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熊岳—盖县地区位于海城地震区的南面,其地震活动具有频度高但震级不大的特点,地震空间分布受局部构造的控制和影响,是一个地震活动块体。本文分析了1940年以来本区地震活动与海城地震、华北地震活动的关系,发现熊岳—盖县地区的地震活动灵敏地反映了海城地区及华北地区应力场的变化,因而它是华北区域应力场变化的“窗口”,它所显示的信息对于研究华北区域应力场变化和预报华北地区强震活动都有一定的意义。
Xiong Yue - The Gaixian area is located south of the Haicheng earthquake area. Its seismicity has the characteristics of high frequency but small magnitude. The seismic spatial distribution is controlled and influenced by the local structure and is a seismic activity block. This paper analyzes the relationship between the seismic activity in this area and the Haicheng earthquake and the North China earthquake since 1940 and finds that the seismic activity in the Xiong Yue-Gaixian area reflects the change of the stress field in the Haicheng area and North China area sensitively. The “window” of regional stress field changes, the information it displays is of great significance for the study of the change of stress field in North China and the prediction of strong earthquakes in North China.