内蒙古自治区中西部Lg波衰减及场地响应特征研究

doi:10.12196/j.issn.1000-3274.2024.01.008

地震 ›› 2024, Vol. 44 ›› Issue (1): 109-117.doi: 10.12196/j.issn.1000-3274.2024.01.008

内蒙古自治区中西部Lg波衰减及场地响应特征研究

贾昕晔¹, 白少奇¹, 贾彦杰¹, 刘芳², 娜热²

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

收稿日期:2022-01-13 修回日期:2023-12-04 出版日期:2024-01-31 发布日期:2024-03-21
通讯作者: 刘芳, 研究员。 E-mail: lfnm88@163.com
作者简介:贾昕晔(1970-), 女, 内蒙古锡林郭勒太仆寺旗人, 高级工程师, 主要从事地震监测预报研究。
基金资助:
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)

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

JIA Xin-ye¹, BAI Shao-qi¹, JIA Yan-jie¹, LIU Fang², NA Re²

1. Xilinhot Earthquake Monitoring Center Station, Xilinhot 027000, China;
2. Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China

Received:2022-01-13 Revised:2023-12-04 Online:2024-01-31 Published:2024-03-21

摘要/Abstract

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省地震台网记录到的M_L≥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: QUD(f)=372·f0.54, QEW(f)=287·f0.59, QNS(f)=382·f0.43。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。

关键词: 内蒙古自治区中西部, Lg波, 衰减参数, 场地响应

Abstract: Based on the joint inversion method of Lg spectral ratio and station site response, 78 M_L≥2.8 seismic events recorded by seismic network in Inner Mongolia and neighboring provinces 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: QUD(f)=372·f0.54, QEW(f)=287·f0.59, QNS(f)=382·f0.43. 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.

Key words: Western region of Inner Mongolia, Lg wave, Attenuation parameter, Site response

中图分类号:

P315.7

贾昕晔, 白少奇, 贾彦杰, 刘芳, 娜热. 内蒙古自治区中西部Lg波衰减及场地响应特征研究[J]. 地震, 2024, 44(1): 109-117.

JIA Xin-ye, BAI Shao-qi, JIA Yan-jie, LIU Fang, NA Re. Study on Lg Wave Attenuation and Site Response Characteristics in Central and Western of Inner Mongolia, China[J]. EARTHQUAKE, 2024, 44(1): 109-117.

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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

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