After the NOTO Peninsula earthquake of 2024 Analysis of Population flow in the disaster area -Examination using KDDI Location analyzer-

Abstract

In Wajima City, Ishikawa Prefecture, which was hit by the 2024 Noto Peninsula Earthquake, many residents have been forced to live as evacuees for a long period of time due to the pro- longed restoration of infrastructure. In this study, time-series clustering of the nighttime pop- ulation trends in 26 areas in Wajima City obtained from the KDDI Location Analyzer was conducted, and each area was classified based on the medium- to long-term trend of the nighttime population flow. As a result, we succeeded in visualizing the time lag between the time of the earthquake and the peak of the nighttime population, and the progress of recovery and reconstruction plans. The difference in the speed of recovery of the nighttime population between regions indicates the time required for the return of the resident population and pro- vides insight into the current status of the affected areas during the recovery process.