【摘要】 利用天津地震台网2002～2007年记录到的天津及周边地区,ML≥1.5地震,在天津及周边地区,按照活动空间分布特征圈定4个区域,采用单事件多台观测资料,对所选区域里的地震事件进行平均波速比值的计算,得到天津地区波速比变化与地震的对应关系。更多还原

【Abstract】 In the text, earthquakes ML≥1.5 recorded by Tianjin seismic network from 2002 to 2007 are selected. Four areas are selected in Tianjin and surrounding area according to activity space distribution. We have calculated the average ratio in the selected area by use of the phase data of a single event recorded by the network and gotten the correlation between velocity ratio and earthquakes in Tianjin area.更多还原