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在对青藏高原东北边缘和华北构造区西缘过渡区主要断裂活动特征 ,及其相互关系详细研究的基础上 ,通过大量探槽资料 ,剖析了研究区一万年以来古地震活动在时、空、强分布上的特征 .研究区区域古地震复发模式表现为两种密集程度不同的丛集形式 :一种是历时30 0年左右 ;另一种是历时 1 0 0 0年左右 .古地震复发行为表现为显著的阶段性和不均匀性
Based on the detailed study on the characteristics of the main faults in the transitional zone between the northeastern margin of the Qinghai-Tibet Plateau and the western margin of the North China tectonic region and their correlations, the paper analyzes the data of a large number of probes since the paleo- , Strong distribution characteristics of the study area area of ancient earthquakes recurrence pattern showed two types of intensive clusters of different concentrations: one is lasted for 30 years or so; the other is lasted about 1000. The recurrence of ancient earthquakes Manifested as significant stage and inhomogeneity