摘要
对青海省现有的5个地电场观测台(点)场地背景及布极方式进行了介绍,并对2015~2016年间地电场观测资料进行了连续率与完整率计算。其中,都兰地震台连续率与完整率均达到99.8%以上。同时,对反应观测质量的相关系数与归零差值进行了计算,结果显示,都兰地震台观测质量为5个台站中最高,其各测向长短极距相关系数平均为0.98以上,各测向平均归零差值低于0.08 mv/km。在此基础上,对地电场的年变化、日变化、暴时变化以及供电干扰的典型形态及青海省2次6.0级以上显著地震前后的地电场观测曲线进行了分析。
In this paper, observation background and mode for arranging the electrodes of the 5 observatories have been introduced. And calculated continuity and integrity rate of data from 2015 to October 2016. The re- sults show that Dulan seismic station has the both rates above 99. 8%. The correlation coefficient and zero difference have been calculated at the same time, and Dulan seismic station has the best observation data. Ev- ery observation directions has a correlation coefficient above 0. 98 and even zero difference is less than 0.08 mv/km. Furthermore, the classical configurations of annual variation, daily variation, change during magnetic and electric storms and intefferencs during power supply are analyzed. And the observation curves during two M≥6.0 earthquakes are analyzed. For the two earthquakes were both happened during strong mag- netic storms, and the geo-electricity signals before earthquakes could notbe found.
出处
《高原地震》
2017年第3期1-10,共10页
Plateau Earthquake Research
关键词
地电场特征
相关系数
归零差值
青海
Geo-electricity characteristic
Correlation coefficients
Zero difference
Qinghai
