TSUNAMI TIME SERIES DATA EXTRACTED FROM LIVE CAMERA IMAGES OF 2024 NOTO PENINSULA EARTHQUAKE

Abstract

 Tsunamis generated by the January 1, 2024, Noto Peninsula earthquake (M7.6) were observed along the coasts of various areas of the Japan Sea. Among them, the tsunami reached the Toyama tide station earlier than the others, suggesting that there may have been another wave source in Toyama Bay other than the crustal deformation caused by the earthquake. In this study, we analyzed live camera images from Amaharashi Beach in Takaoka City and Iwasehama Beach in Toyama City, Toyama Prefecture, and extracted time series of water level data up to sunset. The analysis results for Amaharashi Beach were compared with the data from the Fushiki-port tide station, and the analysis results for Iwasehama Beach were compared with the data from the Toyama tide station. Although the time trends are similar for each site, the maximum wave heights were higher at the sites analyzed in this study, and the first wave's arrival times were also different. This result suggests that the time-series data obtained in this study can be used as independent information from tide stations and can be utilized as an instrument for real-time tsunami observation.