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

Earthquake behavior of variable rupture-scale on active faults and application of the cascade-rupturing model
作者姓名:闻学泽
作者单位:WEN Xue-ze Seismological Bureau of Sichuan Province,Chengdu 610041,China
基金项目:Chinese Joint Seismological Science Foundation (95-07-423).
摘    要:IntroductionThe earlier concept of the characteristic earthquakes means those earthquakes recurring along the same portion of active fault zones, and having nearly the same size, displacement and rupture scale (Schwartz, Coppersmith, 1984). However, more and more evidences have suggested that the rupture(s scale of earthquakes recurred on an individual fault portion has variability (Thatcher, 1990). For instance, the rupture of the 1906 San Francisco, California, earthquake with magnitude 8.…

收稿时间:31 January 2001
修稿时间:11 June 2001

Earthquake behavior of variable rupture-scale on active faults and application of the cascade-rupturing model
WEN Xue-ze.Earthquake behavior of variable rupture-scale on active faults and application of the cascade-rupturing model[J].Acta Seismologica Sinica(English Edition),2001,14(4):404-416.
Authors:WEN Xue-ze
Institution:Seismological Bureau of Sichuan Province,
Abstract:This study reveals preliminarily the earthquake behavior of variable rupture-scale on active faults of the Chinese mainland, that is that on an individual fault portion earthquake(s rupture-scale varies cycle to cycle, and hence earthquake(s strength changes with time. The tendency of this variation has no necessity. On defining relative size of rupture scales, a statistical result shows that it is of the lowest probability that ruptures with the same scale occur in two successive cycles. While the rupture(s scale in the preceding cycle is (small(, the probability of the following rupture(s scale being (large( is as many as 0.48. While the rupture(s scale in the preceding cycle is (middle(, the probability of the succeeding rupture being (small( or (large( scale is 0.69 or 0.25. While the rupture(s scale in the preceding cycle is (large(, the probability must be zero for the following rupture with (large( scale, and is 0.36 or 0.64 for the following rupture with (small( or (middle( scale. The author introduces and improves the cascade-rupturing model, and uses it to describe the variability and complexity of rupture scale on individual fault portions. Basic features of some active strike-slip faults on which cascade ruptures have occurred are summarized. Basing on these features the author proposes principles of cascade-rupture segmentation for this type of faults. As an example to application, the author segments one portion of the Anninghe fault zone, western Sichuan, for its future cascade rupture, and further assesses the probable strength and its corresponding probability of the coming earthquake.
Keywords:active fault  rupture scale  cascade-rupturing model  earthquake strength  probability
本文献已被 CNKI 万方数据 SpringerLink 等数据库收录!
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