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Source inversion and numerical simulation of 2017 Mw 8.1 Mexico earthquake tsunami

Author

Listed:
  • Zhiyuan Ren

    (National Marine Environmental Forecasting Center)

  • Xinran Ji

    (Hainan University)

  • Peitao Wang

    (National Marine Environmental Forecasting Center)

  • Jingming Hou

    (National Marine Environmental Forecasting Center)

  • Di Shan

    (National Marine Environmental Forecasting Center)

  • Lianda Zhao

    (National Marine Environmental Forecasting Center)

Abstract

Based on the nonlinear shallow water equations and tsunami measurement, this study has presented the inversion source, which is generated by an earthquake of Mw 8.1 that occurred in Pijijiapan, Mexico, on September 8, 2017. The seafloor deformation induced by the inversed tsunami source reached maximum uplift of 0.5 m and subsidence of − 1.4 m. The numerical results simulated by the inversed source could match well with the measured data. We characterize tsunami propagation scenarios regarding tsunami amplitude and currents. Unlike the feature of tsunami wave amplitude propagation in the deep ocean, the currents induced by the tsunami are confined to shallow coasts, noted as the contour of 400 m water depth. Although most regions endure tsunamigenic currents below 3 knots (1.5 m/s) or in range of 3–6 knots (1.5–3 m/s), which is the threshold from no damage to minor–moderate damage, the duration lasting several hours indicates the potential beach erosion and sediment transport. The eddies of tsunami-induced currents could be identified at the entrance gate of lagoon named Mar Muerto with a finer grid. Finally, the dispersion effect has been investigated on tsunami propagation in the Pacific Ocean.

Suggested Citation

  • Zhiyuan Ren & Xinran Ji & Peitao Wang & Jingming Hou & Di Shan & Lianda Zhao, 2018. "Source inversion and numerical simulation of 2017 Mw 8.1 Mexico earthquake tsunami," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 94(3), pages 1163-1185, December.
    • Handle: RePEc:spr:nathaz:v:94:y:2018:i:3:d:10.1007_s11069-018-3465-y
    DOI: 10.1007/s11069-018-3465-y
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    References listed on IDEAS

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    1. R. Grimshaw & C. Yuan, 2016. "Depression and elevation tsunami waves in the framework of the Korteweg–de Vries equation," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 84(2), pages 493-511, November.
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    Cited by:

    1. Zhiyuan Ren & Yuchen Wang & Peitao Wang & Jingming Hou & Yi Gao & Lianda Zhao, 2020. "Numerical study of the triggering mechanism of the 2018 Anak Krakatau tsunami: eruption or collapsed landslide?," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 102(1), pages 1-13, May.

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