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本文求取了1904—1980年全球浅源地震释放能量时间序列的付氏谱、布莱克曼—图基谱和最大熵谱。由不同的取样方式和功率谱的计算方法,确定其地震能量释放较为可信的隐含周期约为9.1年、14.4年、45.4年和128年,且这些主要周期成份之间存在整数因子3和5。用互功率谱法求取了这些主周期成份的初相,从而确定了这些周期成份取最大值的时间,并与地震能量释放时间序列进行了对比,推测下一个全球浅源地震能量释放高潮期约在1990—1994年左右。
In this paper, the time-series Fourier, Blackman-graph and maximum entropy spectra of the time series of global shallow earthquakes released from 1904 to 1980 are obtained. According to different sampling methods and power spectrum calculation methods, the implicit periods with more credible seismic energy release are determined to be about 9.1 years, 14.4 years, 45.4 years and 128 years, and the integral factors 3 and 5. The initial phases of these main periodic components were obtained by the cross-power spectrum method, and the time of taking the maximum values of these periodic components was determined. Compared with the time series of seismic energy release, it was estimated that the next global shallow-source seismic energy release climax Around 1990-1994.