【摘要】 利用荣昌地区数字地震波资料,计算该区S波分裂参数,使用获得的S波分裂参数研究汶川地震对荣昌地区介质的影响。结果表明,汶川地震前后快波偏振方向无显著改变,均与区域范围内断裂及断层走向相关性较好;随着汶川地震的临震,延迟时间增大,而震后大约1年多的时间内,S波分裂的快、慢波延迟时间维持在较小的水平,之后延迟时间出现恢复性增大,并表现出与荣昌地震活动相关的特征。更多还原

【Abstract】 Use digital seismic data in Rongchang to calculate S-wave splitting parameters in this area,and then use the parameters obtained to study the effect of Wenchuan earthquake to the media in Rongchang.The result indicates that the distribution of fast shear-wave polarization direction is consistent wish the fault in this area before and after Wenchuan earthquake;delay time increased with Wenchuan earthquake approaching,and maintained at a smaller level in about one year after Wenchuan earthquake,then the delay time turned back,and the result associated with the seismic activity in this area.更多还原