The Köfels landslide was a gigantic landslide, known as a sturzstrom, that occurred in the Ötz valley approximately 9800±100 years ago according to radiocarbon dating of trees buried by the event. It involved a 2.5 km horizontal displacement and 800 m vertical displacement of 3.2 km3 of rock and mud along the Ötz valley floor, making it the third largest known sturzstrom.
^Ivy-Ochs S, Heuberger H, Kubik PW, Kerschner H, Bonani G, Frank M, and Schlüchter C. (1998). The age of the Köfels event — relative, 14C, and cosmogenic isotope dating of an early Holocene landslide in the central Alps (Tyrol, Austria). Zeitschrift für Gletscherkunde und Glazialgeologie, (34):57–70.
^Sørensena, SA and Bauer, B (15 August 2003). On the dynamics of the Köfels sturzstrom. Geomorphology, 54(1–2):11–19.