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California

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Aerial view west across the upper part of Medicine Lake Volcano tow...

Aerial view west across the upper part of Medicine Lake Volcano tow...

Medicine Lake lies within the shallow basin of Medicine Lake caldera. Glass Mountain flow, draped over the east side of the volcano, is the youngest lava flow at the volcano. The northeasternmost dacite tongue extends nearly to the bottom of the photo (distal lobes are outlined to enhance visibility).

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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Image: Suisun Slough, California

Suisun Slough, California

A small slough in Suisun Slough in the Suisun Bay, California.

Generalized regional geologic map emphasizing the location, extent, and ages of large volcanic centers including those in Lassen

Generalized regional geologic map emphasizing the location

Generalized regional geologic map emphasizing the location, extent, and ages of large volcanic centers including those in Lassen Volcanic National Park and vicinity, California.

Image: A Fire Tornado Swirls Near a Home in Southern California

A Fire Tornado Swirls Near a Home in Southern California

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

A fire tornado swirls near a home in southern California. USGS is investigating the factors that dictate home loss from wildfires as part of the USGS Southern California Wildfire Risk Scenario Project.

Image courtesy of Tim Walton, Photo One Productions, CALFIRE. Shared with permission.

Small red cinder cone erupted on top of Mammoth Crest, viewed from ...

Small red cinder cone erupted on top of Mammoth Crest, viewed from ...

The red basaltic cone was erupted on top of Mammoth Crest, and an accompanying lava flow spilled 200-300 m down the steep slope below the cone. The cone erupted between 126,000 and 64,000 years ago.

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

Santa Cruz Cowells Beach video camera bright image

Video camera bright 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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Simplified map of Long Valley Caldera showing several field stops i...

Long Valley Caldera showing several field stops in blue

Simplified map of Long Valley Caldera showing several field stops in blue.

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

Sound Waves, Aug. 2011

The stories in the Aug. 2011 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2011/08/

USGS Arctic Ocean Research: A Polar Ocean Acidification Study

Three-Week Expedition Images Sediments Beneath the Gulf of Alaska

Horseshoe Lake, Mammoth Mountain, California (Google Earth image) w...

Horseshoe Lake, Mammoth Mountain, CA (Google Earth image) with area...

Horseshoe Lake, Mammoth Mountain, California (Google Earth image) with area of elevated carbon dioxide degassing measurements from 2012 in rainbow colors (highest amount in purple to normal in blue).