October 21, 2013 - Nighttime view of incandescent rockfall of glowing lava down flank of lava dome of Shiveluch Volcano, Kamchatka, Russia.

October 21, 2013 - Nighttime moonlit view of incandescent rockfall of glowing lava down flank of lava dome of Shiveluch Volcano, Kamchatka, Russia.

November 30, 2012 - Glowing Rerombola lava dome with incandescent rockfall deposit, Paluweh volcano, Flores, Indonesia.

November 25, 2012 - Extrusion of lava through lava plug on top of conduit leads to small glowing rockfalls. Batu Tara volcano, Komba Island, Indonesia.

Frank Slide, where giant rockfall occurred in 1903, limestone debris fell 400m, Alberta, Canada, North America

Rockfalls from red and white chalk cliff, Hunstanton, Norfolk, England, United Kingdom, Europe

Frank Slide (massive rockslide of limestone from Turtle Mountain that buried town in 1903), Crowsnest Pass, southern Alberta, Rockies, Canada, North America

A truck heading into Taroudannt province, on a mountain road in the Atlas mountains of Morocco, North Africa, Africa

A rock fall on Ben Starav in Glen Etive, Highlands, Scotland, United Kingdom, Europe

A rock fall on Ben Starav in Glen Etive, Highlands, Scotland, United Kingdom, Europe

The massive 1991 Randa landslide below Zermatt, Switzerland, Europe