1999年岫岩地震序列尾波Qc的变化过程

地震 ›› 2004, Vol. 24 ›› Issue (4): 37-44.

1999年岫岩地震序列尾波Q_c的变化过程

王伟君, 刘杰

中国地震局分析预报中心, 北京 100036

出版日期:2004-10-31 发布日期:2021-11-29
作者简介:王伟君(1972-), 男, 广东兴宁人, 助理研究员, 1997年获硕士学位, 主要从事地震活动性等研究。
基金资助:
“十五”国家科技攻关项目(2004BA601B01-04-03); 地震科学联合基金项目(101126)

Temporal process of S-Coda Q_c of Xiuyan earthquake sequence in 1999

WANG Wei-jun, LIU Jie

Center for Analysis and Prediction, CEA, Beijing 100036, China

Online:2004-10-31 Published:2021-11-29

摘要/Abstract

摘要： 采用Sato单次散射模型, 利用近场台站岫岩台和营口台波形资料, 计算了1999年岫岩地震序列S尾波品质因子Q_c, 得到了3个分量10个频率点上Q_c随时间进程的变化。将序列分为3个时段: 前震时段、强余震活动时段、序列结束时段, 分别计算出每个时段内Q_c与频率的关系Q_c(f), 最后计算了整个序列的Q_c(f)。结果表明, Q_c在大震前后有较明显的变化, 基本趋势是震前Q_c增高, 震后降低。另外, 在不同的台站和不同的分量上Q_c变化有不同的反映灵敏度。比较该方法与Aki单次散射模型方法在计算结果上的差别, 认为Sato方法在本文的数据处理上更为合理。

关键词: 尾波品质因子Q_c, 岫岩地震序列, Sato单次散射模型, Aki单次散射模型

Abstract: Using the Sato's single isotropic scattering model, the authors calculated the S-coda attenuation factor Q_c values of 1999 Xiuyan M_L5.9 earthquake sequence at Xiuyan station and Yingkou station. And the temporal changes of Q_c in three components and 10 center frequencies are obtained for the two stations. Dividing the sequence into three time periods by the occurrence of two main quakes, the Q_c and frequency relation for the three time periods and total time sequence were calculated. The results show that Q_c increases in trend before the strong earthquake and decreases after the strong earthquake. The changes of Q_c vary at different stations and in different components. Compared it with Aki's single backscattering model, the authors believe that Sato's model is more reasonable for our data processing.

Key words: S-Coda attenuation factor Q_c, Xiuyan earthquake sequence, Sato single isotropic scattering model, Aki single backscattering model

中图分类号:

P315.3

王伟君, 刘杰. 1999年岫岩地震序列尾波Q_c的变化过程[J]. 地震, 2004, 24(4): 37-44.

WANG Wei-jun, LIU Jie. Temporal process of S-Coda Q_c of Xiuyan earthquake sequence in 1999[J]. EARTHQUAKE, 2004, 24(4): 37-44.

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