向家坝、溪洛渡库区地震尾波Q_(c)值估计  

Estimation of Coda Wave Attenuation in Xiangjiaba and Xiluodu Reservoirs Region

作　　者：杨磊 雷红富 游家兴 杜兴忠 江晓涛 常廷改[3] YANG Lei;LEI Hongfu;YOU Jiaxing;DU Xingzhong;JIANG Xiaotao;CHANG Tinggai(Guiyang Engineering Co Ltd,Power China,16 Xingqian Road,Guiyang 550081,China;China Three Gorges Construction Engineering Corporation,288 East-Fucheng Road,Chengdu 610095,China;China Institute of Water Resources and Hydropower Research,20 West-Chegongzhuang Road,Beijing 100048,China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵阳市550081 [2]中国三峡建工(集团)有限公司,成都市610095 [3]中国水利水电科学研究院,北京市100048

出　　处：《大地测量与地球动力学》2023年第4期403-408,共6页Journal of Geodesy and Geodynamics

基　　金：中国电力建设股份有限公司科技项目(DJ-ZDXM-2020-55);中国电建集团贵阳勘测设计研究院有限公司科研项目(ZL2020-25,ZL2022-12)。

摘　　要：基于向家坝、溪洛渡水库地震监测台网35个台站记录到的99次M_(L)2.1~4.1地震观测资料,利用Aki单次散射模型研究库区地震尾波衰减特征。结果表明,库区Q_(c)值与频率有较强的依赖关系:Q(f)=(120.8±3.6)f^((0.7712±0.0103)),为后续震源参数计算和定标关系研究提供了良好基础。相较于Koyna、Aswan和新丰江水库,向家坝、溪洛渡水库具有高Q_(0)值和低n值特征,与水库库区地震活动性相符。We study the attenuation of coda waves and its frequency and lapse-time dependence based on Aki Model in Xiangjiaba and Xiluodu reservoirs region.We analyze coda waves from 99 earthquakes recorded in this region.The magnitudes of the analyzed events range from 2.1 to 4.1.The Q_(c)values show strong frequency dependence,Q(f)=(120.8±3.6)f^((0.7712±0.0103)).Our results provide a good basis for the calculation of seismic source parameters.Compared with Koyna reservoir,Aswan reservoir and Xinfengjiang reservoir,Xiangjiaba and Xiluodu reservoirs are characterized by high Q_(0)value and low n value,which are consistent with the seismic activity of reservoir areas.

关 键 词：向家坝水库 溪洛渡水库 水库地震 尾波衰减 

分 类 号：P315[天文地球—地震学] P313[天文地球—固体地球物理学]