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  2019,Vol.14no.1 ,page:108-117

Research on the Repositioning and Seismic Source Characters of the Changdao Coastal Earthquake Sequences, Shandong Province
Abstract:      Based on the data collected by the Shandong Digital seismic Network and the speed-structure model, we use the accurate double-difference location method to relocate two sequences starting from the February 14, 2017, the result show that the distribution of the aftershocks of the main sequence is along the class-I fault in earthquake swarm, In this paper also applied the CAP method to analyze inversely the focal mechanism solutions of several earthquake in the Changdao costal area. The focal mechanism solution of the main earthquake on March 3, 2017 includes the flowing parameters:nodal plane I (trend of 320°, dip angle 57ånd slide angle 12°);plane Ⅱ (trend of 223.4°, dip angle 80° and slide angle 146.4),The optimum fitting depth is 9.7km The solutions of nodal plane of these six large earthquakes agree with each other well.
Author NameAffiliation
Li Bo Shandong Earthquake Agency, Jinan 250014, China 
Cui Xin Shandong Earthquake Agency, Jinan 250014, China 
Zhang Zhihui Shandong Earthquake Agency, Jinan 250014, China 
Cai Yin Shandong Earthquake Agency, Jinan 250014, China 
Ji Aidong Shandong Earthquake Agency, Jinan 250014, China 
Keywords:    Changdao  Accurate double-difference location  CAP  Focal mechanism solution
Received on:  June 26, 2018
山东长岛海域震群重定位及震源特征研究
摘要:    基于山东数字化地震台站的震相资料和胶东半岛地区的速度结构模型,利用双差定位方法对2017年2月14日开始的山东长岛地区双震群进行重新定位,结果显示主震群余震序列分布沿一级断裂分布,震群位置比较集中。并利用CAP方法(Cut and Paste)对长岛海域2个震群中的几个较大地震进行震源机制解的反演分析,其中,2017年3月3日的主震震源机制解的节面I走向为320°,倾角57°,滑动角为12°;节面Ⅱ走向为223.4°,倾角80°,滑动角为146.4°;主震的最佳拟合深度在9.7km,6次较大地震的节面I走向也基本一致。
关  键  词:长岛  双差定位  CAP  震源机制解
基金项目:中国地震局测震台网青年骨干培养专项(CEA-JC/QNCZ-18162),山东省自然科学基金(ZR2017QD006),山东省地震局科研基金(JJ1804Y),中国地震局星火项目(XH19027),山东省自然科学基金(ZR2015DQ002)
作者简介:李铂,男,生于1983年。工程师。主要研究方向为地震监测与地震预报。E-mail:lbjjwgaj@163.com
引用本文格式:李铂,崔鑫,张志慧,蔡寅,季爱东.山东长岛海域震群重定位及震源特征研究[J].震灾防御技术英文版,2019,14(1):108-117  DOI:10.11899/zzfy20190111
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