Filling in the Gaps of the Tsunamigenic Sources in 2018 Palu Bay Tsunami

The causes of 2018 Palu Bay (Indonesia) tsunami are still not entirely clear. There is an ongoing debate on whether the main cause waves observed was a significant co-seismic tectonic event which occurred underwater or it multiple landslides detected along coast and triggered by earthquake. Data from paper Liu et al. [2] in bathymetry bay analysed suggests that landslide-induced may have contributed significantly to tsunami. However, data presented incomplete, information regarding starting time, magnitude these coastal landslide progression has uncertainties. In this paper, we model each landslide-generated wave with COMCOT track propagation understand their individual contribution at several relevant locations inside where free surface elevation available. We then explore feasible scenarios (i.e. configurations timings) produce as close those using optimization technique based genetic algorithms. Numerical simulations chosen scenario point out likely contributors tsunami, they can arrive very fast, precise timing, interest trigger natural resonant modes bay, producing long-period were also observed.