Manila Trench Tsunami Source Modeling for West Kalimantan Nuclear Facility Mitigation

Abstract Tsunami modeling with the Manila Trench earthquake source, the Philippines is very necessary as one of the mitigation measures for the prospective nuclear power plant (PLTN) facility in West Kalimantan. In this preliminary study, tsunami modeling using the COMCOT of non linear and the nesting grid method was carried out to obtain an estimate of the height and arrival time of the tsunami at the closest tidal initial points of a nuclear power plant. The Manila Trench is considered as the closed potential sources of earthquake threats to the prospective nuclear power plant site in Gosong Beach, West Kalimantan. The source is divided into 33 multiple segments and accumulated to magnitude 9.1 The results of this study can be used as material for risk assessment for nuclear power plant site development. The results obtained are that the estimated tsunami height at Gosong Beach is around 0.3 – 0.5 meters on the beach with an arrival time of about 550 minutes after the earthquake at its center.