How Fast Is Rock Landslide?

Rock landslides reach 110 km/h. The 1881 Elm rockslide in Switzerland flew for 600 metres through the air before hitting the ground; large rockslides actually behave somewhat like fluids, sliding on a cushion of trapped air.

Large rockslides slide on a cushion of trapped air — behaving more like fluids than solid debris.

• Same as freeway driving
• 1881 Elm rockslide flew 600 m through air