Determination of focal mechanisms of nonvolcanic tremor using S wave polarization data corrected for the effects of anisotropy
Determination of focal mechanisms of nonvolcanic tremor using S wave polarization data corrected for the effects of anisotropy
复制标题
使用校正各向异性影响的 S 波偏振数据确定非火山震颤的震源机制
DOI:
10.1002/2015gl067249
复制
发表时间:
2016
影响因子:
5.2
通讯作者:
N. Takeda
中科院分区:
文献类型:
--
作者:
K. Imanishi;T. Uchide;N. Takeda
We propose a method to determine the focal mechanisms of nonvolcanic tremors using anisotropy‐corrected S polarizations measured directly from noisy tremor signals. The successful retrieval of polarization angles in noisy signals owes much to the observation that, in general, tremors propagate slowly and therefore do not change their location immediately. This feature of tremors enables us to use longer time windows to compute polarization angles (e.g., 1 min or longer), resulting in a stack of particle motions. We applied the method to a tremor episode that occurred beneath the Kii Peninsula in April 2013. Although the majority of inferred focal mechanisms suggested that tremors manifest shear slip on the plate interface, some events with strike‐slip components were also found to have occurred. The proposed method provides us with a tool for investigating smaller‐scale spatial distributions and temporal variations of focal mechanisms throughout tremor zones.
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影响因子:
--
作者:
K. Sadakane;Y. Horikawa;M. Nagao;and H. Seto;S. Yabe and S. Ide
通讯作者:
S. Yabe and S. Ide
影响因子:
64.8
作者:
Ide, Satoshi;Beroza, Gregory C.;Uchide, Takahiko
通讯作者:
Uchide, Takahiko
DOI:
--
发表时间:
2009
期刊:
影响因子:
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作者:
Choong Geun Lee;V. G. Moshnyaga and K. Hashimoto;宮田康治
通讯作者:
宮田康治
影响因子:
56.9
作者:
Obara, K
通讯作者:
Obara, K
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Ide;S.
通讯作者:
S.