Source estimation of the 1703 Genroku tsunami through geological surveys and numerical simulations on Hachijo Island

Abstract Hachijo Island, part of the Izu-Ogasawara Islands, is situated near major plate boundaries, including the Nankai Trough, Sagami Trough, and Izu-Ogasawara Trench, making it highly susceptible to tsunamis triggered by earthquakes in these regions. Despite this vulnerability, limited tsunami research has been conducted in the area. This study aimed to uncover the tsunami history of Hachijo Island through geological surveys and numerical modeling, providing insights into potential tsunami s