摘要
将跨断层场地的辅助测线应用于跨断层形变资料的数据处理中,引入谱减法对沿鲜水河断裂带的5个跨断层场地进行分析处理,试图将辅助测线与跨断层测线都包含的非构造因素的影响从跨断层数据中去除,从而突出与地震发生相关的断层活动信息。结果表明:利用谱减法处理过的跨断层测线在多数场地都表现出了时频成分上较明显的异常,异常出现时间与周期特点都有较好的一致性。由鲜水河断裂带附近地震活动性可得异常在时间上存在与后续地震活动性增加相关的可能性。
This paper applied the aided measuring line of cross - fault site to the cross - fault deformation data process- ing. In order to remove the non - tectonic influence from cross - fault deformation data and highlight the infor- mation of fault activities which is related to the earthquake, we used spectral subtraction to analyze the cross - fault deformation data which are obtained along Xianshuihe fault zone and contain aided measuring line. By the processing of spectral subtraction, the results show that the cross -fault deformation data from most sites are all have obvious anomalies on time -frequency analysis. And the occurrence and the period of those anomalies are all consistent. Through analyzing the seismic activity along the Xianshuihe fault zone, the occurrence time of a- nomalies support the possibility that the anomalies are related to the increased seismic activities.
出处
《地震研究》
CSCD
北大核心
2017年第2期193-202,共10页
Journal of Seismological Research
基金
2016年度震情跟踪定向工作任务--跨断层辅助测线对非构造因素判断的应用探讨(2016010208)资助
关键词
辅助测线
跨断层测线
谱减法
非构造因素
震前异常
aided measuring line
cross -fault measuring line
spectral subtraction method
non -tecton- ic factor
anomaly before earthquake
