地震工程学报2017，Vol.39Issue(5)：919-924,6.DOI:10.3969/j.issn.1000-0844.2017.05.919
2015年阿拉善左旗Ms5.8地震序列特征及发震破裂面讨论
Discussion of the Earthquake Sequence and Earthquake Rupture Surface of Alxa Zuoqi Ms5.8 in 2015
摘要
Abstract
This paper studies the Ms5.8 earthquake that occurred in Alxa Zuoqi 2015.Based on the background seismicity and statistical analysis of the sequence,the HypoDD method was used to reposition the earthquake sequence.We examined the aftershocks distribution characteristics in space,and determined the Ms5.8 earthquake fracture surface combined with epicentral intensity、focal mechanism solutions,and the results of the re-positioning.The results show the Alxa Zuoqi MS5.8 earthquake is the main aftershock,after relocation,the epicenter is 39.78°N(±0.72 km)、106.34°E(-±-0.76 km),focal depth is 13.2 km(-±-1.15 km).The distribution direction of the sequence dominance is near NS and NEE,and extends 18 km and 16 km respectively.The focaldepth of the profiles display the overall east-dipping sequence;the focal depth gradually deepened from west to east.The regional stress field background characteristics、historical earthquake rupture characteristics、the main shock mechanism solutions,and serial repositioning information considered judgment,the fracture surface of Alxa Zuoqi Ms5.8 earthquake should be near NS-direction surface.关键词
阿拉善左旗5.8地震/HypoDD重新定位/发震破裂面/地震序列特征Key words
Alxa Zuoqi 5.8 earthquake/hypoDD repositioning/earthquake rupture surface/characteristic of earthquake sequence分类
天文与地球科学引用本文复制引用
魏建民,韩晓明,张帆,陈立峰,李娟,杨红樱..2015年阿拉善左旗Ms5.8地震序列特征及发震破裂面讨论[J].地震工程学报,2017,39(5):919-924,6.基金项目
内蒙古自治区2016年科技重大专项(2016ZF01) （2016ZF01）
“重点地区地震预测预警技术研究开发与推广示范” （）
