地震学报2011，Vol.33Issue(2)：134-142,9.DOI:10.3969/j.issn.0253-3782.2011.02.002
新疆天山中东段地区地震波衰减、场地响应及震源参数研究
Ground motion attenuation, site response and source parameters of earthquakes in middle and eastern range of Tianshan mountain, Xinjiang of China
摘要
Abstract
Based on digital seismograms recorded at 17 stations of XinJiang, the inelastic attenuation coefficient of seismic waves is calculated using genetic algorithm and the method proposed by Atkinson and Mereu. Then, the station site response and source parameters are investigated with the approach of Moya and Jorge. The frequency-dependent S wave Q in Xinjiang region is estimated as Q (f) =460.7f0.515. Site responses of 17 stations show different amplifications.In semi-logrithmic coordinate magnitudes are positively correlated with seismic moments and source radii, and negatively correlated with corner frequencies of source spectrum. Stress drops do not obviously depend on the magnitudes. This inplies that stress drop of earthquakes in a region may be a meaningful parameter for earthquake prediction.关键词
新疆天山中东段地区/地震动衰减/场地响应/几何衰减函数/Q值Key words
middle Tianshan range/ attenuation of S wave/ station site response/ geometric spreading function/ Q value分类
天文与地球科学引用本文复制引用
唐兰兰,李志海..新疆天山中东段地区地震波衰减、场地响应及震源参数研究[J].地震学报,2011,33(2):134-142,9.基金项目
中国地震局行业专项基金(20070826)、2010年度震情跟踪合同制定向工作任务(2010020107)和新疆地震科学基金《数字地震波谱分析的综合应用研究》(200808)联合资助. （20070826）
