Landslide Hazards
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. Explore and search below.
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How Often Do Rainstorms Cause Debris Flows in Burned Areas of the Southwestern U.S.?
Debris flows, sometimes referred to as mudslides, mudflows, lahars, or debris avalanches, are common types of fast-moving landslides. They usually start on steep hillsides as a result of shallow landslides, or from runoff and erosion that liquefy and accelerate to speeds in excess of 35 mi/h. The consistency of debris flows ranges from thin, watery to thick, rocky mud that can carry large items...
National Landslide Preparedness Act
On January 5, 2021 the National Landslide Preparedness Act (P.L. 116-323) was signed into law; it authorized a national landslide hazards reduction program and a 3D elevation program within the USGS. This broadened the already existing Landslide Hazards Program under the Natural Hazards Mission Area, and the 3D Elevation Program under the National Geospatial Program and required additional...
Big Sur Landslides
On California’s Big Sur coast, the steep slopes at Mud Creek suffered a catastrophic collapse (May 20, 2017). On January 28, 2021, heavy rains from a two-day storm caused debris from fire-scarred slopes to wash out another section of road at Rat Creek. USGS scientists are monitoring this 100-mile section of the California coastline, in collaboration with the CA Department of Transportation.
Toro Negro, Puerto Rico Landslide Monitoring Station
Recent Monitoring Data
Seattle, Washington Landslide Monitoring Site
Recent monitoring data.
Portland, Oregon Landslide Monitoring Site
Recent Monitoring Data
U.S. Highway 50, CA Landslide Monitoring Site
Recent Monitoring Data
