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地震 ›› 2001, Vol. 21 ›› Issue (3): 85-90.

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应变固体潮NaKai拟合检验及潮汐变化的映震效果

乔子云, 陈建国   

  1. 河北省地震局,河北石家庄 050021
  • 收稿日期:2000-11-27 修回日期:2001-01-03 出版日期:2001-07-31 发布日期:2022-06-02
  • 作者简介:乔子云(1965-),女,河北大名人,工程师,主要从事应变分析及地震预报研究。
  • 基金资助:
    国家科技攻关项目(96-913-09-01-01-03)部分成果

The earthquake-reflecting effect of NaKai fitting and tidal analysis of earth strain tide data

QIAO Zi-yun, CHEN Jian-guo   

  1. Seismological Bureau of Hebei Province, Shijiazhuang 050021, China
  • Received:2000-11-27 Revised:2001-01-03 Online:2001-07-31 Published:2022-06-02

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摘要： 采用NaKai拟合检验和潮汐变化分析方法,对应变固体潮的整点值数据进行处理,得到NaKai拟合振幅因子和应变M2 波潮汐因子变化曲线,并对这些变化曲线进行判断分析,统计异常的起止时间、幅度、特征及映震效果,计算出R值,通过查表得到R0值。从统计结果可以看出,应变(M2 波)潮汐因子变化曲线的异常特征较明显,每次异常都是在正常变化背景情况下出现的,异常有一个过程,异常信度较高,对应地震效果较好, R值评分较高;而NaKai拟合法得到的振幅因子曲线,其异常变化为突跳型,异常时间短。从计算结果来看, NaKai拟合检验和潮汐变化分析(M2 波)二种方法的R值均大于其R0值。

关键词: 应变, 固体潮, 映震效果

Abstract: The earth strain tide data are processed by using the NaKai fitting and tide analysis method. Through analyzing the curve of amplitude factor and M2 wave's factor, some a nomalies are found. We studied the starting and ending time, amplitude, and characteristics of these anomalies. Based on the statistics, the R-value is calculated. Compared R with Ro in the given chart the earthquake-reflecting effect for each method is assessed. From the statistical results we can see that the feature of strain tide factor (M2 wave) anomalies is relatively clear. Since it has a normal background and a developing process, its R-value and confidence level is higher, and the effect is better. But the amplitude factor curv e we got by using the NaKai fitting is not ideal. The anomaly's variation is abrupt jump type, and the lasting time of anomaly is short. The calculation shows that the R-value for the both methods is higher than the corresponding Ro, and the test is past.

Key words: Strain, earth tide, Earthquake-ref lecting

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