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作者曾以地球自转速率与不同震级的地震频度年变化之间的规律和地震在地球纬度上的分布,讨论了地球自转不均匀性和地震的关系,初步肯定了前者对于后者的触发作用.最近作者从8级地震M—t图和地震发生时间间隔方面,似又找到了这两者之间的两个新证据.一、关于地震发生时间的间隔准备知识 对于等间距的序列来说,周期分析方法甚多、日趋完整,有方差分析、自相关分析、功率谱、周期图、极谱及最大熵谱等.对不等间距序列的周期分析,尚未找到一个较好的方法.通常将不等间距序列用埃尔米函数补插,或先用Vondrak法平滑、后用样条函数内插,将它化成等间距序列,再作周期分析.由于内插值是造出的,客观上并不存在,可能带有某种人为性,故所得到的个别周期有可能不够真实.作者设计了从某一类不等间距序列直接求周期的方法.存在一组不等间距的时间序列:
Based on the law between the Earth’s rotation rate and annual variation of earthquakes at different magnitudes and the distribution of earthquakes on the earth’s latitude, the authors discussed the relationship between the rotation inhomogeneity and earthquakes and tentatively confirmed the former’s triggering action on the latter Recently, the authors also found two new evidences for the M-t map of magnitude 8 earthquakes and the time interval between earthquakes: 1. Interval preparation for earthquake occurrence time For equidistant sequences There are many methods of periodic analysis, such as analysis of variance, autocorrelation analysis, power spectrum, periodic map, polarographic spectrum, maximum entropy spectrum, etc. There is not a better way to analyze the periodicity of unequal interval sequences. The unequal spacing sequences are interpolated with Hermite functions or first smoothed by the Vondrak method and then interpolated with spline functions to form them into equally spaced sequences for periodic analysis. Since the interpolated values are created objectively It does not exist and may have a certain kind of human nature, so the obtained individual cycles may not be real enough.The author designs a method to directly search the periodicity from some kind of unequal spacing sequence, there is a group of unequal spacing time Column: