四川小庙和南山地震观测站形变潮汐响应特征及映震能力分析  

Analysis of the deformation tidal response characteristics and seismic reflecting ability of Xiaomiao and Nanshan seismic observation stations in Sichuan Province

作　　者：徐亚飞 周朝晖[1] 张晓明[1] 张菊 XU Yafei;ZHOU Chaohui;ZHANG Xiaoming;ZHANG Ju(Sichuan Earthquake Agency,Chengdu 610041,China)

机构地区：[1]四川省地震局,成都610041

出　　处：《地震地磁观测与研究》2023年第6期101-108,共8页Seismological and Geomagnetic Observation and Research

基　　金：四川省地震局地震科技专项(项目编号:LY2311)。

摘　　要：选取西昌小庙、攀枝花南山地震观测站VP、VS型垂直摆倾斜仪,采用潮汐调和分析方法,对潮汐因子、相对噪声等指标进行计算和分析,发现观测资料整体稳定性较好,观测精度基本符合要求;各指标存在差异多由观测系统问题所致,自然环境、场地环境干扰影响轻微,数据可靠性较高,映震能力较强。采用小波方法分析6.0级以上震例,发现异常反映可能存在一定方向性,与构造、地质及震中距和台基岩性等有关。We select the VP and VS vertical pendulum inclinometers at the Xichang Xiaomiao and Panzhihua Nanshan seismic observation stations,using the tidal harmonic analysis method to calculate and analyze the indicators such as tidal factor and relative noise.The result shows that the overall stability of observation data is good,and observation accuracy basically conforms to the requirements.The difference in each indicator is mostly caused by the observation system.Data has high reliability and strong seismic reflecting ability in the slight interference of the natural environment and site environment.We use the wavelet method to analyze the earthquake cases with a magnitude of 6.0 or above and discover that the abnormal reflection may have a certain directionality,which is connected with structure,geology,epicenter distance,and bedrock properties.

关 键 词：垂直摆 干扰因素 质量评估 小波分析 

分 类 号：P315.7[天文地球—地震学]