Effects of seabed surface rupture versus buried rupture on tsunami wave modeling: A case study for the 2011 Tohoku, Japan earthquake
Effects of seabed surface rupture versus buried rupture on tsunami wave modeling: A case study for the 2011 Tohoku, Japan earthquake
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海床表面破裂与埋藏破裂对海啸波模型的影响：以 2011 年日本东北地震为例
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
K. Goda
中科院分区：
文献类型：
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作者：
K. Goda
摘要海啸波建模的参数研究是为了讨论一个重要的问题，即海啸模拟结果对浅倾断层面（海底表面破裂与埋藏断层破裂）的不同顶部边缘深度的敏感性。输入边界条件（即，垂直海底变形）的海啸模拟计算使用所谓的冈田方程。2011年日本东北部海啸案例研究的分析结果突出了不同顶部边缘深度参数对垂直海床变形和海啸波高的显著影响。特别是，与海底表面破裂情况相比，埋藏破裂情况下断层面外的上升水会引起大海啸波。结果适用于发生在浅深度缓倾断层面上的其他海啸地震（例如，预测的南海-托南凯地震），并有重要的影响，海啸反演应如何进行，以及如何开发的源模型应解释。在线资料：垂直形变图、最大淹没高度等值线图和淹没高度剖面图。
Abstract Parametric investigations of tsunami wave modeling are performed to discuss an important issue related to the sensitivity of tsunami simulation results to varied top‐edge depths of a shallowly dipping fault plane (seabed surface rupture versus buried fault rupture). Input boundary conditions (i.e., vertical seabed deformation) for tsunami simulation are calculated using so‐called Okada equations. The analysis results for the 2011 Tohoku, Japan, tsunami case study highlight the significant effects of varied top‐edge depth parameters on vertical seabed deformation and tsunami wave heights. In particular, the uplifted water outside of the fault plane for the buried rupture case, in comparison with the seabed surface‐rupture case, causes large tsunami waves. The results are applicable to other tsunamigenic earthquakes that occur on a gently dipping fault plane at a shallow depth (e.g., anticipated Nankai–Tonankai earthquake) and have important implications on how tsunami inversion should be carried out and how developed source models should be interpreted. Online Material: Figures of vertical deformation, maximum inundation height contours, and inundation height profiles.