Comparative Numerical Simulation of Tsunami Waves during the January 1, 2024 Noto Peninsula Earthquake, Japan

R. Kh. Mazova1, A. A. Martynenko2, A. A. Kurkin1, 3, ✉

1 Nizhny Novgorod State Technical University n. a. R. E. Alekseev, Nizhny Novgorod, Russian Federation

2 Autonomous Non-Commercial Organization of Higher Education “Central University”, Moscow, Russian Federation

3 V. I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of RAS, Vladivostok, Russian Federation

✉ e-mail: aakurkin@gmail.com

Abstract

Purpose. The object of this work is to perform a comparative numerical simulation of generation and propagation of tsunami waves induced by the M = 7.6 earthquake on January 1, 2024 on the Noto Peninsula, Ishikawa Prefecture, Japan.

Methods and Results. Four different variants of a seismic source are simulated within framework of the earthquake source keyboard mechanism. A multi-block source is considered in which, while simulating the earthquake, a sequential motion of key-blocks was specified. It is shown that the dynamics of this process in a seismic source will determine the formation of corresponding tsunami source and wave fronts propagating from this source and that the shape of earthquake source affects the values of maximum wave heights in the water area significantly. Applying the information from the tide-gauge stations in the Sea of Japan and the Tsugaru and Tatar straits permits to compare the real records of maximum values of the tsunami wave amplitudes at these stations and the computed tide-gauge ones resulted from numerical simulation of different dynamics of keyboard blocks in the seismic source.

Conclusions. This study demonstrates that the keyboard earthquake model is a viable tool for simulating complex earthquake sources, such as the one that occurred in the northwest of the Noto Peninsula and on the western coast of Honshu Island, an area home to a significant number of settlements and the largest Japanese operating nuclear power plants.

Keywords

2024 tsunami, Noto Peninsula, Japan, earthquake source, numerical simulation

Acknowledgements

The study was supported by the Laboratory of nonlinear hydrophysics and natural disasters of POI n. a. R. E. Alekseev, FEB of RAS, grant of the Ministry of Science and Higher Education of RF, agreement No. 075-15-2022-1127 dated July 1, 2022.

Original russian text

Original Russian Text © R. Kh. Mazova, A. A. Martynenko, A. A. Kurkin, 2024, published in MORSKOY GIDROFIZICHESKIY ZHURNAL, Vol. 40, Iss. 5 (2024)

For citation

Mazova, R.Kh., Martynenko, A.A. and Kurkin, A.A., 2024. Comparative Numerical Simulation of Tsunami Waves during the January 1, 2024 Noto Peninsula Earthquake, Japan. Physical Oceanography, 31(5), pp. 662-678.

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