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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 serious property damage. The hundreds of landslides that occurred during the winters of 1995-96 and 1996-97 stimulated renewed interest by Puget Sound communities in identifying landslide-prone areas and taking actions to reduce future landslide losses. Informal partnerships between the U.S. Geological Survey (USGS), the City of...
Categories: Publication; Types: Citation; Tags: Landslides
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This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 photogrammetric plotter at 4X and 8X magnifications. The photographs were scaled and oriented to the topographic base map using prominent topographic landmarks and plotted on a transparent polyester overlay registered to the topographic base maps at scales of 1:50,000 or 1:25,000. In areas where landslides were very sparse, the aerial photographs were scanned with a mirror stereoscope at 4X magnification, and landslide locations were transferred to base maps by inspection....
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This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 photogrammetric plotter at 4X and 8X magnifications. The photographs were scaled and oriented to the topographic base map using prominent topographic landmarks and plotted on a transparent polyester overlay registered to the topographic base maps at scales of 1:50,000 or 1:25,000. In areas where landslides were very sparse, the aerial photographs were scanned with a mirror stereoscope at 4X magnification, and landslide locations were transferred to base maps by inspection....
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This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 photogrammetric plotter at 4X and 8X magnifications. The photographs were scaled and oriented to the topographic base map using prominent topographic landmarks and plotted on a transparent polyester overlay registered to the topographic base maps at scales of 1:50,000 or 1:25,000. In areas where landslides were very sparse, the aerial photographs were scanned with a mirror stereoscope at 4X magnification, and landslide locations were transferred to base maps by inspection....
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Rockfalls strongly influence the evolution of steep rocky landscapes and represent a significant hazard in mountainous areas. Defining the most probable future rockfall source areas is of primary importance for both geomorphological investigations and hazard assessment. Thus, a need exists to understand which areas of a steep cliff are more likely to be affected by a rockfall. An important analytical gap exists between regional rockfall susceptibility studies and block-specific geomechanical calculations. Here we present methods for quantifying rockfall susceptibility at the cliff scale, which is suitable for sub-regional hazard assessment (hundreds to thousands of square meters). Our methods use three-dimensional...
Categories: Publication; Types: Citation; Tags: Landslides
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This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622.
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This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622.
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This map describes the possible hazard from earthquake-induced landslides for the city of Berkeley, CA. The hazard depicted by this map was modeled for a scenario corresponding to an M=7.1 earthquake on the Hayward, CA fault. This scenario magnitude is associated with complete rupture of the northern and southern segments of the Hayward fault, an event that has an estimated return period of about 500 years. The modeled hazard also corresponds to completely saturated ground-water conditions resulting from an extreme storm event or series of storm events. This combination of earthquake and ground-water scenarios represents a particularly severe state of hazard for earthquake- induced landslides. For dry ground-water...
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Presented here is a point cloud collected by the U.S. Geological Survey (USGS) using an oblique plane-mounted camera system, covering the area of the Mud Creek landslide on California State Route 1 (SR1), Mud Creek, Big Sur, California. The point cloud is referenced to previously published lidar data and contains RGB information as well as XYZ. Point cloud coordinates are in NAD83 UTM Zone 10 meters. Imagery was collected with a Nikon D800 camera in RAW format and processed using structure-from-motion photogrammetry with Agisoft PhotoScan version 1.2.8 through 1.3.2. Pointclouds were clipped to an AOI using LASTools. The AOI was created from a KMZ in Google Earth and transformed to a shapefile using ArcMap 10.5.
Tags: Bathymetry and Elevation, Big Sur, CMHRP, California, Cape San Martin, All tags...
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Subaerial landslides at the head of Barry Arm Fjord in southern Alaska could generate tsunamis (if they rapidly failed into the Fjord) and are therefore a potential threat to people, marine interests, and infrastructure throughout the Prince William Sound region. Knowledge of ongoing landslide movement is essential to understanding the threat posed by the landslides. Because of the landslides' remote location, field-based ground monitoring is challenging. Alternatively, periodic acquisition and interferometric processing of satellite-based synthetic aperture radar data provide an accurate means to remotely monitor landslide movement. Interferometric synthetic aperture radar (InSAR) uses two Synthetic Aperture...
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Landslide near Uintah, Weber County, Utah.n.d. (Panorama with photo no. 3484). Published as plate 17-A in U.S. Geologocal Survey. Professional paper 153. 1928. See Woolley, Photo No. wrr00330. (now-then27).
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Alaska Earthquake March 27, 1964. Landslide effects in Turnagain Heights in Anchorage. 1964.
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The April 1998 El Niño-Triggered Anzar Road landslide, San Benito County, California El Niño-driven rainfall triggered many landslides and debris flows in northern and north-central California during the winter and spring of 1997-98. The 1997-98 rainy season began normally in the fall of 1997, but turned unusually wet in late November. The 1998 Anzar Road landslide occurred as a reactivation of an old landslide in Pleistocene nonmarine claystone, sandstone and conglomerate immediately adjacent to the San Andreas rift Zone. Destructive movement began during the early morning of april 22 as a moderately deep-seated earth slide within the area of the old landslide. This slide, on an average slope of 12 degrees,...


map background search result map search result map Seismic Landslide Hazard for the City of Berkeley, California Older landslides in La Uni�n quadrangle, Guatemala Landslide initiation locations in Mariscos quadrangle, Guatemala Landslide initiation locations in Morales quadrangle, Guatemala Older landslides in R�o Hondo quadrangle, Guatemala Older landslides in Tactic quadrangle, Guatemala Anzar road landslide, San Benito County, California. 1998. Structure-from-motion point cloud of Mud Creek, Big Sur, California, 2017-05-27 Interferometric synthetic aperture radar data from 2020 for landslides at Barry Arm Fjord, Alaska Structure-from-motion point cloud of Mud Creek, Big Sur, California, 2017-05-27 Interferometric synthetic aperture radar data from 2020 for landslides at Barry Arm Fjord, Alaska Seismic Landslide Hazard for the City of Berkeley, California Older landslides in Tactic quadrangle, Guatemala Anzar road landslide, San Benito County, California. 1998.