地壳垂直形变的分维特征─以京、津、唐复测网为例

FRACTAL DIMENSION FEATURES OF CRUSTAL VERTICAL DEFORMATION IN BEIJING, TIANJIN AND TANGSHAN AREA

本文应用分数维的概念及方法，对京、津、唐地区１９６８─１９７５年的大面积地壳垂直形变复测成果数据处理后的结果进行了分维特征分析。结果表明，地震前该地区地壳垂直形变空间分布的分数维明显降低，地壳的有序性增强。本文认为，地壳垂直形变空间分布分数维能够明确地揭示地壳的有序程度，是一种较好地利用形变测量资料提取地震前兆异常的方法。

This paper uses the concept and method of fractal dimension to analyse the results of repeatition survey of crustal vertical deformation conducted in a large area of Beijing, Tianjin and Tangshan region during the period of from 1968 to 1975. The results show that the fractal dimension of spatial distribution of crustal vertical deformation obviously droped and ordered deformation of crustal rose in this region before earthquake. This paper thinks the fractal dimension of spatial distribution of crustal vertical defomation can reveal clearly ordered state of crustal and is a good method to pick up anomalies before earthquake utilizing deformation survey data.