Comparison of the effects between single and multiple scattering on coda waves for local earthquakes
Comparison of the effects between single and multiple scattering on coda waves for local earthquakes
复制标题
单次和多次散射对局地地震尾波影响的比较
DOI：
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发表时间：
1983
影响因子：
3
通讯作者：
K. Aki
中科院分区：
文献类型：
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作者：
L. Gao;Lou‐Chuang Lee;N. Biswas;K. Aki
通过对单次散射理论的推广，研究了多次散射对尾波的影响。数值计算了均匀分布的各向同性散射体在二维无限大弹性介质中的多次散射对尾波功率的贡献。结果表明，在较短的时间内，尾波功率可以用单次散射理论很好地解释。在较长的时间内，需要考虑多次散射的影响。忽略多次散射导致对品质因数(Q)值的高估，高估了1.4倍。
The effects of multiple scattering on coda waves have been investigated by an extension of the single-scattering theory. The contributions to the coda power due to multiple scattering from a uniform distribution of isotropic scatterers in a two-dimensional infinite elastic medium have been numerically evaluated. The results show that at shorter lapse time, the coda power is well explained by the single-scattering theory. At longer lapse time, the effects of multiple scattering need to be considered. The neglect of multiple scattering gives rise to an overestimation of the values of the quality factor ( Q ) by a factor of 1.4.