February 11, 2013 Tsunami: Lago Argentino, Argentina

Reference #13943:

During February 10 and 11, 2013, there was a landslide of a block of till and rocky substrate approximately 800 m long and 200 m high, involving a volume of approximately 4,000,000 m3 This removed block descended directly into the Upsala Channel, displacing a similar volume of water and generating a large wave (tsunami). This wave initially spread 4 km towards the opposite slope, depositing icebergs of metric dimensions on the Herminita peninsula. It traveled 15 km. along the Upsala Arm until it reached Onelli Bay, reaching the coast with a height of approximately two meters and transporting logs. As a consequence, the sandy-gravel beach was washed away, gullies and ravines typical of an erosive coast were formed and tree roots were exposed and unstable. In addition, the modification of the coastal profile caused the dock, where tourist boats arrive weekly, to be disconnected from the mainland, resulting in its total destruction. In turn, the wave penetrated dozens of meters through the wooded terrain, until it reached a shelter and construction materials that would be used to expand a shelter, which were incorporated into the wave and magnified its erosive effect. [unofficial translation]