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As a mean to assess the risk dam structures are exposed to duringearthquakes, we employ an abstract mathematical, three dimensional,elasto-acoustic coupled wave-propagation model taking into account (i) the damstructure itself, embedded into (ii) its surrounding topography, (iii)different material soil layers, (iv) the seismic source as well as (v) thereservoir lake filled with water treated as an acoustic medium. As a case studyfor extensive numerical simulations we consider the magnitude 7 seismic eventof the 30$^{\rm th}$ of October 2020 taking place in the Icarian Sea (Greece)and the Tahtali dam around 30 km from there (Turkey). A challenging task is toresolve the multiple length scales that are present due to the huge differencesin size between the dam building structure and the area of interest, consideredfor the propagation of the earthquake. Interfaces between structures and highlynon-conforming meshes on different scales are resolved by means of adiscontinuous Galerkin approach. The seismic source is modeled using inversiondata about the real fault plane. Ultimately, we perform a real data driven,multi-scale, full source-to-site, physics based simulation based on thediscontinuous Galerkin spectral element method, which allows to preciselyvalidate the ground motion experienced along the Tahtali dam, comparing thesynthetic seismograms against actually observed ones. A comparison with a moreclassical computational method, using a plane wave with data from a deconvolvedseismogram reading as an input, is discussed.

Elasto-acoustic modelling and simulation for the seismic response of structures: The case of the Tahtal{\i} dam in the 2020 \.Izmir earthquake