Tsunami wave characteristics in Sendai Bay, Japan, following the 2016 Mw 6.9 Fukushima earthquake

被引：6

作者：

Cheng, An-Chi ^{[1
]}

Suppasri, Anawat ^{[1
,2
]}

Heidarzadeh, Mohammad ^{[3
]}

Adriano, Bruno ^{[1
,2
]}

Chua, Constance Ting ^{[2
]}

Imamura, Fumihiko ^{[1
,2
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Civil & Environm Engn, 6-6-06 Aoba, Sendai 9800845, Japan

[2] Tohoku Univ, Int Res Inst Disaster Sci, 468-1 Aoba, Sendai 9800845, Japan

[3] Univ Bath, Dept Architecture & Civil Engn, Bath BA2 7AY, England

来源：

OCEAN ENGINEERING | 2023年 / 287卷

关键词：

Earthquake; Tsunami; Japan; Fukushima; Numerical modelling; Spectral analysis;

D O I：

10.1016/j.oceaneng.2023.115676

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

On 21 November 2016, a Mw 6.9 intraplate earthquake occurred off the Fukushima coast in Japan, triggering a moderate-size tsunami with amplifications and long oscillations along the Sendai Bay coast. Here, we apply a hybrid approach to hindcast the wave characteristics in the Sendai Bay during the 2016 tsunami event, by analyzing coastal tide records, spectral analyses, and tsunami simulations. Our analysis shows that tsunami wave on tide stations mainly carried wave periods of 3.8-22.5 min, triggered by source periods of 18.5-22.5 min. The long oscillation in Sendai Bay was due to longer period of >28.8 min, affected by the presence of edge waves and oscillation of Sendai Bay. High-energy wave was found to be significant in most oscillation periods inside the Sendai Bay and around the Oshika Peninsula. The spatial distribution of maximum spectral and simulated tsunami amplitudes also reveal that the radiated tsunami energy was entrapped in the nearshore areas, resulting in resonance amplifications in the Sendai Bay.

引用

页数：17

共 41 条

[1] Tsunami source and inundation features around Sendai Coast, Japan, due to the November 22, 2016 Mw 6.9 Fukushima earthquake [J].