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本文从背景性地震活动、地震空区、震前平静、前震等地震活动的基本特征出发,分析了邢台地震的震前特征。结果表明,邢台地震是发生在华北地震区地震活动增强的背景中,震前几十年存在着中强地震空区,地震活动的纬向分布说明中小地震也可能存在地震活动空区。邢台地震有着丰富的前震活动,而震前区域地震活动的平静却不甚明显。在分析基本特征的基础上,用粗糙模式探讨了地震过程的物理机制。
Based on the basic features of the seismogenic activities such as the background seismicity, the seismic zone, the calm before the earthquake and the foreshocks, the paper analyzes the pre-earthquake features of the Xingtai earthquake. The results show that the Xingtai earthquake occurred in the background of enhanced seismic activity in the North China earthquake area. Before the earthquake, there was a moderately strong earthquake area. The zonal distribution of seismic activity indicates that there may be a vacant seismic area for medium and small earthquakes. The Xingtai earthquake has abundant foreshock activities, but the seismity of the pre-quake area is not obvious. Based on the analysis of the basic features, the physical mechanism of the earthquake process is discussed with the rough model.