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Regional landslide-hazard assessment for Seattle, Washington, USA Regional landslide-hazard assessment for Seattle, Washington, USA

Landslides are a widespread, frequent, and costly hazard in Seattle and the Puget Sound area of Washington State, USA. Shallow earth slides triggered by heavy rainfall are the most common type of landslide in the area; many transform into debris flows and cause significant property damage or disrupt transportation. Large rotational and translational slides, though less common, also cause...
Authors
R.L. Baum, J. Coe, J. W. Godt, E. Harp, M.E. Reid, W. Savage, W.H. Schulz, D.L. Brien, A.F. Chleborad, J.P. McKenna, J. Michael

libvaxdata: VAX data format conversion routines libvaxdata: VAX data format conversion routines

libvaxdata provides a collection of routines for converting numeric data-integer and floating-point-to and from the formats used on a Digital Equipment Corporation1 (DEC) VAX 32-bit minicomputer (Brunner, 1991). Since the VAX numeric data formats are inherited from those used on a DEC PDP-11 16-bit minicomputer, these routines can be used to convert PDP-11 data as well. VAX numeric data...
Authors
Lawrence Baker

The hurricane-flood-landslide continuum The hurricane-flood-landslide continuum

In August 2004, representatives from NOAA, NASA, the US Geological Survey (USGS), as well as other government agencies and academic institutions convened in San Juan, Puerto Rico, at a workshop to discuss a proposed research project called the Hurricane-Flood-Landslide Continuum (HFLC). The purpose of the HFLC is to develop and integrate the multidisciplinary tools needed to issue...
Authors
A. Negri, N. Burkardt, J. Golden, J. Halverson, G. Huffman, M. Larsen, J. McGinley, R. Updike, J. P. Verdin, G. Wieczorek

Wagon loads of sand blows in White County, Illinois Wagon loads of sand blows in White County, Illinois

Several anecdotal accounts provide compelling evidence that liquefaction occurred at several sites in Illinois during the 1811-1812 New Madrid sequence, as much as 250 km north of the New Madrid seismic zone (NMSZ). At one Wabash Valley location, sand blows are still evident near Big Prairie, Illinois, a location described in a particularly detailed and precise historic account. This...
Authors
Susan Hough, Roger Bilham, Karl Mueller, William Stephenson, Robert Williams, Jack Odum

Regulation of landslide motion by dilatancy and pore pressure feedback Regulation of landslide motion by dilatancy and pore pressure feedback

A new mathematical model clarifies how diverse styles and rates of landslide motion can result from regulation of Coulomb friction by dilation or contraction of water‐saturated basal shear zones. Normalization of the model equations shows that feedback due to coupling between landslide motion, shear zone volume change, and pore pressure change depends on a single dimensionless parameter...
Authors
R.M. Iverson

Landslide hazards: A national threat 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: Where and when will landslides occur? How...
Authors
Water Resources Division U.S. Geological Survey

Rainfall-induced landslides in Puerto Rico: An overview Rainfall-induced landslides in Puerto Rico: An overview

Rainfall-induced landslides are common in Puerto Rico (PR). The presence of steep slopes in mountainous terrain, coupled with weathered soils and intense rainfall, leads to severe slope-stability problems throughout the island. Episodic triggering events such as hurricanes and earthquakes further exacerbate these problems. All physiographic provinces of the island have experienced...
Authors
M.A. Pando, M.E. Ruiz, M. Larsen
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