弱震条带对2001年首都圈地区中等地震活动的指示意义

Small earthquake band suggested the moderate earthquake occurrence in Capital Circle Region in 2001

比较系统分析总结了2001年首都圈及邻近地区中等地震发生前小震活动特征及所形成的弱震条带,6次中等地震前均出现了弱震活动有序分布现象,由2～3级地震组成的弱震条带后发生中等地震的可能性更大,但条带长度和持续时间与地震震级关系不甚明显,这些规律特点可为日常短临跟踪及分析预报提供借鉴资料。

In this paper, the small earthquake activity and its bands occurred in the Capital Circle Region in 2001 were studied. There was the ordered distribution of weak seismicity before 6 moderate earthquakes. After the band of the M\2. 0~3. 0 small earthquakes formed, the probability of occurrence of moderate earthquakes was bigger. But the band length and lasting time has not shown more relationship with the earthquake magnitude. All the features could provide some references to routine analysis and prediction.