[1]魏红梅,陈丽娟,王同军.重庆地区背景噪声面波群速度层析成像[J].华南地震,2020,40(01):46-52.[doi:10.13512/j.hndz.2020.01.007]
　WEI Hongmei,CHEN Lijuan,WANG Tongjun.Surface Wave Group Velocity Tomography of Background Noise in Chongqing Area[J].South China journal of seismology,2020,40(01):46-52.[doi:10.13512/j.hndz.2020.01.007]
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重庆地区背景噪声面波群速度层析成像()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2020年01期
页码:
46-52
栏目:
地震科学研究
出版日期:
2020-03-31

文章信息/Info

Title:
Surface Wave Group Velocity Tomography of Background Noise in Chongqing Area
文章编号:
1001-8662（2020）01-0046-07
作者:
魏红梅; 陈丽娟; 王同军
重庆市地震局，重庆 401147
Author(s):
WEI Hongmei; CHEN Lijuan; WANG Tongjun
Chongqing Earthquake Agency，Chongqing 401147，China
关键词:
背景噪声; 互相关; 格林函数; 群速度频散; 面波层析成像; 重庆地区
Keywords:
Background noise; Cross-correlations; Green＇s function; Group velocity dispersion; Surface wave tomography; Chongqing region
分类号:
P315.7
DOI:
10.13512/j.hndz.2020.01.007
文献标志码:
A
摘要:
选取重庆、四川、湖北、湖南及贵州测震台网共25个固定台站2015年3～9月的连续地震背景噪声记录，利用互相关方法获得瑞利面波的格林函数，再用时频分析方法提取瑞利面波的群速度频散曲线，最后用面波层析成像方法反演得到重庆地区深度为5～20 km的S波速度图像。成像结果表明重庆地区浅部地壳S波速度结构存在横向不均匀性；S波速度异常与研究区内断裂构造分布有较好的相关性，基底埋深较浅的山脉地区为高值异常区。
Abstract:
This paper selected the continuous seismic background noise records from March to September 2015 recorded by 25 fixed stations in Chongqing, Sichuan, Hubei, Hunan, and Guizhou. The cross-correlation method was used to obtain the Green’s function of the Rayleigh surface wave, and the group velocity dispersion curve of the Rayleigh surface wave was extracted by time-frequency analysis method. Finally, the surface wave tomography method was used to invert the S-wave velocity images in Chongqing with a depth of 5-20 km. The imaging results show that the S wave velocity structure of shallow crustal in Chongqing area has lateral heterogeneity. There is a good correlation between the S wave velocity anomalies of Rayleigh wave and the distribution of fault structures in the study area. The mountain area with shallow basement is a high value anomaly area.

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备注/Memo

备注/Memo:
收稿日期：2018-08-30基金项目：地震监测、预测、科研三结合课题（CEA-JC/3JH-162201）；地震监测、预测、科研三结合课题（3JH-202001072）作者简介：魏红梅（1980- ），女，副研究员，主要从事地震监测工作。E-mail：124706259@qq.com.
更新日期/Last Update: 2020-04-18