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根据自组织临界现象理论,研究7海城、唐山等7个大地震前、后中小地震的活动特征,计算了不同孕震时期地震活动的功率谱特征.初步结果表明描述地震活动的谱幂律指数p值在大震发生前有明显的增高倾向.主震前一年及主震当年,p值一般落在闪变噪声的谱域,其他时间一般很小.最后讨论了地震孕育的物理过程及孕震系统的稳定性.
According to the theory of self-organized criticality, the characteristics of seismic activity before and after the seven major earthquakes in Haicheng and Tangshan were studied, and the power spectrum characteristics of different seismogenic periods were calculated. The preliminary results show that the spectral power law The index p has a tendency to increase obviously before the occurrence of a major earthquake.The p value usually falls in the spectral range of flicker noise in the year before the main shock and the main shock in that year, and the other times are generally small.Finally, the physical process of earthquake gestation And the stability of the seismogenic system.