Imaging the Rupture of 14 April, 2010 Yushu Earthquake Using Back-Projection of Global Subarray P-Waves

详细信息   

• 责任者：Xu Yan (Earthquake Administration of Yunnan Province ; Kunming 650224 ; China) ; Zhang Junwei
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(5)
• 关键词：玉树地震2010 ; Yushu earthquake 2010 ; 青海 ; Qinghai Province
• 页码：p.1243-1250
• 图表：5 illus., 20 refs.
• 分类号：0500
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The authors present the rupture details of Yushu earthquake from the back projection of teleseismic P waves. By applying ARF the authors get 29 out of 206 stations with distance range of 30 to 95 degree, which have a good array response function and high waveform cross-correlation coefficient, in the final back projecting process. The back projection result shows that the total rupture time of the Yushu earthquake is 20 sec, and the rupture length is 60 km. The energy release of the Yushu earthquake is mainly concentrated at two time-space points. One is about 6 sec after the origin time and close to the epicenter. The second energy burst is 12 sec after the origin time and located southeast of the epicenter closing to the Jiegu County. This energy burst is the biggest energy burst in the whole source rupture process.