内蒙古中西部地区尾波Q值研究  

Study of code Q value in Midwest region of inner Mongolia

作　　者：刘芳[1] 苗春兰[2] 高艳玲[2] 

机构地区：[1]内蒙古自治区地震局,呼和浩特010051 [2]中国地震台网中心,北京100036

出　　处：《地震》2007年第2期72-80,共9页Earthquake

摘　　要：基于Sato单次散射模型，利用2001—2006年6月内蒙古数字地震台网记录到的发生在内蒙古中西部地区的114条ML≥2．7地震波形资料，从西到东分三个研究区对内蒙古中西部地区尾波Q值进行了研究，研究中首先计算各条记录尾波4～18Hz间15个频率点的尾波Q值，并对Q值与频率之间的依赖关系进行了拟合，拟合结果为：Ⅰ区Qc（f）=（69．98±20．92），f^（0.8989±0.0881）；Ⅱ区Qc（f）=（55．59±14．726）f^（0.9426Ⅱ0.1084）；Ⅲ区Qc（f）=（69．89Ⅱ18．54），f^（0.8352Ⅱ0.0913）。研究结果表明，尾波值表现出明显的分区性特征，研究区Ⅰ、Ⅲ表现为高Q值，研究区Ⅱ为低Q值，其结果可能与内蒙古中西部地区独特的构造分区特征有关。According to Sato single scattering model and using 114 earthquakes with ML≥ 2. 7 in Midwestern region of Inner Mongolia recorded by Inner Mongolia digital network from 2001 to June 2006, the coda quality factors of the three regions have been studied from west to east in Midwestern region of Inner Mongolia. Above all the code quality factors of every earthquake from 4 Hz to 18 Hz with 15 frequency points is calculated; the relation between Q value and frequency is fitted, the results show that region Ⅰ is Qc （f）= （69.98±20. 92）f^（0.8989±0.881）, region Ⅱ is Qc（f）= （55.59±14. 726）,f^（0.9426±0.1084）, region Ⅲ is Qc（f）= （69.89± 18. 54）f^（0.8352±0.0913）. The research shows that there are obvious zoning characteristics, region Ⅰ and Ⅲ is high Q value; region Ⅱ is low Q value, this result shows that there is definite relation between particular structural type zoning and code Q value.

关 键 词：尾波QC值 SATO模型 内蒙古 中西部地区 

分 类 号：P315.3[天文地球—地震学]