Oso disaster had its roots in earlier landslides

An aerial view of the slide site at Oso, Washington.

An aerial view of the slide site at Oso, Washington.

An interdisciplinary team of risk analysis experts, engineers, and scientists — including Earth and Spaces Sciences’ David Montgomery — released a report on Tuesday offering details about the Oso landslide that happened earlier this year. The  report focuses on observations and data collection where the landslide occurred, reviews nearby geologic conditions and land-use and landslide risk assessments, and collects eyewitness accounts of the disaster. A major finding of the report shows that the slide took place in two phases, the first of which was the “remobilization” of an earlier slide dating back to 2006.

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