摘要
首先分３个阶段分析永善－大关７．１级地震序列的地震活动图像，发现前、后阶段分别出现北西、北东向地震密集带，中间是过渡阶段；然后使用带内的１１次４级以上和１１７次小于４级地震的震源机制资料进行构造分析，得到该序列主要破裂特征是由北西向左旋断层和北东向右旋断层组合成的共轭破裂．
In this paper,to analysis its seismicity pattern,the Ms 7.1 Yongshan-Daguan earthquake sequence is first divided into three periods.It is discovered that the NW and NE seismic dense belts appeared in the first and last periods,and the middle period is a transitional one.The main rupture characteristics of the sequence is obtained by using the focal mechanisms of 11Ms>4. 0 and 117 Ms<4. 0 earthquake in the zone. It is a conjugate rupture constituted by the NW left lateral fault and NE right lateral fault.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第A02期170-176,共7页
Chinese Journal of Geophysics
基金
地震科学联合基金
关键词
地震序列
地震活动图像
震源机制
地震破裂
Earthquake sequence
Seimicity pattern
Focal mechanism
Conjugate earthquake rupture
Yongshan-Daguan.
