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.
What type of landslide was Oso?
The landslide involved a complex sequence of events—including rotation, translation, and flow mechanisms—and can be referred to as a debris-avalanche flow. Studies indicate that slope failure occurred in two stages over the course of about 1 minute.
How deep was the mud that resulted from the slide?
The debris field from the slide covered a square mile and was estimated to be 80 feet deep in some places. In July 2014, search and rescue workers discovered what was believed to be the last body of the 43 victims killed in the disaster.
What was the deadliest mudslide?
Deadliest Landslides In Recorded History
- Huaraz Debris Flows, Ancash, Peru, December 1941 (5,000 deaths)
- 62 Nevado Huascaran Debris Fall, Ranrahirca, Peru, January 1962 (4,500 deaths)
- Khait Landslide, Tajikstan, July 1949 (4,000 deaths))
- Diexi Slides, Sichuan, China, August 1933 (3,000+ deaths)
What was the worst landslide in history?
What was the deadliest landslide in recorded US history?
The worst landslide in U.S. history was in 1928, when as many as 500 people were killed after the collapse of the St. Francis Dam near Los Angeles, according to geologist Lynn Highland of the U.S.Geological Survey. National Landslide Information Center in Golden, Colo.
The mudslide, which occurred Saturday morning, crashed down a hillside and destroyed more than 30 homes in the town of Oso. More than 90 people are still unaccounted for. The mudslide was likely caused by prolonged rainfall, according to Rex Baum, a research geologist with the U.S. Geological Survey.
What are the effects of mudslide?
Health hazards are one of the main effects of mudslides. Rapid moving water and wreckage lead to trauma for the sufferers. Clogged drainages can also cause spread of diseases. Broken electrical, water, gas, and sewage lines can result in injury or illness.
What is the biggest mudslide?
1999 Vargas Tragedy. In December 1999,in the highlands of Venezuela,excessive rainfall resulted in deadly mudslides that ravaged the country.
What is the most recent landslide?
The natural rock and mineral formation (referred to by geologists as a “geological feature”) with the most recent activity in the area of Oso is known as the Hazel Landslide; the most recent landslide event was referred to in the media as “the Oso mudslide.”.