内蒙古自治区中西部Lg波衰减及场地响应特征研究  

Study on Lg Wave Attenuation and Site Response Characteristics in Central and Western of Inner Mongolia,China

作　　者：贾昕晔 白少奇 贾彦杰 刘芳[2] 娜热 JIA Xin-ye;BAI Shao-qi;JIA Yan-jie;LIU Fang;NA Re(Xilinhot Earthquake Monitoring Center Station,Xilinhot 027000,China;Earthquake Agency of Inner Mongolia Autonomous Region,Hohhot 010010,China)

机构地区：[1]内蒙古自治区锡林浩特地震监测中心站,内蒙古锡林浩特027000 [2]内蒙古自治区地震局,内蒙古呼和浩特010010

出　　处：《地震》2024年第1期109-117,共9页Earthquake

基　　金：内蒙古自治区地震局局长基金项目(2021JP01);准能集团黑岱沟煤矿抛掷爆破振动控制技术研究与应用科技创新项目(ZNKJ-2020-5)。

摘　　要：基于Lg波谱比与台站场地响应联合反演的方法,选取2016-2020年内蒙古自治区及邻区地震台网记录到的ML≥2.8地震事件78次,开展内蒙古自治区中西部地震波衰减和场地响应分析研究。结果显示,三分向衰减参数分别为Q_(UD)(f)=372·f^(0.54),Q_(EW)(f)=287·f^(0.59),Q_(NS)(f)=382·f^(0.43)。分析34个台站场地响应可得,EKH、 BYT、 HYS台站在1~7 Hz频段内有明显放大效应,BHS、 XLT、 RLT台站在1~3 Hz频段有明显放大效应,可能与台站所处复杂的地质构造有关。Based on the joint inversion method of Lg spectral ratio and station site re-sponse,78 M.≥2.8 seismic events recorded by seismic network in Inner Mongolia and neighboring areas during 2016—2020 were selected to carry out seismic wave attenuation and site response analysis in central and western of Inner Mongolia.The results showed that the three-component decay parameters were respectively:Q_(UP)(f)=372·f^(0.54),Q_(EW)(f)=287·f^(0.59),Q_(NS)(f)=382·f^(0.43).By analyzing the response of 34 stations,we found that EKH,BYT and HYS stations had obvious amplification in 1~7 Hz research frequency band,while BHS,XLT and RLT stations had obvious amplification in 1~3 Hz low frequency band,which might be related to the complex geological structure where the stations were located.

关 键 词：内蒙古自治区中西部 LG波 衰减参数 场地响应 

分 类 号：P315.7[天文地球—地震学]