PARAMETER STUDY FOR A TSUNAMI REPRODUCTIONS MODEL DUE TO 1640 KOMAGATAKE ERUPTION MOUNTAIN COLLAPSE

Abstract

 Recently, tsunamis associated with 2022 Tonga volcanic eruption also occurred, and the need for volcanic tsunami simulation has been called for. The purpose of this study is to investigate how to reproduce historical volcanic tsunamis with complex generation mechanisms and insufficient observational information. In the past, the landslide model (code: TITAN2D) was used to reproduce 1792 Mayuyama collapse tsunami, but further study is needed on the setting of soil parameters for practical use. We attempted to reproduce the collapse behavior of 1640 Komagatake eruption tsunami, obtained the input conditions for tsunami simulation. Furthermore, the influence of soil parameters on the results was evaluated separately for land and sea areas, with results suggesting what is important for the reconstruction of historical events.