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Preliminary Evaluation of a Precipitation Threshold for Anticipating the Occurrence of Landslides in the Seattle, Washington, Area

By Alan F. Chleborad

U.S. Geological Survey Open-File Report 03-463


Version 1.0


Precipitation-induced landslides are a significant, recurring problem in the Seattle area. Major landslide events have been costly. Heavy precipitation at the end of December 1996 and in January and March of 1997 produced hundreds of landslides that resulted in loss of life and millions of dollars of damage (Baum and others, 1998; Coe and others, 2000; Laprade and others, 2000). Damage to City of Seattle facilities alone exceeded $34 million (Pageler, 1998).

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