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- USGS RELEASES REPORT and VIDEO: "Landslide Mobility and Hazards: Implications of the 2014 Oso Disaster" (posted 01/12/2015)
he large landslide that occurred on March 22, 2014 near Oso, Washington, was unusually mobile and destructive. Eighteen million tons of sediment slid downslope and crossed the half-mile wide river floodplain in about 1 minute with devastating consequences to the local community. A major focus of USGS researchers has been to understand the landslide's behavior. This published study reveals that the collapsing material compressed already-unstable wet sediment to produce liquefaction and decreased friction, leading to the landslide's high mobility. Please see a video of the computer simulations used in the report.
- New Report: Oso (Washington) Landslide Research Paves Way for Future Hazard Evaluations (posted 01/12/2015)
- USGS Published Geochemical and Mineralogical Maps for Soils of the United States (posted 01/08/2015)