Shear-wave splitting of Sichuan Regional Seismic Network

被引：1

作者：

张永久 ^{[1
]}

高原 ^{[2
]}

石玉涛 ^{[2
]}

程万正 ^{[1
]}

机构：

[1] Earthquake Administration of Sichuan Province

[2] Institute of Earthquake Science, China Earthquake Administration

来源：

Acta Seismologica Sinica(English Edition) | 2008年 / 02期

关键词：

shear-wave splitting; polarization of fast shear-wave; compression axis; active fault; Sichuan region;

D O I：

暂无

中图分类号：

P315.31 [];

学科分类号：

070801 ;

摘要：

<正>Using seismic data recorded by the Chengdu Digital Seismic Network from May 1, 2000 to December 31, 2006, we obtain the dominant polarization directions of fast shear-waves at eight digital seismic stations adopting the SAM technique. The results show that the dominant directions of polarizations of fast shear-waves at most of sta-tions are mainly in nearly NE-SW or NW-SE direction in Sichuan. The dominant polarization directions of the fast shear-waves at stations located at the active faults or intersection of several active faults are consistent with the strikes of active faults which control the earthquakes used in the analysis, and are basically consistent with the directions of regional compression axis. However, several stations show that the fast shear-waves are not consis-tent with the strikes of active faults and the directions of regional compression axis, due to the influence of local complicated crustal structure.

引用

页码：127 / 138+219 +219

页数：13

共 24 条

[1] Determinations of directions of the mean stress field in Sichuan-Yunnan region from a number of focal mechanism solutions [J].