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Eastern Sicily is affected by earthquakes and tsunamis of localand remote origin, which is known through numerous historical chronicles.Recent studies have put emphasis on the role of submarine landslides as thedirect cause of the main local tsunamis, envisaging that earthquakes (in 1693and 1908) did produce a tsunami, but also that they triggered mass failuresthat were able to generate an even larger tsunami. The debate is still open,and though no general consensus has been found among scientists so far, thisresearch had the merit to attract attention on possible generation oftsunamis by landslides off Sicily. In this paper we investigate the tsunamipotential of mass failures along one sector of the Hyblean-Malta Escarpment(HME). facing Augusta. The HME is the main offshore geological structure ofthe region running almost parallel to the coast, off eastern Sicily. Here,bottom morphology and slope steepness favour soil failures. In our work westudy slope stability under seismic load along a number of HME transects byusing the Minimun Lithostatic Deviation (MLD) method, which is based on thelimit-equilibrium theory. The main goal is to identify sectors of the HMEthat could be unstable under the effect of realistic earthquakes. We estimatethe possible landslide volume and use it as input for numerical codes tosimulate the landslide motion and the consequent tsunami. This is animportant step for the assessment of the tsunami hazard in eastern Sicily andfor local tsunami mitigation policies. It is also important in view oftsunami warning system since it can help to identify the minimum earthquakemagnitude capable of triggering destructive tsunamis induced by landslides,and therefore to set up appropriate knowledge-based criteria to launch alertto the population

advances in geosciences

Earthquake-triggered landslides along the Hyblean-Malta Escarpment (off Augusta, eastern Sicily, Italy) – assessment of the related tsunamigenic potential