Tsunami waveform inversion incorporating permanent seafloor deformation and its application to tsunami forecasting
Tsunami waveform inversion incorporating permanent seafloor deformation and its application to tsunami forecasting
复制标题
结合永久海底变形的海啸波形反演及其在海啸预报中的应用
DOI:
10.1029/2011jb008877
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发表时间:
2012
影响因子:
--
通讯作者:
H. Fujimoto
中科院分区:
文献类型:
--
作者:
H. Tsushima;R. Hino;Y. Tanioka;F. Imamura;H. Fujimoto
[1] We propose a method of tsunami waveform inversion to accurately estimate a tsunami source by incorporating the effect of permanent seafloor deformation recorded by ocean-bottom pressure gauges (OBPGs) within the source region. We developed a general expression of water-depth fluctuation recorded at an OBPG following seafloor deformation of arbitrary spatiotemporal distribution. By assuming that coseismic rupture propagates with infinite velocity, the general expression can be reduced to an equation relating observed OBPG waveforms to initial sea-surface displacement at the source by using a Green's function consisting of two terms: the Green's function used in regular tsunami inversion and a correction term to account for water-depth change in response to permanent seafloor deformation. By using the two-term Green's functions, the effect of seafloor deformation can be taken into account in tsunami source estimation. We applied the revised inversion method to observations of coseismic seafloor deformation and tsunami during the 2003 Tokachi-oki earthquake (Mw 8.3) at two OBPG stations near the Kuril Trench. The tsunami source model we estimated is consistent with models previously derived using various other geophysical data sets. Furthermore, the coastal tsunami waveforms we modeled match the observed tsunami well. Forecasts of tsunami arrival times and first peak amplitudes by our method can be obtained 20 min after an earthquake, and can be provided to the coastal communities nearest to the source with a lead time of ∼10 min.
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影响因子:
3
作者:
Fujii, Yushiro;Satake, Kenji;Kanazawa, Toshihiko
通讯作者:
Kanazawa, Toshihiko
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
宝田美佳;郡山恵樹;森和俊;堀修;大矢裕一;大島堅一;鈴木淳史;藤井雄士郎・堂山俊貴・佐竹健治・綿田辰吾・楠本聡,
通讯作者:
藤井雄士郎・堂山俊貴・佐竹健治・綿田辰吾・楠本聡,
影响因子:
3
作者:
Maeda, Takuto;Furumura, Takashi;Shinohara, Masanao
通讯作者:
Shinohara, Masanao
影响因子:
4.6
作者:
Nosov, M. A.;Kolesov, S. V.
通讯作者:
Kolesov, S. V.
DOI:
--
发表时间:
2006
期刊:
Earth Planet Space 58
影响因子:
--
作者:
Tanioka;Y.;Nishimura;Y.
通讯作者:
Y.