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On the 1 st of November 1755, a major earthquake of estimated Mw=8.5/9.0 destroyed Lisbon (Portugal) and was felt in whole Western Europe. It generated a huge tsunami which reached coastlines from Morocco to Southwestern England with local run-up heights up to 15 m in some places as Cape St Vincent (Portugal). Important waves were re- ported in Madeira Islands and as far as in the West Indies where heights of 3 m and damages are reported. The present knowledge of the seismic source(s), presented by numerous studies, was not able to reproduce such wave heights on the other side of the Atlantic Ocean whatever the tested source. This could be due to the signal dispersion during the propaga- tion or simply to the lack of simulations with high resolution grids. Here we present simulations using high resolution grids for Guadeloupe Archipelago for two different sources. Our results highlight important wave heights of the range of 1 m to more than 2 m whatever the source mechanism used, and whatever the strike angle in some particular coastal places. A preliminary investigation of the resonance phenomenon in Guadeloupe is also presented. In fact, the studies of long wave impact in harbours as rissaga phenomenon in the Mediterranean Sea leads us to propose the hypothesis that the 1755 waves in the West Indies could have been amplified by resonance phenomenon. Most of the places where amplification takes place are nowadays important touristic destinations.

The 1755 Lisbon Tsunami in Guadeloupe Archipelago: Source Sensitivity and Investigation of Resonance Effects