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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Mount Konocti viewed from Cinder Cone, Clear Lake Volcanic Field.
December 31, 1905

Mount Konocti viewed from Cinder Cone, Clear Lake Volcanic Field.

Mount Konocti, the most distinct volcanic feature of the Clear Lake Volcanics as viewed to the west from Cinder Cone.

old black and white photo of collapsed building, with inset image of the building before collapse
December 31, 1868

Alameda County Courthouse (Calif.) before and after 1868 Earthquake

Strong shaking during the 1868 Hayward Fault earthquake caused the second story of the Alameda County Courthouse in San Leandro to collapse (photo courtesy of the Bancroft Library, University of California). The inset photo shows the courthouse before the quake

Delta Smelt being held in hand
January 1, 0000

Delta Smelt

Delta Smelt being held in hand

A view from atop a coastal bluff looking at a sandy beach, waves, and ocean.

Sunset Beach Camera 2 Snapshot

Video camera snapshot at Sunset State Beach in Watsonville, California, looking north. Learn more about the cameras and how we're using them to study coastal change.

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This dark image shows changes in pixels in a video image over 10 minutes.

Santa Cruz Cowells Beach video camera variance image

Video camera variance 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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Whiskeytown National Recreation Area Post-fire Recovery

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

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A view from atop a coastal bluff looking at a sandy beach, waves, and ocean.

Sunset Beach Camera 1 Timex

Video camera timex (time-exposure) image at Sunset State Beach in Watsonville, California, looking northwest. Learn more about the cameras and how we're using them to study coastal change.

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This image shows the brightest pixel values captured during 10 minutes of video.

Santa Cruz Main Beach video camera bright image

Video camera bright image at Main Beach in Santa Cruz, California, looking eastward. Learn more about the cameras and how we're using them to study coastal change.

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Whiskeytown National Recreation Area Post-fire Recovery

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

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