黑龙江省大地电场观测数据的分析与应用

ANALYSIS OF OBSERVATION DATA OF GEOELECTRIC FIELD DATAIN HEILONGJIANG PROVINCE

首先对黑龙江省7个大地电场观测台站的概况进行了简单的介绍,然后评估了大地电场观测数据的效能,分析了大地电场观测的日变化特征和干扰因素以及大地电场的正常场和异常信息。结果表明,典型的干扰主要有降雨、共用电极和地磁暴,其中大磁暴干扰一般会出现在高频信号中并破坏正常的日变形态,其主要表现为多个台站同时出现异常信号。在观测系统和环境因素正常的情况下,只有绥化台、德都台、肇东台、通河台、林甸台、望奎台的大地电场观测曲线有明显的日变化形态,其与地磁日变化形态相似,而密山台由于受到严重的干扰,大地电场观测曲线没有出现较好的日变形态。另外,笔者对一些可能与地震相关的异常现象进行了初步的分析探讨。

Firstly, we introduce the situation of the seven geoelectric field stations in Heilongjiang Province. Then the evaluation results on the observation data of effectiveness are introduced. The daily variation characteristics and normal and abnormal changes of the geoelectric field are analyzed. The results show that typical interferences are mainly of rainfall, a common electrode and storm. Big storm interference generally show a high frequency signal disrupting the shape of normal daily variation which are recorded synchronously at each station. Usually, only at the stations of Suihua, Dedu, Zhaodong, Tonghe, Lindian, Wangkui observation curve presents obvious diurnal variation, which similar to the daily variation of geomagnetic field in shape. At Mishan station data is severely disrupted, and cannot be in better shape of diurnal variation. Finally, some possible anomalous phenomena associated with earthquakes are discussed.