PRELIMINARY SURVEY OF FLOODED AREA AND DAMAGES CAUSED BY REIWA6 NOTO PENINSULA EARTHQUAKE TSUNAMI IN HEGURAJIMA ISLAND, WAJIMA CITY, ISHIKAWA PREFECTURE, JAPAN

Abstract

 This study reports the results of a flooded area survey using a handheld GPS in Hegurajima Island, Ishikawa Prefecture, following the Noto Peninsula Earthquake and Tsunami in Reiwa 6. The northeastern and southwestern parts, outside the seawall, experienced extensive flooding. The maximum elevation of flooded areas was estimated to be more than 6 meters in these areas. In contrast, it was within 3 to 4 meters in the eastern part behind the seawall. Significant building damage was observed in the northeastern and southern parts, including damage from the tsunami on lower floors. The coast of Hegurajima Island consists of flat pebbles, and the collision of these pebbles likely contributed to the overall damage to the building in addition to the wave force of the tsunami.