Fig. 1From: Spatio-temporal variability in debris-flow activity: a tree-ring study at Geisstriftbach (Swiss Alps) extending back to AD 1736The Geisstriftbach study site is located in the Mattertal valley (Valais, Switzerland) between the villages of Herbriggen and Randa. The catchment of the Geisstriftbach torrent (area: 5 km2) extends from the cone apex at 1,350 m a.s.l. to 4,035 m a.s.l. (Dirrehorn summit) and contains a large rock-glacier in the source area of the torrentBack to article page