Unified Interior Regions

California

States L2 Landing Page Tabs

Filter Total Items: 1,141
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

...
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.

A view from atop a building looking at the sandy beach, waves, and ocean.

Cowells Beach Webcam Snapshot

Video camera snapshot at Cowells Beach in Santa Cruz, California, looking southward. Learn more about the cameras and how we're using them to study coastal change.

...
Top of the basalt columns showing the classical hexagonal shapes, f...

Top of the basalt columns showing the classical hexagonal shapes, f...

These glacial striations are carved in the top of a columnar-jointed basalt lava flow. The lava flow was erupted between 200,000 and 100,000 years ago in the Middle Fork of the San Joaquin River valley. The lava flow was then eroded during subsequent glacial periods, as shown by the finely polished and deeply striated surface.

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.

Image of the front page of Sound Waves, June 2011
March 22, 2019

Sound Waves, June 2011

The stories in the June 2011 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2011/06/

International Team Studies Tsunami Deposits in Japan to Improve Understanding and Mitigation of Tsunami Hazards 

USGS Scuba

The timeline and locations for the four periods of volcanism in the...

Four periods of volcanism in the Clear Lake region, CA

The timeline and locations for the four periods of volcanism in the Clear Lake region, California.

Bishop Tuff along 395 between Crowley Lake and Toms Place, Long Val...

Bishop Tuff along 395 Crowley Lake and Toms Place, Long Valley Caldera

Bishop Tuff along 395 between Crowley Lake and Toms Place, Long Valley Caldera, California.

Map showing Medicine Lake volcano lava flows 100,000 years old and ...

Map showing Medicine Lake volcano lava flows 100,000 years old and ...

Postglacial lavas ~13,000 years old and younger are shown in darker pink. Major lava flows are labeled, including anr (andesite of north rim) and asr (andesite of south rim). Five very large basalt lava flows are also labeled: bgc = basalt of Giant Crater, bmc = basalt of Mammoth Crater, byb = basalt of Yellowjacket Butte, bl = Lake Basalt, and bt = basalt of Tionesta.

...