Tsunamigenic submarine landslides along the Xauen-Tofiño banks in the Alboran Sea (Western Mediterranean Sea)
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AuthorsRodriguez, M.; Maleuvre, C.; Jolivet-Castelot, M.; d'Acremont, E.; Rabaute, A.; Lafosse, M.; Ercilla, G.; Vázquez, J.T. (Juan Tomás); Alonso, B.; Ammar, A.; Gorini, Ch.
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 ...