摘要
基于单次散射(Aki)模型,利用2000年至今浙江及安徽台网记录的37次ML3.0以上地震的数字地震波资料,计算了浙江及邻近省区平均尾波Q值,并拟合了Q值对频率的依赖关系数据。结果为:Q(f)=212±33.5f0.62±0.11,与国内其它区域相比,本区域为Q值高值、对频率低依赖性区域。认为本研究区内构造活动弱,地震活动水平低。本文就Q值对频率、尾波窗长等的依赖性特征及影响Q值计算的噪声水平、滤波器、数据采样等因素进行了深入分析。
Based on the single scatter model（ Aki ）, using 37 earthquake digital wave data above ML3.0 from 2000 to now recorded by Zhejiang and Anhui earthquake nets, the average Q value of coda in relative region is calculated, and relationship between Q value and frequency is polyfited. The result isQ（f）=212±33.5f^0.62±0.11. Contrasting the result with that of other domestic region, the coda scatter feature is that the Q value is higher but dependence on frequency is lower, so it is considered that tectonic activity and seismisity are low in this region. Also the effects from those factors including coda windows length, noise level, filter type and so on, which are thought to change Q value in data processing, are analysed deeply in this paper.
出处
《西北地震学报》
CSCD
北大核心
2006年第2期108-113,共6页
Northwestern Seismological Journal
基金
浙江省科技计划项目(2004c33079)
中国地震局地震图像与数字化地震观测资料应用实验资助
关键词
单次散射
尾波Q值
依赖性
浙江
Single scatter
Q value of coda
Dependent relation
Zhejiang
