Rainfall intensification amplifies exposure of American Southwest to conditions that trigger postfire debris flows
Improving Postfire Debris-Flow Hazard Assessments In The Pacific Northwest Through Application Of Debris-Flow Models
2022 Chaos Canyon Landslide in Colorado:
Insights revealed by seismic analysis, field investigations, and remote sensing
Insights revealed by seismic analysis, field investigations, and remote sensing
Landslide Hazards Program
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.
Landslide Basics
Landslide Basics
What is a landslide? Where do they happen and what causes them? Learn all about the basics of landslides here.
U.S. and Puerto Rico Landslide Hazard Map
U.S. and Puerto Rico Landslide Hazard Map
New high-resolution map of landslide susceptibility for the entire U.S. and Puerto Rico.
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News
New USGS map shows where landslides are most likely to occur in U.S.
New USGS map shows where landslides are most likely to occur in U.S.
Un nuevo mapa del USGS muestra dónde es más probable que ocurran deslizamientos de tierra en el país
Un nuevo mapa del USGS muestra dónde es más probable que ocurran deslizamientos de tierra en el país
Publications
RegionGrow3D: A deterministic analysis for characterizing discrete three-dimensional landslide source areas on a regional scale
Regional-scale characterization of shallow landslide hazards is important for reducing their destructive impact on society. These hazards are commonly characterized by (a) their location and likelihood using susceptibility maps, (b) landslide size and frequency using geomorphic scaling laws, and (c) the magnitude of disturbance required to cause landslides using initiation thresholds. Typically, t
Debris-flow entrainment modelling under climate change: Considering antecedent moisture conditions along the flow path
Debris-flow volumes can increase along their flow path by entraining sediment stored in the channel bed and banks, thus also increasing hazard potential. Theoretical considerations, laboratory experiments and field investigations all indicate that the saturation conditions of the sediment along the flow path can greatly influence the amount of sediment entrained. However, this process is usually n
Assessing locations susceptible to shallow landslide initiation during prolonged intense rainfall in the Lares, Utuado, and Naranjito municipalities of Puerto Rico
Hurricane Maria induced about 70 000 landslides throughout Puerto Rico, USA, including thousands each in three municipalities situated in Puerto Rico's rugged Cordillera Central range. By combining a nonlinear soil-depth model, presumed wettest-case pore pressures, and quasi-three-dimensional (3D) slope-stability analysis, we developed a landslide susceptibility map that has very good performance
Science
2024 Pedersen Lagoon Landslide-Generated Tsunami
A landslide produced a tsunami in Pedersen Lagoon, southwest of Seward, Alaska on Wednesday, August 7th, 2024, at approximately 04:55 AKDT / 12:55 UTC. Preliminary surveying indicates that the landslide generated a tsunami of 17 meters high (approx. 56 ft) or more in Upper Pedersen Lagoon, reducing to about one meter high (approx. 3 feet) in Lower Pedersen Lagoon. Runup heights reported here are...
Landslide Basics
Landslides occur in all 50 states and territories and they affect lives, property, infrastructure, and the environment. Understanding when, where, and how landslides occur can help to reduce the risk of living with these natural hazards.
Improving Postfire Debris-Flow Hazard Assessments In The Pacific Northwest Through Application Of Debris-Flow Models
As part of the Post-fire Hazards and Impacts to Resources and Ecosystems (PHIRE): Support for Response, Recovery, and Mitigation Project, the PHIRE Debris Flow Hazard team is engaging in several studies to better understand the spatial and temporal drivers of postfire debris flows and improve postfire hazard assessments across northern California and the Pacific Northwest.
