Determination of the isotropic component of the 1994 Bolivia Deep Earthquake

Determination of the isotropic component of the 1994 Bolivia Deep Earthquake
复制标题

1994 年玻利维亚深地震各向同性成分的测定

DOI:
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发表时间:
1995
期刊:
影响因子:
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通讯作者:
H. Kawakatsu
H. Kawakatsu
中科院分区:
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文献类型:
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作者:
T. Hara;K. Kuge;H. Kawakatsu

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我们确定了1994年玻利维亚深源地震矩张量的各向同性分量,使用各种地震波,包括体波,面波,和正常模式的数据,在20 s和1000 s之间的周期带。我们仔细研究各向同性组件是否可以独立于其他组件通过检查相关矩阵。我们表明,它是可能的,以获得一个精确的各向同性分量的估计,通过使用正常模式的数据在550和1000 s之间的周期带。我们发现,玻利维亚地震没有一个显着的各向同性分量在这个周期带。
We determine the isotropic component of the moment tensor of the 1994 Bolivia deep earthquake using various seismic waves, including body waves, surface waves, and normal mode data, in the period band between 20 s and 1000 s. We carefully investigate whether the isotropic component can be obtained independently from the other components by checking the correlation matrices. We show that it is possible to obtain a precise estimate of the isotropic component by using normal mode data in the period band between 550 and 1000 s. We find that the Bolivia earthquake did not have a significant isotropic component in this period band.