According to JapanToday, the death toll from the Typhoon Morakot caused mudslides and related damage could be as high as 600 after the typhoon dumped over 2-meters of rain (79-inches!) on the island nation. The mudslide that virtually destroyed the entire village of Hsiao-lin (guardian.co.uk) or Shiaolin (Japan Today) could have as many as 400-500 of those casualties. Most rescue efforts have been halted, but many people are still missing and possibly buried under mudslide and landslide debris as the Taiwanese President is coming under fire for his handling of disaster. (AP Photo via Guardian.co.uk)
A massive rockslide closed a busy interstate route last week near the border between Tennessee and North Carolina in Pigeon River Gorge. This area has had landslide problems in the past. In 1997 a rockslide in the same area closed the freeway for approximately 3 months. (Photo from Landslides Under a Microscope Blog, original source not cited)
I have yet to see volume estimates, but The Charlotte Observer quoted a highway patrol officer who was at the scene:
He said the roadway is covered by a gigantic mound of debris, from pebbles up to house-sized boulders. The pile is 40 to 50 feet high, Williamson estimated, and hundreds of feet long.
More info and video after the break. […]
The Utah Geologic Survey has released a "Landslide Susceptibility Map of Utah". They apparently relied quite heavily on GIS based thresholding of existing slope angles but only after they had statistically analyzed failure angles for particular geologic units. So it sounds like they throw the known landslides, the geologic map of Utah and a DEM into the GIS a blend it all up. Perhaps a slight oversimplification!