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本文将武当断块及邻区作为一个整体,分析了公元前159年以来中强地震的时、空、强活动图象特征。试图探讨中强地震活动以及主震发生前小震分布与武当断块构造及其区域孕震系统之间的某些内在联系,并对断块周缘的中强地震发展形势作了一些初步讨论。资料来源,主要根据《中国地震目录》(1977年)、《湖北省地震目录及地震台网观测报告》(1984年)、《河南省地震历史资料》(1980年)、《四川地震目录》(1975年)、《陕西安康地区地震目录》(1979年)、《陕西商洛地区地震目录》(1980年)和部分县
In this paper, the Wudang fault block and its adjacent area are taken as a whole to analyze the image features of the strong, moderate, and strong motion of moderate-strong earthquakes since 159 BC. This paper tries to discuss some intrinsical relations between the moderate strong earthquakes and the distribution of small earthquakes before the main shock and the structure of the Wudang block and its regional seismogenic system. Some preliminary discussions are also made on the development of moderate-strong earthquakes around the fault block. According to “China Earthquake Catalog” (1977), “Hubei Earthquake Catalog and Seismic Network Observation Report” (1984), “Henan Earthquake Historical Data” (1980), “Sichuan Earthquake Catalog” 1975), Shaanxi Ankang Earthquake Catalog (1979), Shaanxi Shangluo Earthquake Catalog (1980) and some counties