地震学报（英文版）2008，Vol.21Issue(4)：344-357,14.
Shear-wave splitting before and after the 1999 Xiuyan earthquake in Liaoning, China
Shear-wave splitting before and after the 1999 Xiuyan earthquake in Liaoning, China
摘要
Abstract
Using seismic waveform data recorded at station YK (Yingkou) of Liaoning Telemetry Digital Seismic Network, this paper studied the characteristics of shear-wave splitting before and after the Xiuyan Ms5.9 (M15.3) earthquake in November 29, 1999 with SAM method. The results show that the predominant polarizations of fast shear-waves at YK is in direction of ENE-WSW, consistent with the direction of regional principal compressive stress and also consistent with the direction of the regional tectonic stress field in North China; time-delays increasing before Xiuyan earthquake may shows accumulation of stress before earthquake. The predominant polarizations of fast shear-waves at YK are also related to the spatial distribution of small earthquakes and correlate with the fault strike. The histogram of monthly average polarizations of fast shear-waves shows that polarizations of fast shear-waves also seems to change from two months before the earthquake, but it still needs more data for verification.关键词
Xiuyan earthquake/shear-wave splitting/polarization/time delayKey words
Xiuyan earthquake/shear-wave splitting/polarization/time delay分类
天文与地球科学引用本文复制引用
TAI Ling-xue,GAO Yuan,CAO Feng-juan,SHI Yu-tao,WU Jing,JIAO Ming-ruo..Shear-wave splitting before and after the 1999 Xiuyan earthquake in Liaoning, China[J].地震学报（英文版）,2008,21(4):344-357,14.基金项目
Basis and Special Research Foundation, Institute of Earthquake Science, China Earthquake Administration (2007-24). （2007-24）
