LANDSLIDE IN OSO, WASHINGTON

On Saturday, March 22, 2014, at 10:37 a.m. local time, a major mudslide occurred 6.4 km east of Oso, Washington, United States. 

A portion of an unstable hillside known as the "Hazel Landslide" collapsed, sending mud and debris across the North Fork of the Stillaguamish River and onto the adjacent river valley, covering an area of approximately 2.6 km².

^[update] Excluding landslides caused by volcanic eruptions, earthquakes or dam collapses, this is the deadliest single landslide event in United States history.