断层蠕变的分维变化及其与地震之关系  

CHANGES OF FRACTAL DIMENSION OF FAULT CREEP AND THEIR RELATIONS TO EARTHQUAKE

作　　者：吕弋培[1] 王兰[1] 苏琴[1] 

机构地区：[1]四川省地震局地震测量队,雅安625000

出　　处：《地壳形变与地震》1999年第4期62-67,共6页Crustal Deformation and Earthquake

摘　　要：据鲜水河断裂带连续蠕变观测资料，利用重建动力学方法，分别计算了各测点原始观测值、趋势形变值和消去趋势值后的残差值的关联维ｄ２。结果显示：蠕变观测时间序列不同成分的关联维变化，反映出不同的构造运动信息；关联维的大小与断层不同部位的活动有关，反映出断层的分段活动特性；各点关联维变化与测点周围的地震活动有关。Based on the data of continuous creep measurement on Xianshuihe fault zone, the correlation dimension of original record, trend deformation values and residual value after eliminating the trend are calculated by using the method of dynamics reconstruction.The results show that the change of correlation dimension of creep measurement time series reflects the different tectonic movement. The values of correlation dimension is related to the activity of different part on fault, and it reflects characteristics of fault segmentation. The change of correlation dimension is related to earthquakes around measurement site, and the dimension drop is a precursor of earthquake.

关 键 词：构造运动 蠕变 关联维 断层 地震 分维变化 

分 类 号：P315.2[天文地球—地震学] P315.63[天文地球—固体地球物理学]