Publications
Filter Total Items: 883
Distribution and tsunamigenic potential of submarine landslides in the Gulf of Mexico
The Gulf of Mexico (GOM) is a geologically diverse ocean basin that includes three distinct geologic provinces: a carbonate province, a salt province, and canyon to deep-sea fan province, all of which contain evidence of submarine mass movements. The threat of submarine landslides in the GOM as a generator of near-field damaging tsunamis has not been widely addressed. Submarine landslides in the G
Authors
Jason D. Chaytor, David C. Twichell, Patrick Lynett, Eric L. Geist
Estimating the timing and location of shallow rainfall-induced landslides using a model for transient, unsaturated infiltration
Shallow rainfall-induced landslides commonly occur under conditions of transient infiltration into initially unsaturated soils. In an effort to predict the timing and location of such landslides, we developed a model of the infiltration process using a two-layer system that consists of an unsaturated zone above a saturated zone and implemented this model in a geographic information system (GIS) fr
Authors
Rex L. Baum, Jonathan W. Godt, William Z. Savage
Geologic characteristics and movement of the Meadow Creek landslide, part of the Coal Hill landslide complex, western Kane County, Utah
The Meadow Creek landslide, part of the Coal Hill landslide complex in western Kane County, Utah, is about 1.7 miles (2.7 km) wide and 1.3 miles (2.1 km) long and contains six smaller historical slides. The upper part of the Meadow Creek landslide is gently sloping and consists of displaced and back-rotated blocks of Cretaceous Dakota and Cedar Mountain Formations that form northeast- to locally
Authors
Francis X. Ashland, Greg N. McDonald
Effects of soil aggregates on debris-flow mobilization: Results from ring-shear experiments
Rates and styles of landslide motion are sensitive to pore-water pressure changes caused by changes in soil porosity accompanying shear deformation. Soil may either contract or dilate upon shearing, depending upon whether its initial porosity is greater or less, respectively, than a critical-state porosity attained after sufficiently high strain. We observed complications in this behavior, however
Authors
Neal R. Iverson, Janet E. Mann, Richard M. Iverson
Evolution of earthquake-triggered landslides in the Kashmir Himalaya, northern Pakistan
The influence of the 08 October 2005 Kashmir earthquake and subsequent snow melt and monsoon rainfall on slope stability was evaluated using repeat photography in the Kashmir Himalaya of northern Pakistan. Sixty-eight landslide-affected locations were selected and photographed in November 2005, May/June 2006, June 2007, and August 2007 to evaluate all potential geomorphic changes. Eighty percent o
Authors
G.A. Khattak, L.A. Owen, U. Kamp, E. L. Harp
Tree-ring dated landslide movements and seismic events in southwestern Montana, USA
Because many tree species can live for several centuries or longer (Brown 1996), tree-ring analysis can be a valuable tool to date geomorphic events such as landslides, earthquakes, and avalanches in regions lacking long historical records. Typically, a catastrophic landslide will destroy all trees on the landslide, but trees on slower moving landslides may survive. For example, the Slumgullion ea
Authors
Paul E. Carrara, J. Michael O'Neill
Estimating the empirical probability of submarine landslide occurrence
The empirical probability for the occurrence of submarine landslides at a given location can be estimated from age dates of past landslides. In this study, tools developed to estimate earthquake probability from paleoseismic horizons are adapted to estimate submarine landslide probability. In both types of estimates, one has to account for the uncertainty associated with age-dating individual even
Authors
Eric L. Geist, Thomas E. Parsons
Top of head scarp and internal scarps for landslide deposits in the Little North Santiam River Basin, Oregon
Data points represent head scarps, flank scarps, and minor internal scarps (linear) associated with landslide deposits in the Little North Santiam River Basin, Oregon. This work was completed as part of the Master's thesis "Turbidity Monitoring and LiDAR Imagery Indicate Landslides are Primary Source of Suspended-Sediment Load in the Little North Santiam River Basin, Oregon, Winter 2009-2010" by S
Authors
Steven Sobieszczyk
Location of photographs showing landslide features in the Little North Santiam River Basin, Oregon
Data points represent locations of photographs taken of landslides in the Little North Santiam River Basin, Oregon. Photos were taken in spring of 2010 during field verification of landslide locations (deposits previously mapped using LiDAR-derived imagery). The photographs depict various landslide features, such as scarps, pistol-butt trees, or colluvium deposits. This work was completed as part
Authors
Steven Sobieszczyk
Landslide inventory for the Little North Santiam River Basin, Oregon
This geodatabase is an inventory of existing landslides in the Little North Santiam River Basin, Oregon (2009). Each landslide feature shown has been classified according to a number of specific characteristics identified at the time recorded in the GIS database. The classification scheme was developed by the Oregon Department of Geology and Mineral Industries (Burns and Madin, 2009). Several sig
Authors
Steven Sobieszczyk
Head scarp boundary for the landslides in the Little North Santiam River Basin, Oregon
Polygons represent head scarps and flank scarps associated with landslide deposits in the Little North Santiam River Basin, Oregon. This work was completed as part of the Master's thesis "Turbidity Monitoring and LiDAR Imagery Indicate Landslides are Primary Source of Suspended-Sediment Load in the Little North Santiam River Basin, Oregon, Winter 2009-2010" by Steven Sobieszczyk, Portland State Un
Authors
Steven Sobieszczyk
High tsunami frequency as a result of combined strike-slip faulting and coastal landslides
Earthquakes on strike-slip faults can produce devastating natural hazards. However, because they consist predominantly of lateral motion, these faults are rarely associated with significant uplift or tsunami generation. And although submarine slides can generate tsunami, only a few per cent of all tsunami are believed to be triggered in this way. The 12 January Mw 7.0 Haiti earthquake exhibited pr
Authors
Matthew J. Hornbach, Nicole Braudy, Richard W. Briggs, Marie-Helene Cormier, Marcy B. Davis, John B. Diebold, Nicole Dieudonne, Roby Douilly, Cliff Frohlich, Sean P.S. Gulick, Harold E. Johnson, Paul Mann, Cecilia McHugh, Katherine Ryan-Mishkin, Carol S. Prentice, Leonardo Seeber, Christopher C. Sorlien, Michael S. Steckler, Steeve Julien Symithe, Frederick W. Taylor, John Templeton