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Landslides constitute a major geologic hazard because they are widespread, occur in all 50 states and U.S. territories, and cause $1-2 billion in damages and more than 25 fatalities on average each year. Expansion of urban and recreational developments into hillside areas leads to more people that are threatened by landslides each year. Landslides commonly occur in connection with other major natural disasters such as earthquakes, volcanoes, wildfires, and floods. Hazards occur in all regions of the world and include fast-moving debris flows, slow-moving landslides, and a variety of flows and slides that are often associated with other natural disasters such as earthquakes, volcanic eruptions, floods, and wildfires. (text from USGS)
Additional related links of interest:
USGS Landslides Hazards Program
NASA
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Figure 1 - 3D map view of interpolated PSInSAR™ displacements of the study area. The location of the Hayward Fault is highlighted by the distinct change in colour. The underlying image is an orthorectified airphoto with 60 cm resolution (Courtesy of USGS). ERS data©ESA 1992-2001 - Layer: 60 cm orthophoto. George E. Hilley, Roland Bürgmann, Alessandro Ferretti, Fabrizio Novali and Fabio Rocca, Dynamics of Slow-Moving Landslides from Permanent Scatterer Analysis, SCIENCE MAGAZINE, 25 June 2004, Volume 304, Number 5679, Pages 1952-1955. More information is available here.
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