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  单连君,张新东,王晓山.2016年1月9日河北怀来ML3.4震群发震构造分析[J].震灾防御技术,2017,12(3):557-564, DOI:10.11899/zzfy20170312.

2016年1月9日河北怀来ML3.4震群发震构造分析
摘要:    本文采用模板识别匹配滤波方法检测2016年1月9日河北怀来ML3.4震群序列目录中遗漏的地震事件,并加入波形互相关信息对震相到时进行校正,采用盖革法进行精确定位。重新定位后震群震中呈NEE向分布,与怀涿次级盆地北缘断裂走向一致,并主要集中在该断裂的小水峪-黄土窑段。震群中最大地震ML3.4的P波初动解的一个节面走向与精定位后震中展布和断裂的走向基本一致,可推测怀涿次级盆地北缘断裂可能为怀来ML3.4震群的发震构造。震中集中分布的怀涿次级盆地北缘断裂的小水峪-黄土窑段属5个分段中滑动速率最大的段落,分析认为该震群可能是由断层慢滑动引起的。
作者单位
单连君 河北省地震局, 石家庄 050021 
张新东 河北省地震局, 石家庄 050021 
王晓山 河北省地震局, 石家庄 050021 
关  键  词:怀来震群  遗漏地震检测  精确定位  发震构造
DOI:10.11899/zzfy20170312
基金项目:河北省地震局地震科技星火计划重点项目“晋冀蒙交界区临时测震台网建设运行及强震背景跟踪研究(DZ20150428102)”与“晋冀蒙交界地区典型盆地孕震动力学模型构建(DZ20160621076)”
收稿日期:2016-09-17
作者简介:单连君,男,生于1983年。工程师,硕士。研究方向:地震综合预报。E-mail:584434003@qq.com
通讯作者:王晓山,男,生于1980年。副研究员,博士。研究方向:数字地震学。E-mail:wxs@eq-he.ac.cn
Analysis of Seismogenic Structure of the Huailai ML3.4 Earthquake Swarm on January 9, 2016 in Hebei Province
Abstract:      The template recognition and matched filter method is used to detect missing earthquake events in the Huailai ML3.4 earthquake swarm on January 9, 2016 in Hebei Province, and the waveform correlation information is added to correct the earthquake phase arrival time. After the precise relocation by the Geiger method, direction of the distribution of swarm epicenters is in the NEE direction, which is consistent with the strike of the north margin fault of the Huaizhuo sub-basin. The relocated events are mainly concentrated in the Xiaoshuiyu-Huangtuyao segment of the north margin fault of the Huaizhuo sub-basin. The strike of node plane of P-wave first motion solution of ML3.4 is same as the distribution of precise relocation and the strike of the north margin fault of the Huaizhuo sub-basin. It is inferred that the north margin fault of the Huaizhuo subbasin may be the seismogenic structure of the Huailai ML3.4 earthquake swarm. The segment of the Xiaoshuiyu-Huangtuyao has the biggest slip rate among the five segments of the north margin fault of the Huaizhuo subbasin, so we conclude that the earthquake swarm may be caused by the slow slip model.
Keywords:  Huailai earthquake swarm  Missing earthquake detection  Precise relocation of earthquake  Seismogenic structure
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