Pressure waves generated by fast seabed movement in weakly compressible sea water, namely hydro-acoustic waves travel at the sound celerity in water (about 1500 m/s). These waves are precursors of the counterpart long free-surface gravity waves and contain significant information on the tsunamigenic source. Measurement of hydro-acoustic waves can therefore anticipate the tsunami arrival and significantly enhance the promptness and accuracy of tsunami early warning systems. In this paper

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... on of a novel depth-integrated numerical model for reproduction of hydroacoustic waves is presented and the application of this computationally efficient model on two devastating historical tsunamis of Mediterranean Sea in real bathymetry analyzed to reveal the effect of variable bathymetry. On the basis of the model results, some hints for deep sea observatory are given.