What caused the 2014 Oso landslide in Washington?
A major landslide occurred 4 miles (6.4 km) east of Oso, Washington, United States, on March 22, 2014, at 10:37 a.m. local time….2014 Oso mudslide.
| Oso mudslide on March 29, 2014, view to the northeast | |
|---|---|
| Date | March 22, 2014 |
| Location | Oso, Washington |
| Coordinates | 48°16′57″N 121°50′53″W |
| Cause | Suspected soil saturation from heavy rainfall |
How many were killed in the Oso landslide?
43 people
At 10:37 a.m. on March 22, 2014, the once forested hillside above Oso collapsed without warning in a massive landslide, destroying the Steelhead neighborhood and killing 43 people. Dozens of homes were wiped out when mud, rocks, trees and debris roared down a hillside above the north fork of the Stillaguamish River.
How large an area was covered by the March 2014 Oso Washington landslide?
about one half square mile
The area overrun by the landslide was about one half square mile, and the landslide moved about 18 million tons of sand, till, and clay. That amount of material would cover approximately 600 football fields 10 feet deep.
What state in 2014 did one of the most devastating landslides in US history occur?
Washington state
On March 22, 2014, 43 people die when a portion of a hill suddenly collapses and buries a neighborhood in the small community of Oso, Washington, some 55 miles northeast of Seattle. It was one of the deadliest mudslides in U.S. history.
What was unusual about the Oso landslide?
The Oso landslide involved a complex sequence of geological and hydrological events that ultimately resulted in a debris-avalanche flow. USGS research indicates that the landslide traveled exceptionally far, crossing the entire one-half-mile wide river valley.
Did they recover all the bodies from the Oso landslide?
April 29, 2014, 10:02 a.m. The Snohomish County Medical Examiner’s Office identified all 42 bodies recovered from the site of the March 22 landslide near Oso, Wash. In connection to the landslide, the county listed one person as still missing.
What was the biggest landslide in history?
In 1980, the explosion of Mount St. Helens in the state of Washington, United States, triggered the largest (on land) landslide ever recorded.
How could the Oso mudslide been avoided?
Yes, the slope could probably be stabilized, by some combination of subsurface drainage, diversion structures and slope reconstruction. In such a location, local government can and should prohibit new development, unless the slope is made to be safe.