河北涿鹿ML4.8地震前后单台波速比特征  

Temporal Variation of vP/vS at Single Seismic Station before and after Zhuolu M_(L)4.8 Earthquake in 2014

作　　者：王亚茹[1] 刘晓丹[1] 郭蕾[1] 王妍[1] 周依 王想[1] WANG Yaru;LIU Xiaodan;GUO Lei;WANG Yan;ZHOU Yi;WANG Xiang(Hebei Earthquake Agency,Shijiazhuang 050021,China)

机构地区：[1]河北省地震局,石家庄050021

出　　处：《华北地震科学》2021年第2期87-95,共9页North China Earthquake Sciences

基　　金：2019年河北省地震科技星火计划面上项目(DZ20190416005);2020年河北地震科技星火计划攻关项目(DZ20200325038);中国地震局地震科技星火计划(XH18008Y)。

摘　　要：2014年9月6日河北涿鹿ML4.8地震打破了晋冀蒙地区长达4年的地震平静。通过收集并整理2008—2019年河北台网的震相数据,挑选涿鹿地震周边数据连续性较好的10个台站,分别计算这10个台站的单台波速比并滑动平均,结合涿鹿地震对其时序特征进行讨论和分析,认为涿鹿地震前SHC台站波速比出现低值—持续—回升—发震这一典型异常形态,与涿鹿地震可能存在一定关系,推断延怀盆地可能是涿鹿地震的孕震区域。The Zhuolu ML4.8 earthquake On September 6,2014 broke the 4-year calm of earthquakes in the Jinjimeng area.In this paper,we collect seismic phases records from 2008 to 2019 and select 10 stations around Zhuolu ML4.8 earthquake to calculate the wave velocity ratio using Wadati method of single station and average the initial data using moving average model.The wave velocity ratio calculated by the single Shacheng station shows a typical abnormal morphology of beginning at a low data and back to higher value before Zhuolu earthquake,which shows that the Yanhuai Basin,in where Shacheng station located,may be the seismogenic body.

关 键 词：涿鹿 地震 波速比 单台 和达法 

分 类 号：P315.63[天文地球—地震学]