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Ten days after being formed by an earthquake, a landslide dam on the Dadu River in China was destroyed by an aftershock, causing a flood that killed an estimated 100,000 people.
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1786 Kangding-Luding earthquake
Magnitude 7 earthquake (1 June 1786) around Kangding, Sichuan province, China
An earthquake occurred on 1 June 1786 in and around Kangding, in what is now China's Sichuan province. It had an estimated magnitude of about 7.75 and a maximum perceived intensity of X (Extreme) on the Mercalli intensity scale. The initial quake killed 435 people. After an…Source: Wikipedia (CC BY-SA)
Landslide dam
Natural damming of a river by some kind of landslides
A landslide dam or barrier lake is the natural damming of a river by some kind of landslide, such as a debris flow, rock avalanche or volcanic eruption. If the damming landslide is caused by an earthquake, it may also be called a quake lake. Some landslide dams are as high as…Source: Wikipedia (CC BY-SA)
Dadu River
River in southwestern China
The Dadu River, known in Tibetan as the Gyelmo Ngul Chu, is a major river located primarily in Sichuan province, southwestern China. The Dadu flows from the eastern Tibetan Plateau into the Sichuan Basin where it joins with the Min River, a tributary of the Yangtze River.…Source: Wikipedia (CC BY-SA)
Aftershock
Smaller earthquake which follows a larger one in the same area
In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in the same area of the main shock, caused as the displaced crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable…Source: Wikipedia (CC BY-SA)