首页 | 本学科首页   官方微博 | 高级检索  
     检索      

2010年玉树MS7.1地震前的中长期加速矩释放(AMR)问题
引用本文:蒋长胜,吴忠良.2010年玉树MS7.1地震前的中长期加速矩释放(AMR)问题[J].地球物理学报,2011,54(6):1501-1510.
作者姓名:蒋长胜  吴忠良
作者单位:中国地震局地球物理研究所,北京 100081
基金项目:国家科技支撑计划项目,国家自然科学基金青年基金项目
摘    要:2010年4月14日青海玉树MS7.1地震前的加速矩释放(AMR)现象的研究,对理解这次地震的孕震过程、对于时间相依的地震危险性分析(或中长期地震预测)具有重要意义.鉴于以往AMR研究中的争论,本文不刻意选取AMR分析的时空尺度,而是在已知发震时刻和震中位置情况下,对T-R-MC三维空间中矩释放指数m值的分布进行分析,...

关 键 词:时间相依的地震危险性分析  中长期地震预测  AMR现象  迁移图像  玉树地震
收稿时间:2010-09-25

Intermediate-term medium-range Accelerating Moment Release (AMR) priori to the 2010 Yushu MS7.1 earthquake
JIANG Chang-Sheng,WU Zhong-Liang.Intermediate-term medium-range Accelerating Moment Release (AMR) priori to the 2010 Yushu MS7.1 earthquake[J].Chinese Journal of Geophysics,2011,54(6):1501-1510.
Authors:JIANG Chang-Sheng  WU Zhong-Liang
Institution:Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
Abstract:Investigation of the accelerating moment release (AMR) phenomena plays an important role in understanding the preparation process of the April 14, 2010, Yushu MS7.1 earthquake, with implications to time-dependent seismic hazard assessment or intermediate-term medium-rage earthquake forecast. Considering the debates related to AMR study, we avoid the special selection of the spatio-temporal ranges for the AMR analysis. Alternatively, we investigate the distribution of m value, the exponent in the power-law-like 'time-to-failure’ function describing the moment release, in the (T-R-Mc) space, where T and R are the scales of temporal and spatial window, respectively, and Mc is the cutoff magnitude of earthquake catalogue in use. The failure time and center of the spatial range were fixed at the origin time and the epicenter of the mainshock. Stable pre-shock AMR can be observed at the time scale T=10~20y and spatial range R=50~120 km. But such T and R are not consistent with those deduced from the scaling relation obtained by previous studies. With varying time scale T, it is difficult to find a self-similar pattern of AMR 'hot spots’ around the epicenter of the Yushu MS7.1 earthquake. Using the 'migration pattern’ method, it can be found that the AMR pattern migrated to the epicenter before the earthquake.
Keywords:Time-dependent seismic hazard  Intermediate-term medium-range earthquake forecast  Accelerating moment release (AMR)  Migration pattern  Yushu earthquake
本文献已被 万方数据 等数据库收录!
点击此处可从《地球物理学报》浏览原始摘要信息
点击此处可从《地球物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号