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分析了中美洲及北京地区不同时段、不同尺度区域的地震活动特征 ,试图揭示地震空间活动的层次特征 .结果表明 ,不管所研究区域的范围和总体地震活动水平如何 ,总可以把它分为几个地震活动水平分别为高、中、低的小区域 ;在把一个区域粗略划分成 4个小区域的情况下 ,地震活动性最高与最低小区域的地震数目比值约为 4～ 5 ;对于更小的区域 ,地震活动也都具有这种规律 ,表现出很好的层次性 ,并且这种层次性不依赖于时间和震级 .地质构造的空间层次性是产生地震空间分布层次性的可能原因
The characteristics of seismicity in different time scales and different scales in Central America and Beijing are analyzed in order to reveal the hierarchical features of the spatial activity of the earthquake.The results show that regardless of the scope of the study area and the overall level of seismic activity, In the case of roughly dividing a region into four small regions, the ratio of the number of earthquakes with the highest and the lowest earthquakes is about 4 ~ 5. For more The small area and the seismic activity also have this kind of law, showing a good level of hierarchy, and this level does not depend on time and magnitude. The spatial hierarchy of geological structure is the possible reason for producing the spatial distribution of the seismic space