论文部分内容阅读
1969年渤海7.4级地震余震基本参数原系山东、河北、北京和辽宁台网分别测定,精度很低,差别甚大。本文收集渤海周围区域台网纪录图纸集中分析震相,重新校订了余震基本参数。震源位置是用渤海地区地震资料计算的虚波速度值(V_虚=8.6公里/秒)测定;震级一般取多台平均震级;发震时刻用和达线确定。校订结果的可靠性大大提高。中文给出经过校订的渤海7.4级地震序列M_ι≥4.0级地震简目。
The basic parameters of the 1969 Bohai 7.4 earthquake aftershock were originally determined by Shandong, Hebei, Beijing and Liaoning Province, respectively. The accuracy was very low and the difference was very great. In this paper, we collect the records of the stations around the Bohai Sea to focus on the seismic facies and re-calibrate the basic parameters of aftershocks. The location of the focal point is determined by the value of the virtual wave calculated by the seismic data of the Bohai Sea (V_V x = 8.6 km / s); the average magnitude of the earthquakes is generally taken as multiple earthquakes; The reliability of the results is greatly improved. In Chinese, the abbreviated M_ι≥4.0 earthquakes of the corrected 7.4 Bohai Sea earthquake sequence are given.