Largest modern-day landslide
Who
Mount St. Helens eruption
What
2800000000 square metre(s)
Where
United States (Mt St Helens)
When
The landslide on Mt St Helens on 18 May 1980, was the largest ever observed by a survivor, when about 2800million m3 96,000million ft3 of rock slipped off the mountain immediately prior to the volcanic eruption. This is equivalent to a block of earth nearly one and a half kilometers high, wide, and long (0.8 miles high, wide and long).