Radial modes from the great 1994 Bolivian earthquake: No evidence for an isotropic component to the source
Radial modes from the great 1994 Bolivian earthquake: No evidence for an isotropic component to the source
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1994 年玻利维亚大地震的径向模式：没有证据表明震源存在各向同性成分
DOI：
10.1029/96gl00375
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发表时间：
1996
影响因子：
5.2
通讯作者：
E. Okal
中科院分区：
文献类型：
--
作者：
E. Okal
我们调查了一个可能的各向同性组件在1994年6月9日玻利维亚地震的源通过研究的径向模式PS 0（p = 0，1）激发的事件。我们的研究出发，从以前类似的尝试，通过使用足够的持续时间（超过116天）的时间序列采样的基本径向模式0 S 0的谱线的形状，并通过结合两个径向模式的测量，从而解除偏和各向同性的激发源之间的权衡。我们的结果（主双力偶的0.5 ± 1.3%的各向同性分量）未能识别出这场有记录以来最大的深源地震的震源体积的显着变化。
We investigate a possible isotropic component in the source of the Bolivian earthquake of 09 June 1994 through a study of the radial modes p S 0 (p = 0,1) excited by the event. Our study departs from previous similar attempts by making use of a time series of sufficient duration (over 116 days) to sample the shape of the spectral line of the fundamental radial mode 0 S 0 , and by combining measurements of two radial modes, thereby lifting the trade-off between deviatoric and isotropic sources of excitation. Our result (an isotropic component of 0.5 ± 1.3% of the main double-couple) fails to identify a significant change in volume in the source of this, the largest deep earthquake ever recorded.