Categories :

What caused the Oso Washington mudslide?

What caused the Oso Washington mudslide?

Oso mudslide and recovery timeline 1900s – Seasonal high water begins eroding the hill that eventually gave way in the 2014 mudslide. The Stillaguamish River channel pushes north. 1930s to 1950s – Logging is the economic engine of the Oso area. Some of the logged area is sensitive to shifting because of groundwater.

Where was the Oso mudslide?

2014 Oso mudslide/Location

What was the final event that triggered the fatal 2014 Oso mudslide in Washington state?

2014 Oso mudslide

Oso mudslide on March 29, 2014, view to the northeast
Date March 22, 2014
Coordinates 48°16′57″N 121°50′53″WCoordinates: 48°16′57″N 121°50′53″W
Cause Suspected soil saturation from heavy rainfall
Deaths 43

How many bodies recovered from Oso slide?

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 is the most landslide prone country in the world?

Countries where there are frequent landslides include China, the western United States, Italy, Switzerland, Japan, the Philippines and Indonesia. Countries that straddle the Himalayas such as Nepal, Pakistan and India are also areas where there are a large number of landslides.

Could the disaster at Oso Washington have been prevented?

Landslide-risk mapping alone could not have prevented the Oso tragedy. Only direct actions such as investing in hillside stabilization or keeping individuals out of harm’s path could have done that.

Did they recover all the bodies from the Oso slide?

In the tragic circumstances of the landslide it is an extraordinary achievement to have recovered all of the remains, given the size and mobility of the slide. The search and rescue teams at Oso deserve great credit for what they have achieved.

What is the biggest mudslide in history?

Famous Mudslides By Fatalities

Rank Mudslide Name Location
1 1999 Vargas Tragedy Vargas, Venezuela
2 1985 Armero Tragedy Tolima, Colombia
3 2013 India Monsoons Uttarakhand, India
4 2010 Gansu Mudslide Zhouqu County, China

What is the largest landslide in history?

Helens massive Eruption: The largest landslide ever recorded. In 1980, the explosion of Mount St. Helens in the state of Washington, United States, triggered the largest (on land) landslide ever recorded.

What is the largest landslide ever recorded?

Mount St. Helens
The largest subaerial (on land) landslide in Earth’s recorded history was connected with the 1980 eruption of Mount St. Helens volcano in Washington state, USA.

How fast was the Oso landslide?

USGS research indicates that the landslide’s average speed was about 40 miles per hour, with maximum speeds likely even higher. 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.

How many people died in Washington mudslide?

2014 Oso mudslide/Number of deaths

How big was the landslide in Washington State?

New volume estimates of the landslide using lidar-derived maps collected after the landslide reveal that, by the time the event had ended, the landslide had moved about 19 million tons of sand and till, and had covered approximately one-half square mile. That amount of material would cover approximately 700 football fields 10 feet deep.

How big was the landslide in Steelhead Haven?

The slide dammed the North Fork Stillaguamish River to a depth of as much as 25 feet, forming a temporary lake 2.5 miles long, which flooded houses and other structures in Steelhead Haven.

When did the North Fork Stillaguamish River Slide?

Shortly after the slide, USGS scientists identified and published a paper describing the North Fork Stillaguamish River valley and the geologic evidence they had uncovered showing the occurrence of past landslides, some of which traveled in a similar pattern to that of the 2014 landslide.

Who was involved in the Oso landslide in Washington?

The USGS, working in collaboration with the Washington State Department of Transportation and the University of California, Berkeley, performed laboratory testing of soil samples from the landslide to identify the composition of the materials forming the landslide.