汕头地震台分量应变同震记录特征-华南地震

文章信息/Info

Title:: Coseismic Record Characteristic of Component Strain of Shantou Seismic Station

作者:: 张才剑1; 洪千盛2; 游爱生2; 郑水军1; 张印爱1; 曾华1; 1. 信宜地震台，广东信宜 525300；2. 汕头地震台，广东汕头 515063

Author(s):: ZHANG Caijian1; HONG Qiansheng2; YOU Aisheng2; ZHENG Shuijun1; ZHANG Yinai1; ZENG Hua1; 1. Xinyi Seismic Station，Xinyi 525300，China；2. Shantou Seismic Station，Shantou 515063，China

摘要:: 回顾汕头地震台四分量钻孔应变对地震的记录特点，分析了同震记录与震中距、持续时间的相关性。分析发现，汕头台分量应变的同震记录持续时间和震级正相关，也与震中距大小正相关。另外，不同方向的记录具有方向性特点，即同震记录的震荡强度与地震发生的方位相关，一般与地震方位垂直的分量响应较大、平行的响应较小，这与汕头台临近水库降雨加载的特点相似，都是垂直于加载方向的响应较大。

Abstract:: This paper reviews the record characteristics of the four-component borehole strain on the earthquake in the Shantou Seismic Station，and analyzes the correlation between the coseismic record and the epicentral distance and duration. The results show that the coseismic record duration of component strain in Shantou Station is positively correlated with the magnitude and also positively correlated with the epicenter distance. In addition, the records in different directions have directional characteristics，which means that the oscillating intensity of the coseismic record is related to the direction of the earthquake occurrence. Generally, the component response perpendicular to the earthquake azimuth is large, and the parallel response is small，which is similar to the characteristics of rainfall loading in the reservoir near the Shantou station, and the response is perpendicular to the loading direction.