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Synthetic seismograms for finite sources in spherically symmetric Earth using normal-mode summation

机译:球对称地球中有限源的合成地震图,使用正态模加法

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摘要

Abstract Normal-mode summation is the most rapidly used method in calculating synthetic seismograms. However, normal-mode summation is mostly applied to point sources. For earthquakes triggered by faults extending for as long as several 100?km, the seismic waves are usually simulated by point source summation. In this paper, we attempt to follow a different route, i.e., directly calculate the excitation of each mode, and use normal-mode summation to obtain the seismogram. Furthermore, we assume the finite source to be a “line source” and numerically calculate the transverse component of synthetic seismograms for vertical strike-slip faults. Finally, we analyze the features in the Love waves excited by finite faults.
机译:摘要正模求和是计算合成地震图最快速的方法。但是,正常模式求和主要应用于点源。对于由长达100?km的断层引起的地震,通常通过点源求和来模拟地震波。在本文中,我们尝试遵循不同的路径,即直接计算每种模式的激励,并使用正态模式求和来获得地震图。此外,我们假设有限震源是“线震源”,并通过数值计算了垂直走滑断层的合成地震图的横向分量。最后,我们分析了有限断层激发的爱波的特征。

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