Tsunamigenic submarine landslides along the Xauen-Tofiño banks in the Alboran Sea (Western Mediterranean Sea)
Authors
Rodriguez, M.; Maleuvre, C.; Jolivet-Castelot, M.; d'Acremont, E.; Rabaute, A.; Lafosse, M.; Ercilla, G.; Vázquez, J.T. (Juan Tomás); Alonso, B. (Belén); Ammar, A.; Gorini, Ch.Date
2017-02-06Type
articleKeywords
LANDSLIDESTSUNAMI
SEAMOUNT
ALBORAN MARGIN
Abstract
The active Eurasia–Nubia plate boundary runs across the Alboran Sea in theWestern Mediterranean Sea, where the connection between the Atlantic and Mediterranean water masses occurs. Earthquakes above magnitude Mw > 6 may favour the occurrence of landslides within contouritic drifts in the Alboran Sea. A compilation of recent multibeam data reveals for the first time the distribution of slope failures along the Xauen–Tofi˜no banks, in the southern Alboran Sea. Here, we provide a detailed mapping and description of the morphology of eight Holocene landslides, including volume estimations of the failed mass and the related mass transport deposits (MTDs). The most voluminous landslide mobilized ∼0.5 km3 of sediment
at the initial stage of slope failure, and formed a ∼2.2–5.6 km3 MTD. A finite-difference numerical model, assimilating the landslide to a granular flow, simulates tsunami generation and propagation for a slide similar to the most voluminous one. Simulations show that the coastline ...