Creek that has been offset about 15-17 ...

This site is about 5 km (3 mi) south the Long Valley Caldera. For scale, note cars in the parking lot at lower left. The Hilton Creek Fault is much larger than suggested by this relatively small offset--its scarp in places is about 1,100 m (3,600 f) tall and forms part of the eastern front of the Sierra Nevada. The displacement shown here has only occurred since the

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Image of the front page of Sound Waves, May - June 2012
March 22, 2019

Sound Waves, May - June 2012

The stories in the May - June 2012 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2012/06/

Gas Hydrates and Climate Warming—Why a Methane Catastrophe Is Unlikely 

Real-Time Mapping of Seawater and Atmospheric

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.

Little Borax Lake, along the western shore of Clear Lake, Californi...

Little Borax Lake, along the western shore of Clear Lake, CA, is a ...

The lake formed after an eruption occurred through a landslide deposit on the southeastern shore of the lake. Little Borax Lake is presently in the center of Buckingham Golf Course on the northern slope of Mount Konocti.

Icon made to look like a zipper on piece of paper is being unzipped, with the word ZIP at the bottom of the paper.
January 1, 2014

CoSMoS Southern California flooding hazard scenarios

ZIP file (3.6 MB) contains three files when uncompressed: 

  • an essential readme.txt file and
  • model projections of two Southern California flooding hazard scenarios:
     - ARkStorm, and
     - January 2010 El Niño and Sea-Level Rise.

For more information, see

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.

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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.