The Mechanism of Long-Distance Jumping and the Migration of Main Active Areas for Strong Earthquakes Occurred in the Chinese Continent
详细信息
- 责任者：Yang Shuxin (Institute of Crustal Dynamics ; China Earthquake Administration ; Beijing 100085 ; China) ; Lu Yuanzhong
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(1)
- 关键词：强震 ; strong earthquakes ; 地震迁移 ; earthquake migration ; 中国 ; China
- 页码：p.105-116
- 图表：8 illus., 5 tables, 34 refs.
- 分类号：0500
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In this paper, a three-dimensional (3D) finite element model was set up for the Chinese continent involving surface topography,major active fault zones as well as initial stress field to study the mechanism of the long-distance jumping migration and the migration of main active areas for the strong earthquakes occurred in the Chinese continent by using numerical simulations. The results show that: 1) in an environment where always exists an initial stress field in the Earth’s crust, the area where a strong earthquake has occurred has no longer the ability to support high stress, which can lead to stress adjustment to the order of MPa in a large area, and may be one of the main factors affecting the long-distance jumping migration of the follow-up strong earthquakes; and 2) it is hard to accurately predict where the follow-up strong-earthquakes will occur because it could be affected by many factors, but in an active period of earthquakes, the major factor to affect the activity area and migration of strong earthquakes is the boundary loading configurations.