摘要
采用Atkinson方法,基于遗传算法,利用呼和浩特数字地震台网7个子台记录的9次质量较高的地震事件资料,计算了内蒙古中西部地区的品质因子Q值和非弹性衰减系数c(f)。在所研究的频率范围内,前者和频率f有很好的线形关系:Q(f)=116.8f1.000;后者与频率f的变化关系不明显。在此基础上采用Moya方法反演了7个地震台的场地响应和地震的震源参数,并对它们之间的相互关系进行了讨论。结果显示在所研究的频率域内7个基岩台站的场地均不同程度的存在放大作用,其次震源参数间具有较好的线性关系。本文还详细介绍了Atkinson方法和Moya方法的原理和计算步骤。
In this paper,the quality factor （Q） and the non-elasticity attenuation cofficient c（f） in Midwest area of Inner Mongolia are calculated using data of nine events recorded by 7 stations of hohhot digital seismic net based on genetic algorithm and Atkinson method. In the scope of studying frequency ,the correlation of the non-elastlcity cofficient c（f） and frequency f is not obvious,but the quality factor Q and frequency f have good linearity connection ： Q（ f）= 116. 8f^1.000 Meanwhile,the source parameters are inverted by using Moya toothed, and the relationships between the source parameters are discussed. The result shows that the correlation of the source parameters has good linerity connection . The site effects for seven stations are also obtained by GA and the Moya methods from nine earthquakes,the result shows there is the amplification at the rock sites in the whole frequency band. The principium and approach of the Atkinson and Moya methods are introduced in this paper.
出处
《西北地震学报》
CSCD
北大核心
2005年第2期109-114,共6页
Northwestern Seismological Journal
基金
中国地震局地震图像与数字化资料应用实验资助.
关键词
内蒙古中西部
遗传算法
场地响应
震源参数
Midwest area of Inner Mongolia
Genetic algorithm
Site effects
Source parameters
