摘要
通过分析铅电极和固体不极化电极测量的地电场变化特征、地面场与区域气压及测向与附近断裂走向的关系等发现:1)2种地电场与断裂走向近垂直的测向日变幅相对较小,与断裂走向近平行的测向日变幅相对较大;2)活动断裂附近,基于铅电极测量的地电场有气压非周期变化形态,且各测向地电场和气压变化的相关性与测向和附近断裂走向的夹角有关,夹角近垂直则相关性高,随着夹角的减小相关性减弱,而基于固体不极化电极测量的地电场则没有此特征。
Using the geoelectric field measured by lead electrode and solid nonpolarized electrode,based on analysis of their variation characteristics,the relationship between them and regional pressure variation,and the relationship between measuring direction and nearby fault strike,we find that:1)The daily variation of geoelectric field measured by two kinds of electrodes near active fault are relatively small when they are vertical to fault strike,and relatively large when they are parallel to fault strike.2)The geoelectric field measured by the lead electrode near the active fault has an aperiodic variation of atmospheric pressure,and the correlation between geoelectric field and atmospheric pressure in each direction is related to the angle between the measuring direction and the strike of the nearby fault.The correlation is high when the measuring direction is nearly vertical to the strike of the nearby fault,and decreases with the decline of the angles.The geoelectric field measured by solid nonpolarized electrode does not have these characteristics.
作者
李学波
LI Xuebo(Earthquake Agency of Ningxia Hui Autonomous Region,244 East-Beijing Road,Yinchuan 750001,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2022年第2期119-124,共6页
Journal of Geodesy and Geodynamics
基金
宁夏自然科学基金(2021AAC03484)
中国地震局地震科技星火计划(XH20065Y,XH20064)
关键词
地电场
活动断裂
气压
变化特征
geoelectric field
active structure
atmospheric pressure
variation characteristics
