At 11:00 p.m. on 20 September 1988, a huge rockslide occurred in the Darbang region of Nepal.
The volume of landslide was estimated to be about 5 million cubic meters with a dimension of about 750m high ranging from the elevation of 1750 to 1000 m and width of 500m.
The debris was gradually eroded by the river without causing flooding in the downstream region.
However, about a month earlier, an earthquake of 6.7 Richter scale had occurred in eastern Nepal.
About 62 years earlier, a similar landslide killed about 500 people in the same region.