The North Sicily continental margin is a very active region located in the Central Mediterranean. Strong seismicity, activetectonics and volcanism, fluid escape, high sediment supply, and widespread mass movements historically have exposed thisregion to marine geohazards, with a potential for tsunami generation. Morpho-bathymetric analysis revealed that one of the mostcommon mechanisms associated with marine geohazards is due to submarine mass failure processes, genetically linked to theother processes active in this margin.With the aim to assess the risks associated with landslide-generated anomalous waves, weselected two sectors of this margin, Gulf of Palermo to the west and Patti offshore to the east. The workflow included analysis ofthe morpho-bathymetric data, morphometric characterization, calculation of parameters of landslide-generated waves, and computationof run-ups by using different algorithms. Assuming that each of the identified landslides could be a potentialtsunamigenic source, we calculated the associated theoretical run-ups, referring to the main computation methodologies proposedin the scientific literature. In order to identify the methodology that better suits run-up values for landslide-generated tsunami, wecompared the known run-up values of actual, historical cases with those calculated through the different methodologies. Thevalues obtained with the most suitable equation, both for theoretical and historical events, fit a curve that we used to formulate anempirical law describing the relationships between amplitude and depth, at the source point, and relative run-up. It can be used tocalculate easily and promptly the run-up associated with a generic landslide-generated tsunami.
|Numero di pagine||17|
|Stato di pubblicazione||Published - 2018|
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