Is there a list of the largest landslides in the world?

See the list of Catastrophic Landslides of the 20th Century - Worldwide.

The five largest Worldwide Landslides are:

  • 1911 - Tadzhik Republic - 2,000,000,000 cubic meters of material - 54 killed
  • 1919 - Indonesia - 185 square kilometers of material - 5,110 killed
  • 1920 - China - unknown volume - 100,000 killed 
  • 1921 - Kazakh Republic - unknown volume - 500 killed
  • 1933 - China - 150,000,000 cubic meters of material - 6,800 killed

The largest landslide in the United States was in Alaska during the 1964 M9.2 Great Alaska earthquake.

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What should I know about wildfires and debris flows?

Wildland fires are inevitable in the western United States. Expansion of human development into forested areas has created a situation where wildfires can adversely affect lives and property, as can the flooding and landslides that occur in the aftermath of the fires. There is a need to develop tools and methods to identify and quantify the...

How do landslides cause tsunamis?

Tsunamis are large, potentially deadly and destructive sea waves, most of which are formed as a result of submarine earthquakes. They can also result from the eruption or collapse of island or coastal volcanoes and from giant landslides on marine margins. These landslides, in turn, are often triggered by earthquakes. Tsunamis can be generated on...

Under what circumstances do U.S. Geological Survey landslide personnel conduct field work in landslide-prone areas?

USGS landslide researchers have ongoing field projects in several areas of the United States, including parts of the Pacific coastal ranges, Rocky Mountains, and the Appalachians. USGS scientists also respond to major landslide events, including some that result in federally-declared disasters. In some cases, USGS scientists respond to landslides...

Can major landslides and debris flows happen in all areas of the U.S.?

Landslides can and do occur in every state and territory of the U.S.; however, the type, severity and frequency of landslide activity varies from place to place, depending on the terrain, geology, and climate. Major storms have caused major or widespread landslides in Washington state, Oregon, California, Colorado, Idaho, Hawaii, Virginia, Ohio,...

What was the biggest landslide in the world?

The largest landslide on Earth in recorded history occurred during the 1980 eruption of Mount St. Helens , a volcano in the Cascade Mountain Range in the State of Washington, USA. The volume of material was 0.67 cubic miles (2.8 cubic kilometers) and the landslide traveled about 14 miles down the North Fork Toutle River. Average landslide depth...

What is the difference between a landslide advisory, a landslide watch, and a landslide warning?

An advisory is a general statement about the potential of landslide activity in a given region relative to developing rainfall predictions. An advisory may include general statements about rainfall conditions that can lead to debris-flow activity, and list precautions to be taken in the event of heavy rainfall. A watch means that landslide-...

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...

Do human activities cause landslides?

Yes, in some cases human activities can be a contributing factor in causing landslides. Many human-caused landslides can be avoided or mitigated. They are commonly a result of building roads and structures without adequate grading of slopes, poorly planned alteration of drainage patterns, and disturbing old landslides. Detailed on-site...

Why study landslides?

Landslides are a serious geologic hazard common to almost every State in the United States. As people move into new areas of hilly or mountainous terrain, it is important to understand the nature of their potential exposure to landslide hazards, and how cities, towns, and counties can plan for land-use, engineering of new construction and...

What is a landslide and what causes one?

A landslide is defined as the movement of a mass of rock, debris, or earth down a slope. Landslides are a type of "mass wasting," which denotes any down-slope movement of soil and rock under the direct influence of gravity. The term "landslide" encompasses five modes of slope movement: falls, topples, slides, spreads, and flows. These are further...
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Date published: July 20, 2017

Landslide Assistance from the Air

The USGS uses cutting edge technologies to investigate and forecast landslides and other natural hazards.

Date published: May 27, 2017

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.

Date published: November 4, 2016

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.

Date published: July 28, 2015

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.

Date published: October 13, 2005

Protecting Communities from Landslides

New report identifies best practices for protecting communities

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New Zealand Landslides
December 31, 2016

New Zealand Landslides

Photograph showing landslides covering State Route 1 near Ohau Point. The route was impacted my several landslides and is the main north-south highway on the eastern part of the South Island of New Zealand.

As many as 80,000 landslides occurred as the result of a magnitude 7.8 earthquake in New Zealand in November of 2016. The earthquake and landslides caused

Oso landslide. Huge swath of mountain missing.
December 31, 2014

Oso landslide

Oso landslide 2014

Attribution: Natural Hazards
Image: 2014 Landslide in Washington State
March 24, 2014

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.

Digital Elevation Map of Mount St. Helens pre and post 1980
September 21, 2012

Digital Elevation Map of Mount St. Helens pre and post 1980

The shaded relief image was produced from LIDAR data. LIDAR is an acronym for Light Detection and Ranging, a modern remote sensing technique used to map topography very accurately—more so than is possible with older techniques. The crater is 1.2 miles (1.9km) wide east-west. Elsewhere the scale varies owing to the oblique viewing angle. The landslide deposit includes the

May 9, 2012

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

Landslide monitoring station with the San Gabriel mountains in the background, post wildfire with no vegetation
December 31, 2009

Landslide monitoring site

Original rainfall and telemetry station established after the 2009 Station Fire, CA.

Image: 2005 Landslide in La Conchita, CA
January 10, 2005

2005 Landslide in La Conchita, CA

On January 10, 2005, a landslide struck the community of La Conchita in Ventura County, California, destroying or seriously damaging 36 houses and killing 10 people. For a USGS rerpot on this event, please see USGS Open-file report, "Landslide Hazards at La Conchita, California."

Attribution: Natural Hazards
Image: Coastal Landslide Caused by the 2010 Haiti Earthquake

Coastal Landslide Caused by the 2010 Haiti Earthquake

Earthquake-triggered landslide on south coast of Haiti near village of Nan Diamant.

Attribution: Natural Hazards
Image: Landslides in Limestone, Haiti

Landslides in Limestone, Haiti

This photo shows a landslide that deposited disaggregated limestone fragments in river valley.

Attribution: Natural Hazards