攀西地区“逻辑树”地震区划结果及其对比
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摘要
按照地震危险性分析的技术思路,讨论了b值、年均发生率和地表空间分布函数等的确定方法,最后以多参数方案组合成“逻辑树”,对攀西地区重新进行了地震烈度区划。结果表明,地震烈度区划图受多种不确定因素影响,需要在地震安全性和投资效益之间谋求某种平衡,在认识水平有限的情况下,以“逻辑树”方法进行地震烈度区划不失为目前一种较好的方法。
On the basis of the technological route of seismic hazard analysis, the methods for determining the seismicity parameters of b values, annual occurrence rates and seismic spatial distribution functions have been discussed. Then, the seismic intensity zoning map of Panxi area in Southwest China is given out by the "logical-tree" which is made up by multi-parameter acts. It is stated clear by the results that the seismic intensity zoningmap is influenced by many uncertain elements and it is necessary to seek a certain balance between seismic safety and investment interest and it could be regarded as a good at present limited knowledge level to obtain seismic intensity zoning map through "logical tree" method.
引文
国家地震局,1992,中国地震烈度区划图(附说明书),地震出版社,北京。时振梁、鄢家全、高孟潭,1991,地震区划原则和方法的研究──以华北地区为例。地震学报,Vol.13,No.2,179~188。四川地震简目编辑组等,1688,西南地震简目(川,滇,黔,藏)。四川科学技术出版社,成都。唐荣昌、黄祖智、张耀国、雷建成,1992,石棉-西昌地区地震区划研究,成都科技大学出版社,成都。云南省地震局等,1993,云贵川藏历史有感地震简目(M=3.5~4.6)。成都科技大学出版社,成都。

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