Distribution of Lg coda Q in Xinjiang and its adjacent regions

• Published in: Acta seismologica sinica Vol. 18; no. 2; pp. 162 - 170
• Main Author: 徐彦 毛燕 胡家富 苏有锦 丛连理
• Format: Journal Article
• Language: Chinese; English
• Published: Beijing Springer Nature B.V 01.03.2005; Department of Geophysics, Yunnan University, Kunming 650091, China; Earthquake Administration of Yunnan Province, Kunming 650041, China%Department of Geophysics, Yunnan University, Kunming 650091, China%Earthquake Administration of Yunnan Province, Kunming 650041, China
• Subjects: back-proje; Broadband; coda; Digital; Earthquakes; Geophysics; method; Plate tectonics; Platforms; ratio; Seismic engineering; Seismic phenomena; Seismology; Spectra; spectral; stacked; Stations; Lg coda; Q; back-projection technique; Xinjiang region; stacked spectral ratio method
• ISSN: 1674-4519; 1000-9116; 1867-8777; 1993-1344
• DOI: 10.1007/s11589-005-0063-3

In this study, we collected 1 156 broadband vertical components records at 22 digital seismic stations in Xinjiang region, Ueruemqi station, and 7 stations in the adjacent regions during the period of 1999-2003. The records were firstly processed by the stacked spectral ratio method to obtain Q sub(0) (Q at 1 Hz) and the frequency correlation factor corresponding to each path. Based on the results, the distribution images of Q sub(0) and in 11 grids for Xinjiang region were gained by the back-projection technique. The results indicate that Q sub(0) is high (300-450) in the Tarim platform and marginal Siberian platform, while Q sub(0) is low (150-250) in the southern regions as west Kunlun fold system and Songpan-Ganzi fold system. In the northern regions as Junggar fold system and Tianshan fold system, Q sub(0) is also low (250-300) and varies between 0.5 and 0.9.