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现存几个全球性地震目录中的深震震级标度彼此间是不一致的,为了能在统一而又严谨的基础上探讨本世纪以来全球深震活动的时空图象,本文利用中国地震台网基式地震仪的观测资料,将阿部胜征的中、深震目录延续至1980年。在此基础上,讨论了全球深震活动的重复特性。从而认识到,b 值的计算明显地依赖于用来测定的地震数目,有迹象表明,地震的累积频度随震级的分布是非线性的。本文进而沿用每年发生的深震次数、能量释放量以及震级一频度分布关系中系数 b 值随时间的变化,希图统观深震活动的特征。据此认为,在本世纪初,深震活动性较高,而在近期内深震活动性偏低。
In the existing earthquakes, the scale of deep earthquakes in different earthquakes catalogs is inconsistent with each other. In order to explore the space-time images of deep-seated earthquakes in this century on a unified and rigorous basis, Seismograph observations, the Abe sign of the medium and deep earthquake catalog extended to 1980. On this basis, the repetitive characteristics of deep earthquakes in the world are discussed. Thus, it is recognized that the calculation of b-values is significantly dependent on the number of earthquakes used for the determination, and there are indications that the cumulative frequency of earthquakes is nonlinear with magnitude distribution. In this paper, we follow the characteristics of deep earthquakes that occur each year, such as the number of deep earthquakes, energy release and the frequency-dependent b-value variation with time. Based on this, we believe that at the turn of the century, there was a high degree of deep-seated activity and a low degree of deep-seated activity in the near future.