2017年9月4日河北临城M3.7地震处理分析  

Seismic Data Processing and Analysis of Hebei Lincheng M3.7 Earthquake on Sep.4,2017

作　　者：杨锐[1] 赵英萍[1] 常亮[1] 王宁[1] 李雪英[1] YANG Rui;ZHAO Ying-ping;CHANG Liang;WANG Ning;LI Xue-ying(Hebei Earthquake Agency,Heibei Shijiazhuang 050021,China)

机构地区：[1]河北省地震局,河北石家庄050021

出　　处：《防灾减灾学报》2020年第3期53-60,91,共9页Journal of Disaster Prevention And Reduction

摘　　要：2017年9月4日3时5分,在河北邢台市临城县发生3.7级地震,是邢台老震区发生的一次有感余震。从该震的地震序列、震源机制、震源深度、强震动数据处理、地震烈度等方面进行分析,结果表明:地震序列是前震-主余震型,应力降处于稳定低值状态,错动方式以走滑为主,最佳震源深度为7.2km,强震动数据获得最大地震加速度峰值为12.4cm/s^2,反应谱高频成分比较丰富,傅氏谱值随震中距加大衰减趋势有所减缓,多峰值占多数,计算得出的仪器烈度最大为2.7度,河北省地震局启动了Ⅳ级地震应急响应。对该次地震的处理分析体现了数字地震台网建设成效,对地震数据服务产品产出具有促进意义。At 3:05 on September 4,2017,a magnitude 3.7 earthquake occurred in Lincheng County,Xingtai City,Hebei Province.It was a felt aftershock in the old earthquake area of Xingtai.The earthquake sequence,focal mechanism,focal depth,strong earthquake data processing,earthquake intensity and other aspects of the earthquake are analyzed.The results show that the earthquake sequence is foreshock-main aftershock type;the stress drop is in a stable low value state;the dislocation mode is mainly strike slip;the optimal focal depth is 7.2km;the maximum earthquake acceleration peak value obtained from strong earthquake data is 12.4cm/s2;the high frequency components of the response spectrum are relatively rich;the Fourier spectrum value slows down with the increase of epicentral distance;the multi-peak value accounts for the majority;the calculated instrument intensity is 2.7 degree maximum,and Hebei Earthquake Agency has started the earthquake emergency response of magnitude IV.The processing and analysis of the earthquake reflected the construction effect of the digital seismic network and was of great significance to the output of seismic data service products.

关 键 词：临城地震 震源机制 强震动记录 处理分析 

分 类 号：P315.63[天文地球—地震学]