The Alexandria’s coastal zone suffered from disastrous tsunamigenic earthquakes; the 142, 365, 1303, and 1222 earthquakes that were mainly produced from the Hellenic and Cyprian arcs. We focused on the Alexandria middle coastal zone to investigate tsunami propagation and inundation by adopting the assumed fault models for the earthquakes. Using TUNAMI (Tohoku University’s Numerical Analysis Model for Investigation) code, we performed numerical simulations and constructed inundation maps. We downloaded bathymetry data of GEBCO 30 arc-sec and topographic data of SRTM 1 arc-sec. We divided the computation domain into four grids, such as the finest grid represented inundated area merging GEBCO and SRTM data. We set six coastal output points along the Egyptian shoreline including the real Alexandria gauge to study tsunami height and arrival time. Moreover, we picked out five important points to evaluate tsunami run-up height and inundated depth. Our computation results showed that the first wave arrived at the coastline of the Alexandria after 62 min of the 142 earthquake with the maximum tsunami run-up height of 6.48 m and inundated depth of 7.63 m. While, the 1222 source closest to Alexandria had the maximum tsunami run-up height of 0.55 m and inundated depth of 1.2 m. Computed inundation maps showed that the 142 event covered the largest inundation area than other events. For all sources, the western inundated areas were much wider than the eastern inundated areas.
Keywords: Alexandria, Tsunami Propagation, Tsunami Heights, Run-Up Heights, Inundation Depth.