2013年吉林松原震群重定位及其发震构造  

Relocation of the 2013 Songyuan earthquake swarm in Jilin Province and its seismogenic structure

作　　者：盛书中[1] 万永革[1] 王晓山[2] 黄骥超[1] 徐志国[3] 李静[1] SHENG Shuzhong WAN Yongge WANG Xiaoshan HUANG Jichao XU Zhiguoa LI Jing(Institute of Disaster Prevention, Sanhe 065201, China Earthquake Administration of Hebei Province, Shijiazhuang 050021, China National,rVlarine Environmental Forecast Center, Beijing 100081, China)

机构地区：[1]防灾科技学院,河北三河065201 [2]河北省地震局,河北石家庄050021 [3]国家海洋环境预报中心,北京100081

出　　处：《地学前缘》2017年第2期212-219,共8页Earth Science Frontiers

基　　金：中国地震局教师基金项目(20140102);中央高校基本科研业务专项(创新项目团队资助计划)(ZY20110101);地震行业专项(201208009)

摘　　要：为探讨2013年松原震群的发震构造,本研究采用中国地震台网中心提供的2013年10月31日至2014年7月13日的观测数据,利用双差定位法对吉林松原震群序列进行了重定位,并使用不同速度模型考查重定位结果的稳定性。研究结果表明:由不同速度模型获得的震群序列空间分布形态较为一致,速度模型对震群序列的震源深度存在一定的影响。本次地震序列的优势分布为NW-SE向,呈条带状分布,长度约10km。震群深度分布为7~11km,厚度约4km的一个较小深度范围内。结合已有的震源机制解研究结果,我们推断此次震群序列的发震构造是震源区基底深部一条与长岭—大山子断裂近似正交的NW-SE向隐伏逆断层上。In order to investigate the seismogenic structure of the 2013 Songyuan earthquake swarm,the earthquake swarm was relocated with the double difference method,by using the observation data offered by the China Earthquake Networks Center;the time range of the data is from 31 October 2013 to 13 July 2014.Different velocity models were used to test the stability of the relocation result,and the study result shows that the spatial distribution pattern of the earthquake swarm is consistent with different velocity models,but the velocity model has some impact on the depth of hypocenter.The epicenter of the earthquake swarm shows a horizontal banded distribution,and the distribution is mainly along the NW-SE direction with the length of about 10km.The depth range of the earthquake swarm is from 7km to 11km,and the thickness of the seismogenic zone is about 4km.Combining the study results of the focal mechanism,we speculate that the seismogenic fault is a buried thrust fault in the direction of NW-SE,at the depth of the basement of the source region,and its strike is nearly perpendicular to the Changling-Dashanzi fault.

关 键 词：地震定位 双差定位法 发震构造 松原震群 

分 类 号：P315.6[天文地球—地震学]