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In this paper, we present a deterministic approach to tsunami hazardassessment for the city and harbour of Sines, Portugal, one of the test sitesof project ASTARTE (Assessment, STrategy And Risk Reduction for Tsunamis inEurope). Sines has one of the most important deep-water ports, which hasoil-bearing, petrochemical, liquid-bulk, coal, and container terminals. Theport and its industrial infrastructures face the ocean southwest towards themain seismogenic sources. This work considers two different seismic zones:the Southwest Iberian Margin and the Gloria Fault. Within these two regions,we selected a total of six scenarios to assess the tsunami impact at the testsite. The tsunami simulations are computed using NSWING, a Non-linear ShallowWater model wIth Nested Grids. In this study, the static effect of tides isanalysed for three different tidal stages: MLLW (mean lower low water), MSL(mean sea level), and MHHW (mean higher high water). For each scenario, thetsunami hazard is described by maximum values of wave height, flow depth,drawback, maximum inundation area and run-up. Synthetic waveforms arecomputed at virtual tide gauges at specific locations outside and inside theharbour. The final results describe the impact at the Sines test siteconsidering the single scenarios at mean sea level, the aggregate scenario,and the influence of the tide on the aggregate scenario. The results confirmthe composite source of Horseshoe and Marques de Pombal faults as theworst-case scenario, with wave heights of over 10 m, which reach the coastapproximately 22 min after the rupture. It dominates the aggregate scenarioby about 60 % of the impact area at the test site, considering maximum waveheight and maximum flow depth. The HSMPF scenario inundates a total area of3.5 km<sup>2</sup>

Deterministic approach for multiple-source tsunami hazard assessment for Sines, Portugal