摘要
收集整理了琼中地震台2002~2012年地磁Z分量低点时间分布状况、分析其平均低点时间分布特征,得出其年平均低点时间集中在北京时间12点52分,主要分布范围在12点10分和13点34分之间,且不同的季节月份均有不同程度的调整和变化,以此作为判断某日低点时间异常的基础,确定低点位移异常,为地震分析预报服务,提高地震预报的准确度。
In order to analyze the average low point time distribution of geomagnetic Z component,we collected the geomagnetic Z component data in Qiongzhong seismic station from 2002 to 2012.We find that: he annual average low point time focuses on GMT12 ∶52, and are mainly distributed between GMT12:10 and GMT13:34; There are adjustment and change in varying degrees in different month and seasons. As the basis of determining whether a day low point time is abnormal, we can determine the geomagnetic low point displacement for the earthquake prediction and improve the accuracy of earthquake prediction.
引文
[1]丁鉴海,黄雪香.地磁垂直分量日变“低点位移”预报地震方法实用化研究[C]//国家地震局科技监测司编.地震预报方法实用化研究文集地磁地电专辑.北京:学术书刊出版社,1990.
[2]冯志生,李琪,李鸿宇,等.地磁低点位移线两侧异常变化的反相位现象及其解释[J].中国地震,2009,25(2):206-213.
[3]陈绍明,谢美娟.地磁垂直日变低点位移预报方法研究[C]//国家地震局科技监测司编.地震预报方法实用化研究文集地磁地电专辑.北京:学术书刊出版社,1990.
[4]李明光,梁秀兰.利用地磁Z分量日变低点预报地震的新探索[C]//国家地震局科技监测司编.地震预报方法实用化研究文集地磁地电专辑.北京:学术书刊出版社,1990.