The down slope movement of earth material under the influence of gravity.
Cascades Volcano Observatory - Mount St. Helens real-time hydrologic monitoring [ More info] Real-time and historic data from gaging stations for water and mudflow detection in the Mount St. Helens, WA vicinity with data tables and plots, interactive location map and station descriptions.
Costly landslide events in the United States: map layer description file [ More info] GIS data set from the USGS National Landslides Hazards Program showing major landslide events in the United States and Puerto Rico with metadata. Map layer can be downloaded in shapefile format or SDTS format.
Debris-Flow Hazards within the Appalachian Mountains of the Eastern United States [ More info] Storms bring rains strong enough to cause rock-falls and landslides that are hazardous to people. Includes examples in the eastern US with information about the weather events that precipitated the debris flows.
Field reconnaissance report of landslides triggered by the January 12, 2010, Haiti earthquake [ More info] Preliminary aerial helicopter reconnaissance of areas affected by landslides and ground inspections at some accessible landslide sites.
Geologic hazards team [ More info] An organizational unit within USGS that studies earthquakes, landslides, and geomagnetism. Contact information and descriptions of current research projects.
Geologic hazards: landslide images [ More info] Photographs of examples of landslides viewable online as 100-200kb or 800 x 600kb images.
Landslide Hazards Program [ More info] Research program designed to improve understanding of the causes of ground failure so that the hazards associated with landslides can be mitigated or avoided.
Landslide Hazards in the Seattle, Washington, Area [ More info] Explains how and why landslides occur in this area, and what can be done to forecast and mitigate them.
Landslide events [ More info] Current, regularly updated reports of landslides nationwide
Landslide hazards: Frequently Asked Questions [ More info] Answers to common questions about landslides and the hazards they pose.
Landslide types and processes [ More info] An introductory primer giving basic scientific facts about landslides--the types of landslides, how they are initiated, and how they can begin to be managed as a hazard.
Landslide: did you see it? [ More info] Report your experience of seeing a landslide including location.
Landslides learning & education [ More info] A wide variety of explanatory and educational resources about landslides and their relationship with earthquakes and storms, and preparedness. Includes glossary and photos.
Landslides research [ More info] Description of research projects in progress to make accurate landslide hazard maps and forecasts of landslide occurrences.
Mass Wasting Following the 2002 Missionary Ridge Fire near Durango, Colorado, a Field Trip Guidebook [ More info] Guidebook with photos, maps, and diagrams explaining how forest fires have affected the likelihood of mass wasting, with discussions of steps taken to minimize future impacts.
Mass wasting presentation [ More info] Presentation explaining the various types of mass wasting, how they work, and how they differ from one another, with diagrams and photos.
Mount Rainier - Living Safely With a Volcano in Your Backyard [ More info] One of our Nation's most dangerous volcanoes, Mount Rainier has been the source of countless eruptions and volcanic mudflows, and many people live in the areas that will be affected by it.
Mount St. Helens, 1980 to now--what's going on? [ More info] Summarizes the eruptions of this spectacular volcano and the consequences for the surrounding landscape, explains how volcanoes like this form, and how we monitor their activity to mitigate hazards they pose.
National Landslide Information Center [ More info] National Landslide Information Center links to general information, teacher/student information, recent landslide events, state and local information, current projects, fire-related landslides, and images and publications on landslides.
Natural Hazards - A National Threat [ More info] Describes the role USGS plays in reducing losses from natural disasters, itemizing specific information we develop and maintain to help mitigate or avoid these problems.
Natural Hazards - Landslides [ More info] News and related information focusing on the importance of landslide hazards in the United States.
Natural Hazards Gateway [ More info] News and related information about the importance of seven major types of natural hazards in the United States: earthquakes, floods, wildfires, hurricanes, landslides, volcanoes, and tsunamis.
Natural hazards [ More info] Research and monitoring to provide the Nation with a clear understanding of natural hazards and their potential threats to society, and assists with developing smart, cost-effective strategies for achieving preparedness and resilience.
Progress toward a safer future since the 1989 Loma Prieta earthquake [ More info] Summarizes what we have learned since this serious earthquake and how we have improved our preparedness for events such as this.
Real-time monitoring of landslides [ More info] USGS real-time landslide monitoring provides prompt notification of landslide activity, advances our understanding of landslide behavior, and enables more effective engineering and planning efforts.
Riding the storm -- landslide danger in the San Francisco Bay Area [ More info] Video: Learn what USGS scientists have discovered about landslide dynamics and which slopes are most susceptible to sliding. Hear the devastating stories of Bay Area residents affected by landslides and learn to recognize the danger signs.
San Francisco Bay Region geology [ More info] Gateway to the geology of the San Francisco Bay region with links to geologic maps, paleontology, marine geology, earthquakes, landslides, and geophysics. Includes maps, 3-D models, and photos.
The landslide handbook -- A guide to understanding landslides [ More info] Basic information for homeowners, communities, emergency managers, and decisionmakers. Includes sections on landslide types, evaluation tools, and mitigation techniques.
Types and effects of volcano hazards [ More info] Describes the 6 main types of hazardous activities and processes associated with volcanoes, including tephra, lava flows, pyroclastic flows, lahars (volcanic mudflows), landslides, and volcanic gas.
Alphabetical Index of Topics
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