Numerical study of the triggering mechanism of the 2018 Anak Krakatau tsunami: eruption or collapsed landslide?

Zhiyuan Ren, Yuchen Wang, Peitao Wang (), Jingming Hou, Yi Gao and Lianda Zhao
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Zhiyuan Ren: National Marine Environmental Forecasting Center
Yuchen Wang: The University of Tokyo
Peitao Wang: National Marine Environmental Forecasting Center
Jingming Hou: National Marine Environmental Forecasting Center
Yi Gao: National Marine Environmental Forecasting Center
Lianda Zhao: National Marine Environmental Forecasting Center

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2020, vol. 102, issue 1, No 1, 13 pages

Abstract: Abstract The eruption and collapse of the Anak Krakatau volcano generated tsunamis in the Sunda Strait on December 22, 2018, leading to damage and casualties. In this paper, we use the two-layer model and nonlinear shallow equation model to study the triggering mechanism of the tsunami event. We first simulate the tsunami generated by volcano eruption and landslide, respectively. The tsunami source is analyzed by comparing with gauge measurements. It indicates that the volume of partial collapse for the landslide is 0.2–0.3 km3. The comparison between the numerical results of landslide and tide gauge measurements presents well-fitted results, especially for the leading tsunami waves and arrival time. Computed maximum tsunami amplitude distribution points out that the most hazardous area is located at the south of the Sunda Strait (Pandeglang), which suffered the most casualties.

Keywords: Volcanic tsunami; Landslide tsunami; Two-layer model; Anak Krakatau; Tsunami simulation (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1007/s11069-020-03907-y

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