夏县中心地震台地电场观测数据质量评价与特征分析

Quality Evaluation and Characteristic Analysis of Geoelectric Field Observation Data of Xiaxian Central Seismic Station

选取夏县中心地震台新建观测场地2019年正式观测以来的地电场数据,从连续率、完整率、相关系数、归零差值和分量合成效果五方面对观测数据进行质量评价,分析了日变形态、极化和干扰特征。结果表明,该台地电场观测系统运行稳定,观测场地周边未发现持续干扰源,观测数据质量较高;地电场日变形态呈“峰-谷”型,极化特征为线极化,极化方位角为北偏东20°,干扰特征主要为阶变、漂移和突跳等。

Based on the data of geoelectric field since the official observation of Xiaxian central seismic station in 2019,the quality of the data is evaluated from the aspects of continuity,integrity,correlation coefficient,return to zero difference and component synthesis effect,and the features of daily variation,polarization and interference are analyzed.The results show that the observation system of geoelectric field runs stably.No continuous interference source is found around the observation site,and the quality of observation data is high.The daily variation of geoelectric field is in the form of"peak valley",the polarization feature is linear polarization,the polarization azimuth angle is 20°to the east by North,and the interference feature is mainly step change,drift and jump.