How many deaths result from landslides each year?
An average of 25-50 people are killed by landslides each year in the United States. The worldwide death toll per year due to landslides is in the thousands. Most landslide fatalities are from rock falls, debris-flows, or volcanic debris flows (called lahars).
Twenty three people were killed, at least 167 injured, and more than 400 homes were damaged by a series of debris flows that impacted the California community of Montecito in Santa Barbara County on January 9, 2018. The debris flows were triggered by heavy rain that fell on steep hillsides that had been burned by the Thomas Wildfire, which at that time was the largest wildfire in California history.
Learn more:
- USGS Landslide Hazards
- Debris-Flow Forecasts Before Wildfires
- Post-Fire Debris Flows
- The Landslide Handbook - A Guide to Understanding Landslides
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THRESH—Software for tracking rainfall thresholds for landslide and debris-flow occurrence, user manual
Precipitation thresholds are used in many areas to provide early warning of precipitation-induced landslides and debris flows, and the software distribution THRESH is designed for automated tracking of precipitation, including precipitation forecasts, relative to thresholds for landslide occurrence. This software is also useful for analyzing...
Baum, Rex L.; Fischer, Sarah J.; Vigil, Jacob C.
The 3D Elevation Program—Landslide recognition, hazard assessment, and mitigation support
The U.S. Geological Survey (USGS) Landslide Hazards Program conducts landslide hazard assessments, pursues landslide investigations and forecasts, provides technical assistance to respond to landslide emergencies, and engages in outreach. All of these activities benefit from the availability of high-resolution, three-dimensional (3D) elevation...
Lukas, Vicki; Carswell, Jr., William J.
Real-time monitoring of landslides
Landslides cause fatalities and property damage throughout the Nation. To reduce the impact from hazardous landslides, the U.S. Geological Survey develops and uses real-time and near-real-time landslide monitoring systems. Monitoring can detect when hillslopes are primed for sliding and can provide early indications of rapid, catastrophic movement...
Reid, Mark E.; LaHusen, Richard G.; Baum, Rex L.; Kean, Jason W.; Schulz, William H.; Highland, Lynn M.
The Landslide Handbook - A Guide to Understanding Landslides
This handbook is intended to be a resource for people affected by landslides to acquire further knowledge, especially about the conditions that are unique to their neighborhoods and communities. Considerable literature and research are available concerning landslides, but unfortunately little of it is synthesized and integrated to address the...
Highland, Lynn M.; Bobrowsky, Peter
Video documentation of experiments at the USGS debris-flow flume 1992–2017
This set of videos presents about 18 hours of footage documenting the 163 experiments conducted at the USGS debris-flow flume from 1992 to 2017. Owing to improvements in video technology over the years, the quality of footage from recent experiments generally exceeds that from earlier experiments.Use the list below to access the individual videos...
Logan, Matthew; Iverson, Richard M.
Landslide Hazards - A National Threat
Landslides occur and can cause damage in all 50 States. Severe storms, earthquakes, volcanic activity, coastal wave attack, and wildfires can cause widespread slope instability. Landslide danger may be high even as emergency personnel are providing rescue and recovery services. To address landslide hazards, several questions must be considered...
Southern California landslides-an overview
Southern California lies astride a major tectonic plate boundary defined by the San Andreas Fault and numerous related faults that are spread across a broad region. This dynamic tectonic environment has created a spectacular landscape of rugged mountains and steep-walled valleys that compose much of the region’s scenic beauty. Unfortunately...
Landslide types and processes
Highland, Lynn
Debris-Flow Hazards in the United States
Highland, Lynn; Ellen, Stephenson D.; Christian, Sarah B.; Brown, William M.
Five Years Later - The Oso (SR 530) Landslide in Washington
The Oso (SR 530) Landslide in Washington - Five Years Later
The following is an updated version of a story first published in March of 2015.
Landslide Assistance from the Air
The USGS uses cutting edge technologies to investigate and forecast landslides and other natural hazards.
Huge landslide on California’s Big Sur coast continues to change
The Mud Creek landslide on California’s Big Sur coast keeps eroding.
USGS helping to monitor and assess huge Big Sur landslide
USGS is collecting and analyzing air photos to help monitor a huge landslide that occurred May 20 on California’s Big Sur coast.
Imagery Reveals More Landslides in Western Columbia Gorge
New mapping in the western portion of the Columbia Gorge in Skamania County, Washington, shows previously unrecognized landslides beneath dense forest cover.
EarthView–Landslide Spreads 6 Miles Across Glacier Bay National Park
Two snapshots from Landsat show the extent of a landslide in an Alaska National Park.
Landslides Triggered by Nepal Earthquakes
MENLO PARK, Calif. — A new report from the U.S. Geological Survey provides critical landslide-hazard expertise to Nepalese agencies and villages affected by the April 25, magnitude 7.8 earthquake that shook much of central Nepal.
PubTalk 10/2016 — Rockfalls in California's Sierra Nevada
Rock falls in California’s Sierra Nevada - Pursuing explanations for exfoliation and seemingly spontaneous fracture of rock
A volcano monitoring “spider” deployed to the Oso landslide
A volcano monitoring “spider” was deployed by helicopter to the Oso landslide to track ground movement and seismicity while search-and-rescue operations were ongoing. The spider was equipped with a seismometer (mounted on the far left leg) to track ground shaking and GPS (a dome-shaped instrument on the upper mast) to track subtle ground movement. Data was transmitted
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2014 Landslide in Washington State
Photograph from an aerial survey showing the extent and impacts from the landslide in northwest Washington that occurred on March 22, 2014. The survey was conducted by the Washington State Department of Transportation, Washington State Department of Natural Resources, USGS, and King County Sheriff's Office.
Volcano Web Shorts 2: Debris Flows
Debris flows are hazardous flows of rock, sediment and water that surge down mountain slopes and into adjacent valleys. Hydrologist Richard Iverson describes the nature of debris-flow research and explains how debris flow experiments are conducted at the USGS Debris Flow Flume, west of Eugene, Oregon. Spectacular debris flow footage, recorded by Franck Lavigne of the
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Landslide at La Conchita, California
Landslide at La Conchita, California
2008 Landslide Near Hongyan Resort, China
The May 12, 2008, Great Sichuan Earthquake, also called the Wenchuan Earthquake, occurred at 14:28 local time, in Sichuan Province, China. The earthquake magnitudes were Mw = 7.9 (USGS), Ms = 8.0 (Chinese Earthquake Administration). The epicenter was 80 km west-northwest of Chengdu, the capital city of Sichuan province. Damage by earthquake-induced landslides was
...
Earthquake and Landslides in the Union of the Comoros
A magnitude 4.8 earthquake struck the island of Anjouan in the Union of the Comoros on March 12, 2014. Heavy rainfall trigger landslides and damages were incurred to buildings, roads, and water supplies. As a precaution, more than 3,000 citizens living below the landslides were moved to a refugee camp. The USGS and the OFDA with USAID are providing support and research
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Coastal Landslide Caused by the 2010 Haiti Earthquake
Earthquake-triggered landslide on south coast of Haiti near village of Nan Diamant.
Landslides in Limestone, Haiti
This photo shows a landslide that deposited disaggregated limestone fragments in river valley.