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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.

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Image of a beach made by stacking many video frames together, to give a sense of change in a static image.

Santa Cruz Main Beach video camera dark image

Video camera dark image at Main Beach in Santa Cruz, California, looking eastward. Learn more about the cameras and how we're using them to study coastal change.

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Kincade Fire

Winds exceeding 100 miles per hour spread California’s Kincade Fire at an alarming rate. The fire started on October 23, 2019, and had burned 74,324 acres just north of Santa Rosa, CA, by the evening of October 28.

The European Space Agency’s Sentinel-2A  satellite captured an image of the fire on October 27. Strong wind from the northeast is evident as smoke

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This dark image shows changes in pixels in a video image over 10 minutes.

Santa Cruz Cowells Beach video camera variance image

Video camera variance 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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Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon...

Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon...

Tree Kill Area near Horseshoe Lake at Mammoth Mountain where carbon dioxide in the soil is suffocates the trees.

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.

Glacial moraine along McGee Creek that has been offset about 15-17 ...

Glacial moraine along McGee Creek that has been offset about 15-17 ...

This site is about 5 km (3 mi) south the Long Valley Caldera. For scale, note cars in the parking lot at lower left. The Hilton Creek Fault is much larger than suggested by this relatively small offset--its scarp in places is about 1,100 m (3,600 f) tall and forms part of the eastern front of the Sierra Nevada. The displacement shown here has only occurred since the

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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.

Image of the front page of Sound Waves, July - Aug. 2012
March 22, 2019

Sound Waves, July - Aug. 2012

The stories in the July - Aug. 2012 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2012/08/

USGS Scientists Study an Oil-Spill-Mitigation Sand Berm in the Chandeleur Islands, Louisiana 

Collecting Ocean-

Image of a beach made by stacking many video frames together, to give a sense of change in a static image.

Santa Cruz Cowells Beach video camera dark image

Video camera dark 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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