• 责任者：Wang Huilin (Earthquake Administration of Hainan Province ; Haikou 570203 ; China) ; Zhang Xiaodong
• 刊名：Acta Seismologica Sinica
• 出版年：2012
• 卷期：34(5)
• 关键词：水库地震 ; reservoir earthquake ; 地震活动性 ; seismicity ; 四川 ; Sichuan Province
• 页码：p.676-688
• 图表：6 illus., 1 table, 28 refs.
• 分类号：0500
• issnNo：ISSN0253-3782
• isbnNo：CN11-2021/P

Using a two-dimensional seismic attenuation tomography technique, the crustal Qs dynamic variation in Zipingpu reservoir area, Sichuan Province, was obtained by inverting S wave data from relocated earthquakes from 16 Aug 2004 to 11 May 2008 with the double-difference algorithm. The result shows that low-Q_s region expanded and Q_s value aroppeu significantly around the reservoir area during the first fast water-loading period. In particular, Q_s value varied remarkably in the southwestern, northeastern and middle parts of the reservoir area. Monthly moving average Q_s values for different-sized regions in the Zipingpu reservoir area decrease with elapsed impoundment time and increased water level, and the Q_s value in the middle reservoir area dropped sharply.Furthermore, the impoundment enhanced seismic activity in the reservoir area, and mainly increased activity of small earthquakes of M_L0. 0～2. 0.