Consideration of submarine landslide induced by 2018 Sulawesi earthquake and tsunami within Palu Bay

On September 28 2018, an Mw 7.5 strike-slip earthquake occurred to the north of Palu Bay on Sulawesi Island, Indonesia. This triggered a destructive tsunami within bay, which reached city. Simulation have been conducted investigate landslide source. However, should be investigated considering physical model in area where detailed bathymetric survey had not conducted. In this study, we impact coastal landslides southern part bay using two-layer model. Owing increasing collapse volume, west could approximately explain observations calculated mass volume source largely overestimated data. Hence, considered possibility submarine and simulation results maximum heights bay. These suggest that more multibeam data will required possible induce reaching city few minutes after collapse.