Category Landslides

Rockfall Hazards in Yosemite National Park
Landslides

Rockfall Hazards in Yosemite National Park

Much of the spectacular scenery in Yosemite is a product of glacial erosion followed by rockfalls Article by: Hobart M. King, Ph.D., RPG Yosemite rockfall hazards map: This illustration is part of a rockfall hazard map for Yosemite National Park. It shows recent, historic, and prehistoric rockfall and rockslide areas near some of the busiest sites in the park.

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Landslides

What is a Debris Flow?

Debris flows are extremely dangerous. They can be very fast, travel long distances, and completely fill valleys. Article by: Hobart M. King, Ph.D., RPG Debris flow near Hyderabad, India: The first fifty seconds of this video shows the water being pushed at the front of the flow. At about 0:55, spectators on the opposite side of the stream can see the rocks coming and run for their lives!
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Landslides

Debris Flow Hazards in the United States

Republished from United States Geological Survey Fact Sheet 176-97. Debris flow in Oregon: This debris flow occurred in the Columbia River gorge near the town of Dodson, Oregon, during a rainfall and snowmelt event in February 1996 (Photo Inset: S. Cannon, USGS). The combination of rainfall and snowmelt resulted in severe flooding and landsliding throughout the Pacific Northwest.
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Landslides

The Saidmarreh Landslide

This ancient landslide in Iran moved about five cubic miles of material. Saidmarreh Landslide: Landsat image of Saidmarreh Landslide in Saidmarreh, Iran. The source area of the slide is bounded on the southwest by the crest of the Kabir Kuh anticline. Debris from the slide travelled down the flank of the anticline, across the Karkheh River and continued across the valley floor.
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Landslides

Rockfall Hazards in Yosemite National Park

Much of the spectacular scenery in Yosemite is a product of glacial erosion followed by rockfalls Article by: Hobart M. King, Ph.D., RPG Yosemite rockfall hazards map: This illustration is part of a rockfall hazard map for Yosemite National Park. It shows recent, historic, and prehistoric rockfall and rockslide areas near some of the busiest sites in the park.
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Landslides

Spectacular Rockfall in Yosemite National Park

A photo sequence of a rockfall and debris avalanche from August 6th, 2006 by Herb Dunn On August 6th, 2006 Herb Dunn was sitting on a rock along the Merced River in Yosemite National Park. He was taking photos and enjoying a great summer day. He had just taken a photo of Elephant Rock. Suddenly he heard a loud POP.
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Landslides

Landslide Hazard Information

Landslides cause fatalities and billions of dollars in property damage each year. Adapted from United States Geological Survey Fact Sheet 2004-3072. Landslide Incidence / Susceptibility Map Landslide Map: This map shows the distribution of relative landslide incidence and susceptibility across the conterminous United States.
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