1994年9月16日台湾海峡南部7．3级地震的构造环境和震前地震活动图象

从构造单元、活动断裂、地球物理场、海底地形等方面分析了１９９４年９月１６日台湾海峡７．３级地震发生的构造环境。研究认为，地震发生在陆壳向过渡壳变化的位置上。历史上地震活动沿深部构造变异带分布，该区地质构造、震源深度、地震类型、地震波特性等都有别于海峡中、北部，具有南海系的特征。震前地震活动空间图象揭示了地震是南海系北缘断裂活动的结果

THE STRUCTURAL ENVIRONMENT AND THE SEISMICITY PATTERN OF SOUTH TAIWAN STRAIT M 7.3 EARTHQUAKE ON SEPT.16,1994

A strong earthquake (M 7.3) occurred in south Taiwan Strait on Sept.16,1994. In this paper,the its structure environment is analysed based on the tectonic unit, active fault, geophysical field, submarine morphology etc. The studies considered that the macroseism is situated at change location from continental crust to transitional crust. The seismicity in history is distributed along modification belt of deep seated structure. The geological structure,hypocentral depth, type of earthquake, the characters of seismic wave in this region are different from middle and northern Taiwan strait. It has characteristics of the South China Sea system. The spatial pattern of seismicity before the earthquake revealed that the macroseism was result of fault activity along the north margin of the South China Sea system .