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California

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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.

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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 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

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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Wes Hildreth at Long Valley Caldera...

Wes Hildreth at Long Valley Caldera

Wes Hildreth is an expert when it comes to studying the Long Valley Caldera. Here, he is standing on Tertiary basalt lava flows on the north rim of the caldera, view to the southeast with Lake Crowley visible in the center of the caldera, and McGee Mountain above the lake on the skyline.

Aerial view of Inyo Craters and Deer Mountain.

Inyo Craters and Deer Mountain.

Aerial view of Inyo Craters and Deer Mountain, California.

Image: Seismic station,  USGS Northern California Seismic Network

Seismic station, USGS Northern California Seismic Network

Traditional seismic stations such as this one require a source of power (solar here), a poured concrete foundation and several square feet of space. They are not always practical to install in urban areas, and that's where NetQuakes comes in.