Improvement and Seismicity Analysis of Fault Motion Coordination Ration
详细信息
- 责任者：Li Ruisha (Second Crust Monitoring and Application Center ; CEA ; Xi’an 710054 ; China) ; Zhang Xi
- 刊名：Earthquake Research in China
- 出版年：2013
- 卷期：29(1)
- 关键词：活动构造 ; active tectonics ; 丽江地震1996 ; Lijiang earthquake 1996 ; 云南 ; Yunnan Province
- 页码：p.75-80
- 图表：illus., 15 refs.
- 分类号：0500
- issnNo：ISSN1001-4683
- isbnNo：CN11-2008/P
摘要
Based on the concept of fault motion coordination ration (FCR), the paper discussed the effect of the starting point on the result of FCR calculation and proposed a calculation method of FCR using sliding windows and an evaluating index of dispersion. The case study of the Lijiang site indicates that the FCR of Lijiang site distributed more widely and discretely before the M7.0 Lijiang earthquake than after it, which reflected strain accumulation and caused poor movement coordination during the seismogenic period. After the earthquake the fault is in a free activity state, and the accumulated strain energy is released, and 3-component movements are consistent to each other. At present, FCR dispersion of Lijiang is low and fault strain accumulation is also at a low level.