Usoi Dam

Usoy
The Usoi Dam is a natural landslide dam along the Murghab River in Tajikistan.wikipedia
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Landslide dam

debris dambarrier lakelandslide lake
The Usoi Dam is a natural landslide dam along the Murghab River in Tajikistan.
The highest known landslide dam of historic times is the Usoi Dam in modern Tajikistan created by a landslide triggered by an earthquake on February 18, 1911. It dammed the Murghab River to the height of 1860 ft to impound Sarez Lake 1657 ft deep.

Bartang River

Murghab RiverMurghabBartang
The Usoi Dam is a natural landslide dam along the Murghab River in Tajikistan.
A few miles below Murghab is Sarez Lake, formed by a landslide during the 1911 Sarez earthquake, which created the world's highest natural dam, Usoi Dam.

1911 Sarez earthquake

1911-02-18A magnitude 7.4 earthquakeearthquake in 1911
The dam was created on February 18, 1911, when the 7.4-M s Sarez earthquake caused a massive landslide that blocked the flow of the river.
It triggered a massive landslide, blocking the Murghab River and forming the Usoi Dam, the tallest dam in the world, creating Sarez Lake.

Sarez Lake

Sarez
The basin formed by Usoi Dam now holds Sarez Lake, a 55.8 km-long lake holding 16.074 km3 of water.
Scientists believe that the landslide dam formed by the earthquake, known as the Usoi Dam, is unstable given local seismicity, and that the terrain below the lake is in danger of catastrophic flood if the dam were to fail during a future earthquake.

Tajikistan

🇹🇯TajikRepublic of Tajikistan
The Usoi Dam is a natural landslide dam along the Murghab River in Tajikistan.

Surface wave magnitude

M s magnitudesurface wave
The dam was created on February 18, 1911, when the 7.4-M s Sarez earthquake caused a massive landslide that blocked the flow of the river.

Landslide

landslideslandslipdebris avalanche
The dam was created on February 18, 1911, when the 7.4-M s Sarez earthquake caused a massive landslide that blocked the flow of the river.

Murghab River

MurghabMorghab RiverMurgab
The dam is formed of approximately 2 km3 of rock dislodged from the steeply sloped river valley of the Murghab, which cuts from east to west through the high and rough Pamir Mountains.

Pamir Mountains

PamirPamirsPamir Mountain System
The dam is formed of approximately 2 km3 of rock dislodged from the steeply sloped river valley of the Murghab, which cuts from east to west through the high and rough Pamir Mountains.

Liquefaction

liquefyliquefiedliquify
Geologists are concerned that the Usoi Dam may become unstable during future large-magnitude earthquakes, which are relatively common in the seismically active Pamirs, and might collapse due to liquefaction or subsequent landslides during such an event.

Murghob District

MurghabMurghab districtMurghob
This would focus and maintain any flood's destructive power as it swept through the valley of the Murghob District.

List of dams and reservoirs

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Usoi Dam

Usoi

Usoi Dam, a natural landslide dam on the Murghab River in Tajikistan

2015 Tajikistan earthquake

2015-12-07Tajikistan
The epicentre of this quake was approximately 5.0 km distant from the epicentre of the M7.3 1911 Sarez earthquake which formed the Usoi Dam across the Murghab river.

February 1911

February 7
A magnitude 7.4 earthquake created the highest dam in the world, the 567 meters Usoi Dam, across the Murghab River in what is now Tajikistan. The tremor and the subsequent damming of the river killed 90 people.

Dam

earthfilldamsconcrete-face rock-fill dam
Historical examples include the Usoi Dam in Tajikistan, which blocks the Murghab River to create Sarez Lake.

Earthquake

earthquakesseismic activityseismic
The terrain below the Sarez Lake in Tajikistan is in danger of catastrophic flood if the landslide dam formed by the earthquake, known as the Usoi Dam, were to fail during a future earthquake.