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

California Wildfires

Satellites have captured views of the numerous major fires burning in California.
An image acquired on November 9, 2018, from NASA’s MODIS sensor on the Terra satellite shows smoke pouring out of two major fires, the Camp Fire and the Woolsey Fire, which both ignited the day before.
In the north, the Camp Fire quickly became the deadliest wildfire in the state’s

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Image: Southern California's Fire Landscape

Southern California's Fire Landscape

A screenshot from the USGS film "Living with Fire".

USGS is investigating ways to balance community fire risk management and native habitat conservation as part of the USGS Southern California Wildfire Risk Scenario Project, analyzing both human factors and natural factors.

Fire images courtesy of Tim Walton, Photo One Productions, CALFIRE. Shared with

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Lassen Peak viewed from the south at the summit of Brokeoff Volcano...

Lassen Peak viewed from the south at the summit of Brokeoff Volcano...

Lassen Peak viewed from the south at the summit of Brokeoff Volcano, Lassen Volcanic National Park.

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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