Records of Co-seismic Uplift and Tsunami Inundation Associated with the 2024 Noto Peninsula Earthquake using Advanced Surveying Technology

Abstract

This study has aimed to preserve the damage caused by the 2024 Noto Peninsula earthquake in digital space and investigate the relationship between co-seismic uplift and tsunami inundation. In order to analyze this relationship, we have conducted field surveys incorporating LiDAR-SLAM and CLAS, and utilized pre-seismic digital elevation models, aerial photographs, and fundamental geospatial data. LiDAR-SLAM survey data are an important record of disaster damage, and the disaster area can therefore be preserved in digital space. Co-seismic uplift was measured using two methods: surveys based on LiDAR-SLAM and CLAS. All of the methods showed a trend of increased co-seismic uplift in the northwestern part of the peninsula. Among the ports where the tsunami traces were confirmed during the field survey, it was found that the houses around the port of Noroshi in the northeastern part of the peninsula were spared from inundation due to co-seismic uplift. However, around the port of Otani, the elevation of the houses was high, thus suggesting that the mitigation of tsunami inundation by co-seismic uplift was minimal. The area around the port of Jike experienced significant tsunami inundation damage due to both high tsunami waves and low elevation of houses, regardless of co-seismic uplift.