The most prominent feature on the upper SE flank of Ontakesan volcano is the headwall scarp of a volcanic landslide. The landslide occurred on 14 September 1984 with no associated eruptive activity. The resulting debris avalanche traveked 13 km down the Nigori and Otaki river valleys.

Photo by Lee Siebert, 1988 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Galleries: Debris Avalanches / Landslides

Keywords: landslide scarp | sector collapse

Ontakesan