“…In several cases DSGSDs are accompanied by secondary, more active subunits preferentially occurring on highly fractured and intensely deformed rock masses on the bulged toe of the DSGSD (Bovis & Evans, 1996;Crosta et al, 2014). Such landslide subunits can show enhanced, fluctuating displacement rates ranging from centimetres to several metres per year (Brückl et al, 2013;Pfeiffer et al, 2018;Zieher et al, 2019). In some cases they accelerate and result in catastrophic slope failures such as rockslides and rock avalanches, endangering human well-being and infrastructure situated on the top of the landslide or within its potential run-out area (Carlà et al, 2017;Ostermann & Sanders, 2017).…”