摘要
使用双差地震定位法,重新确定了1999年9月24日发生于福州盆地,最大震级为ML3·8的震群序列的148次地震的震源位置,并结合福州市活断层探测的最新成果,探讨了该震群活动与福州盆地深部构造的关系。结果表明,此次震群的震源破裂过程可能主要受北西向断裂的控制,整个震群位于北西向断裂、南北向断裂与北东向断裂相互交汇的地区。
Using the double-difference earthquake location algorithm, we relocated the hypocenters of 148 earthquakes on the Sep. 24, 1999 Fuzhou earthquake swarm, which the maximum magnitude is ML3.8, occurred in Fuzhou basin. It was also determined of the preponderant distribution direction of the hypocenters. Combing with the newest results of the project ＂Active fault detecting in Fuzhou basin＂, we discuss the relationship between the earthquake swarm activity and the deep seismic structure in Fuzhou basin. The results show that the fracture process of the earthquake swarm was mainly controlled by NW directional rupture zone and the entire swarm was located in the cross region of NW, NS arid NE directional fracture zones.
出处
《地震地磁观测与研究》
2006年第4期23-28,共6页
Seismological and Geomagnetic Observation and Research
关键词
福州盆地
震群活动
地震精确定位
活断层构造
Fuzhou basin, earthquake swarm activity, seismic accurate location,active faultstructure
