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首页> 外文期刊>Tectonophysics: International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth >Synthesizing sea surface height change including seismic waves and tsunami using a dynamic rupture scenario of anticipated Nankai trough earthquakes
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Synthesizing sea surface height change including seismic waves and tsunami using a dynamic rupture scenario of anticipated Nankai trough earthquakes

机译：使用预期的南开槽地震的动态破裂情景，在包括地震波和海啸的综合

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摘要

The development of offshore observation technology will provide researchers with tsunami records from within an earthquake focal area, but this will create new problems. Because seismic waves coexist with tsunami inside a focal area, the seismic waves could act as noise for the tsunami signal. This study shows an efficient method to calculate sea surface height change caused by an earthquake including both seismic waves and tsunami. Simulation results indicate that seismic waves overlap with tsunami; both affect the change in sea surface height although most previous tsunami studies have neglected the contribution of seismic waves. We also numerically simulated the sea-surface displacement wavefield and hypothesized results for an anticipated rupture scenario of a huge earthquake that may possibly occur in the Nankai Trough, Japan. The synthesized record could be used to evaluate the performance of a real-time tsunami prediction method. Additionally, we discussed the similarity and difference between two kinds of tsunami waveforms: the displacement of the sea surface and the pressure change at the sea bottom. Although seismic waves appeared in both waveforms, the contribution of seismic waves was lower in the displacement at the sea surface than in the pressure change at the sea bottom.
机译：海上观察技术的发展将为研究人员提供来自地震焦点区域内的海啸记录，但这将产生新的问题。因为地震波在焦点区域内与海啸共存时，所以地震波可以充当海啸信号的噪音。该研究表明了一种有效的方法来计算由包括地震波和海啸的地震引起的海面高度变化。仿真结果表明，地震波与海啸重叠;两者都影响海面高度的变化，尽管最前以前的海啸研究忽视了地震波的贡献。我们还在数值上模拟了海面位移波场和假设结果，以便在日本南开槽中可能发生的巨大地震的预期破裂场景。合成的记录可用于评估实时海啸预测方法的性能。此外，我们讨论了两种海啸波形之间的相似性和差异：海面的位移和海底的压力变化。尽管在两个波形中出现地震波，但海表面的位移在海底的位移中的贡献比海底的压力变化较低。

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