【摘要】 为研究中国地震分布的时空特征，采用时空联合的单键群（ＳＬＣ）方法，计算了１９７０－１９９８年３月间该区域发生的４级和４级以上地震的时空ＳＬＣ构架．对时空ＳＬＣ构架所做的统计分析表明：①截止键长Ｄ在 ５０－８０ｋｍ范围内时，地震集团的个数 Ｔ（ｎ）与集团的大小 ｎ（所含地震个数）之间是自相似分布．在６５ ｋｍ附近，ｌｇＴ（ｎ）与 ｌｇｎ之间的线性相关性最好；②构架的累计键长符合Ｗｅｉｂｕｌｌ分布；③在删除前震和余震之后，构架的累计键数也服从Ｗｅｉｂｕｌｌ分布．更多还原

【Abstract】 According to the principle of minimal spanning tree, a procedure of Single-Link Ouster (SLC) method is provided and applied to a vast amount of earthquakes occurred in China from 1970 to March 1998. In the bine-space SLC frame, the number of clusters T(n) decreases as increasing of the number of events n in each cluster. It Shows power-law decay. The relative accumulative length of links in the frame has a Weibull distribution. After the pre-shocks and after shocks are removed from the catalogue, the relative cumulative frequency of links obeys the same law too.更多还原