Summary
An educational overview of mass movement, covering the factors that trigger it, the various types from soil creep to mudflows, and a historical case study of the Armero tragedy.
Highlights
Definition and Causes of Mass Movement00:00:32
Mass movement, or mass wasting, is the downslope movement of material driven by gravity. It is heavily influenced by slope gradient, water saturation, lack of vegetation, and tectonic activity.
Types of Mass Movement00:01:50
Mass movements range from slow processes like soil creep and solifluction to rapid, destructive events such as landslides, rock slides, and mudflows.
Case Studies: Italy and Colombia00:03:20
Exploration of the 1963 Lagonegro disaster caused by a rock slide and the 1985 Armero tragedy in Colombia, where a volcanic lahar destroyed 85% of the town, killing 23,000 people.