摘要
地电场观测系统的观测对象是地电场强度矢量,其目的是通过观测地表的地电场强度,探索地震前地电场的变化,获得地下电性结构及其变化规律,开展孕震过程中大地电场的变化特征研究。本文对翁田台地电场自建台以来的数据进行了详细的梳理,通过计算差值和相关系数来分析数据自运行以来的质量情况,总结数据质量较好的原因,并对下一步如何提高数据质量给出一些建议。翁田台地电场观测数据曲线存在明显1峰1谷的日变形态,对其进行频谱分析,优势周期为24、12、6 h,以24 h为主。运用优势方位角的方法计算发现,2017—2018年优势方位角存在收窄和偏转现象,对该异常进行了分析与探讨。
The observation object of the geoelectric field observation system is the geoelectric field intensity vector.Its purpose is to explore the change of the geoelectric field before earthquake,to obtain the electrical structure and its change law of underground and rock layer,and to develop the change characteristics of the geoelectric field in the process of seismogenesis by observing the intensity of geo electric field on the surface.The data of Wengtian geoelectric station since its establishment are sorted out in detail,and the quality of the data since its operation is analyzed by calculating the difference and correlation,the reasons for the good data quality are summarized,and some suggestions on how to improve the data quality in the next step are given.The curve of geoelectric field observation data at Wengtian station has an obvious daily variation form of one peak and one valley.The spectrum analysis shows that the dominant periods are 24,12 and 6 hours,with 24 hours as the main period.By using the method of dominant azimuth angle,it is found that the dominant azimuth angle is narrowed and deflected from 2017 to 2018,and the anomaly is analyzed and discussed.
作者
郭明瑞
王锡娇
卢启明
李冬雅
庞雪华
郭昱琴
解晓静
Guo Mingrui;Wang Xijiao;Lu Qiming;Li Dongya;Pang Xuehua;Guo Yuqin;Xie Xiaojing(Hainan Earthquake Agency,Hainan Haikou 570203)
出处
《地震科学进展》
2024年第2期153-158,174,共7页
Progress in Earthquake Sciences
基金
海南省地震局课题(HDK202207)资助。
关键词
大地电场
日变
周期
方位角
电性结构
terrestrial electric field
daily variation
period
azimuth
electrical structure
