USGS Frequently Asked Questions

Question: What was the biggest landslide in the world?

Answer:

The world’s biggest historic landslide 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 2.8 km3

Sources of Information:

(1). Please see the USGS Cascades Volcano Observatory website for more information on Mount St. Helens and other volcanoes: http://vulcan.wr.usgs.gov/home.html

(2). Schuster, Robert L., and Lynn M. Highland, 2001, Socioeconomic Impacts of Landslides in the Western Hemisphere, U.S. Geological Survey Open-file Report 01-9276. This publication is available on the web: http://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-01-0276/

Source of this FAQ:
http://landslides.usgs.gov/

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