ABSTRACT
Large volcanic landslides are common phenomena at most volcanoes worldwide. The deposits and morphologies that characterise these events have been identified in subaerial and submarine environments worldwide (e.g. Siebert, 1996). The importance of studying large volcanic landslides is highlighted by their potential to cause significant damage to areas up to tens of kilometres from the volcano. There is also the potential for damage on a larger scale when landslides enter the sea and generate a tsunami. Volcanic landslides are generally more voluminous than non-volcanic events. The largest volcanic landslides, which can reach volumes in excess of hundreds of cubic kilometres, occur as volcanic islands flank collapses (e.g. Masson et al., 2002; Moore et al., 1989), Similar but relatively smaller events, with volumes in the range 0.1-20 km3, have been observed at stratovolcanoes worldwide (e.g. Siebert, 1996; Vallance et al., 1995). In many cases, collapses are recurrent phenomena at one same volcanic edifice.
