A secondary landslide on Highway 101 north of Legget, California was captured on video at the end of April. The original slide closed the highway and after Caltrans was able to clear it and reopen the highway for several hours, a stuck motorist took this video. What strikes me is how overconfident the (presumably) Caltrans employees are. If you see the slope shedding rocks like that, you better get back in a hurry! [Source: Facebook Video from Wendy K. via LostCoastOutpost.com. Image: Times-Standard]
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Landslide Videos from Brazil
Dr. Dave has posted links to a few scary landslide videos from the recent heavy rains affecting the Santa Catarina province of Brazil. This latest one shows an ambulance being swept off a road by a “small” landslide. The ease with which the vehicle is moved is quite impressive. It didn’t appear that anyone was injured in this particular landslide but I’m sure there might have been some underwear changing involved. Elsewhere in the region people have not been so lucky and there is a heavy death toll. Click through for two videos.
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Utah Releases Landslide Susceptibility Map
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!
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Looks like the Facebook video gets cropped when I embedded it here. You can go watch it from either of the source links to see the entire thing.