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本文计算了1980年1月——1987年4月唐山老震区余震序列的地震活动标度值。通过数据处理,分折讨论了在此期间所发生的4次强余震前,地震活动标度的异常特征。
This paper calculates the seismic activity scale values of the aftershocks of the Tangshan old earthquake zone from January 1980 to April 1987. Through the data processing and the fractal analysis, the anomalous characteristics of the seismic activity scale before the 4 strong aftershocks occurred during this period are discussed.