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Barry Arm of Harriman Fjord, Alaska

The U.S. Geological Survey is supporting the monitoring efforts in the Barry Arm fjord in Alaska.

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Big Sur, California Landslide

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National Landslide Preparedness Act

enacted January 3, 2021

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Landslide Guide for Puerto Rico

in Spanish and English

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Landslide Science and Preparedness

Learn about landslides and debris flows

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Landslide Hazards

The primary objective of the National Landslide Hazards Program is to reduce long-term losses from landslide hazards by improving our understanding of the causes of ground failure and suggesting mitigation strategies.

Barry Arm, Alaska Landslide and Tsunami Monitoring

Columbia River Gorge Landslides

a pile of large boulders and tree parts up against a guardrail next to a road

This new geonarrative (Esri story map) summarizes the landslide history, hazards, and the debris flows that have occurred in the Columbia River Gorge.

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Postfire debris flow hazards—Tips to keep you safe

tan pickup truck surrounded by mud and rocks up to the top of the door

A new bilingual (English and Spanish) factsheet to help you prepare for a debris flow.

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Quick Links

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Columbia River Gorge Landslides - New Interactive Geonarrative

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Announcement: Subduction Zone Science Workshop - January 10–11, 2023

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The Monitor Newsletter - Vol. 9 | Issue November 2022

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Publications

Landslides triggered by the 2002 M 7.9 Denali Fault earthquake, Alaska, USA

The 2002 M 7.9 Denali earthquake in Alaska, USA, was the largest inland earthquake in North America in nearly 150 years. The earthquake involved oblique thrusting but mostly strike-slip motion, and faults ruptured the ground surface over 330 km. Fault rupture occurred in a rugged, mountainous, subarctic environment with extensive permafrost and variable glaciation, geology, and groundwater presenc
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Natural Hazards, Landslide Hazards, Geologic Hazards Science Center

Postfire debris flow hazards—Tips to keep you safe

Often referred to as “mudflows,” debris flows are a type of landslide made up of a rapidly moving mixture of dirt, rocks, trees, and water (and sometimes ash) that start on a hillside and travel downvalley. They can easily overflow channels and severely damage houses, vehicles, or other structures. Areas burned by wildfires are especially susceptible to these hazards, which can be triggered by sto
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Natural Hazards, Water Resources, Emergency Management, Landslide Hazards, Geologic Hazards Science Center, New Mexico Water Science Center

Landslides triggered by the August 14, 2021, magnitude 7.2 Nippes, Haiti, earthquake

The August 14, 2021, magnitude 7.2 Nippes, Haiti, earthquake triggered thousands of landslides on the Tiburon Peninsula. The landslides directly caused fatalities and damage and impeded response efforts by blocking roads and causing other infrastructure damage. Adverse effects of the landslides likely will continue for months to years. This report presents an assessment of potential postearthquake
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Natural Hazards, Earthquake Hazards, Landslide Hazards, Geologic Hazards Science Center, International Programs
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Science

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a pile of large boulders and tree parts up against a guardrail next to a road

Columbia River Gorge Landslides

Extreme rainfall during two atmospheric river events in January 2021 and January 2022 triggered a series of debris flows in the Columbia River Gorge, Oregon. The flows had significant impacts, including multiple highway closures and one fatality. This story map highlights rainfall data and observations of debris flow deposits by the Oregon Department of Geology and Mineral Industries (DOGAMI)...
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Natural Hazards, Landslide Hazards, Geologic Hazards Science Center
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Columbia River Gorge Landslides

Extreme rainfall during two atmospheric river events in January 2021 and January 2022 triggered a series of debris flows in the Columbia River Gorge, Oregon. The flows had significant impacts, including multiple highway closures and one fatality. This story map highlights rainfall data and observations of debris flow deposits by the Oregon Department of Geology and Mineral Industries (DOGAMI)...
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map of landslide locations

Interactive U.S. Landslide Data Maps

Interactive U.S. Landslide Data Maps with access to GIS data.
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Natural Hazards, Landslide Hazards, Landslide Hazards
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Interactive U.S. Landslide Data Maps

Interactive U.S. Landslide Data Maps with access to GIS data.
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Damaged house surrounded by rocks, trees, and mud

Cameron Peak, Colorado, Fire: Flooding and Debris Flows - July 20, 2021

On Thursday, August 13, 2020, at approximately 1:45 PM MDT, the Cameron Peak fire was reported in steep, rugged terrain 15 miles southwest of Red Feather Lakes, Colorado, near Cameron Pass. The fire spread rapidly due to extreme temperatures, strong winds, and high fuel loads. The largest wildfire in Colorado history, the Cameron Peak fire burned 845 square kilometers (sq km) on the Arapaho and...
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Natural Hazards, Landslide Hazards
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Cameron Peak, Colorado, Fire: Flooding and Debris Flows - July 20, 2021

On Thursday, August 13, 2020, at approximately 1:45 PM MDT, the Cameron Peak fire was reported in steep, rugged terrain 15 miles southwest of Red Feather Lakes, Colorado, near Cameron Pass. The fire spread rapidly due to extreme temperatures, strong winds, and high fuel loads. The largest wildfire in Colorado history, the Cameron Peak fire burned 845 square kilometers (sq km) on the Arapaho and...
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