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Synthesis of a Tsunami spectrum in a semi-enclosed basin using its background spectrum

机译：利用背景光谱合成半封闭盆地海啸光谱

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摘要

We explained spectra of distant tsunamis observed in enclosed basins by applying the synthesis method based on joint analysis of tsunami and background spectra from a number of stations. This method is the generalization of the method proposed by RABINOVICH (J. Geopys. Res. 102, 12663-12676, 1997) to separate source and topography effects in recorded tsunami waves. The source function is extracted by inversion of the tsunami/background spectra averaged from many observational sites. The method is applied to the 2009 Papua tsunami observed at the Owase tide station in southwest Japan, a region with complicated topography and numerous bays and inlets. The synthesized spectrum explains the observed spectral amplitudes for each frequency component. It is shown that averaging of tsunami and background from various tide gauge stations in semi-enclosed basins is an efficient approach to extract the source function.
机译：我们通过应用基于海啸和来自多个台站的背景光谱联合分析的合成方法，解释了在封闭盆地中观察到的遥远海啸的光谱。该方法是RABINOVICH（J. Geopys。Res。102，12663-12676，1997）提出的用于分离记录的海啸波的源和地形影响的方法的推广。源函数是通过对许多观测站点平均的海啸/背景光谱进行反演而提取的。该方法适用于在日本西南部Owase潮汐站观测到的2009年巴布亚海啸，该地区地势复杂，海湾和入口众多。合成频谱解释了每个频率分量的观测频谱幅度。结果表明，对半封闭盆地不同潮汐台站的海啸和本底求平均值是提取源函数的有效方法。

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