摘要
江西省寻乌地区是一个中强地震的多发区,历史上曾发生过三次5—6级中强地震,1987年8月在寻乌县域附近又发生了一次Ms5.5级中强地震群.本文概述了震区的区域地震地质构造背景,并根据现场宏观考察资料对1987年8月中强地震群的发震构造部位、震源构造力学模型等问题作了初步论讨。初步结论是:这次中强地震群的发生是在区域NW290°—SE110°主压构造应力场作用下,震区新华夏断裂系统再度位错变形活动的结果。
The region of xunwu, Jiangxin Province is the area where many moderately strong earthquakes occur, among them,three moderately strong earthquakes of Ms≥5 occurred in the history. In Aug. 1987, a moderately strong earthquake swarms of Ms = 5.5 occurred in Xunwu town. This paper summarizes the background of the regional seismogeological structure and discusses some problems about the seismo-genetic structure mechanical model of focal structure of moderately strong earthquake swarms occurred in Aug. 1987 on the basis of the data in situ macroseismic survey. The preliminary conclusion shows that this event is the result of redislocation and deformation activity of neocathaysian rift system, which under the action of major pressure tectonic stress field of NW 290°-SW 110° in the region.
出处
《华南地震》
1989年第2期14-21,共8页
South China Journal of Seismology
