Unified Interior Regions

Lassen Peak's Devastated Area photographed from the air in 1994.

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.

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

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

TNMCorps Mapping Challenge: Fire Stations in CA, NV, AZ as of 02/04/21

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

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.