辽宁海城3.6级地震加速度记录特征分析  

Analysis of the Recorded Acceleration Characteristics of the M3.6 Magnitude Haicheng Earthquake in Liaoning Province

作　　者：李永振[1] 王晓睿[1] 郭攀 陈继伟[1] 查楠[1] LI Yongzhen;WANG Xiaorui;GUO Pan;CHEN Jiwei;ZHA Nan(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)

机构地区：[1]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2025年第2期44-49,共6页Journal of Disaster Prevention And Reduction

基　　金：辽宁省地震局揭榜挂帅项目(LNjbgs-202401)。

摘　　要：2024年3月4日辽宁省海城发生ML3.6地震,辽宁省强震动台网共获取了27组强震记录。通过对辽宁省强震动台站加速度记录峰值、频谱、V/H谱比值以及台站场地响应等分析,结果发现:近场台站场地放大效应明显,水平向最大峰值达到126.8 gal;加速度记录经校正后,峰值较原始加速度记录峰值平均减少了0%~39%不等;在相同震中距条件下,基岩台站V/H谱比值普遍大于土层台站;采用谱比法计算结果表明,近场台站的傅氏谱比值SH/SV大于1,台基放大效应明显。The ML3.6 earthquake occurred in Haicheng,Liaoning Province on March 4,2024.A total of 27 sets of strong earthquake records were obtained by the Liaoning Province strong seismic network.In this paper,the acceleration records,peak value,spectrum,data correction,V/H ratio and site response of the strong seismic stations in Liaoning Province are analyzed.The results show that the field amplification effect of the near field stations is obvious,and the maximum horizontal peak value reaches 126.8 gal.After the acceleration record is corrected,the peak value decreases by 0%~39%compared with the original peak value.With the same epicentre distance,the V/H ratio of bedrock stations is generally greater than that of soil stations.The Fourier spectrum ratio of the near field station is greater than 1,and the base has an amplification effect.

关 键 词：加速度记录 峰值 强震动台网 海城地震 V/H谱比法 

分 类 号：P315.9[天文地球—地震学]