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California

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Map of the Inyo explosion craters, lava flows.

Map of the Inyo craters, lava flows

Map of the Inyo explosion craters, lava flows, and faults that formed about 600 years ago.

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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Image of the front page of Sound Waves, April - May 2011
March 22, 2019

Sound Waves, April - May 2011

The stories in the April - May 2011 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2011/04/

Connecting Marshes to the Sea—Sediment in the Shallows of San Francisco Bay 

Birders Urged to Help Track the California

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.

Dark image of a coastal area shows standard deviation of pixel density for 10 minutes, brighter areas mean more movement.

Sunset State Beach Video Camera 2 Variance Image

Variance image from video camera along Sunset State Beach in Watsonville, CA, looking north. This variance image shows the standard deviation of pixel intensity throughout a 10-minute video sequence. Learn more about the cameras and how we're using them to study

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Hydrothermal system and water flow in the subsurface beneath Long V...

Hydrothermal system and water flow in the subsurface beneath Long V...

Hydrothermal system and water flow in the subsurface beneath Long Valley Caldera, California. Cartoon Illustration from USGS FS 2007-3045.

Image: California’s Hotter Drought and Tree Death

California’s Hotter Drought and Tree Death

California's hotter drought has already killed millions of trees, particularly in low-elevation forests.