2023 Volume 79 Issue 17 Article ID: 23-17034
Since 2011, offshore ocean floor observation networks such as DONET and S-net have been installed off the Pacific coast of the Japanese archipelago, and real-time observations by seismographs and ocean bottom pressure gauges installed offshore have been implemented. Although research and development of tsunami forecasting technology using the offshore observation data has been conducted, an examination of tsunami prediction by coupling real-time observation network and tsunami interferometry has not been sufficient. In this study, the possibility of real-time tsunami prediction applied for tsunami interferometry using offshore observation network was investigated from the DONET area to the Wakayama Prefecture coast. The synthetic waveforms constructed using the Green's function by the tsunami interferometry showed good phase agreement for the long-period component, but it was found to be difficult to reproduce the secondary oscillation component excited in the bay. Although further validation with other event waveforms is required, the possibility of constructing synthetic waveforms that contribute to tsunami prediction using the tsunami interferometry Green's function and offshore observational data was discussed.
