大华北地震动态重力监测网分形特征研究  

FRACTAL CHARACTERISTICS OF SEISMOLOGICAL DYNAMIC GRAVITY NETWORK IN NORTHERN CHINA

作　　者：李辉[1,2] 徐如刚[3] 申重阳[1,2] 郝洪涛[1,2] 孙少安[1,2] 周新[1,2] 

机构地区：[1]中国地震局地震研究所,武汉430071 [2]地壳运动与地球观测实验室,武汉430071 [3]安徽省地震局,合肥230031

出　　处：《大地测量与地球动力学》2010年第5期15-18,共4页Journal of Geodesy and Geodynamics

基　　金：科技部公益研究专项(2005DIB3J120);中国地震局专项

摘　　要：从分形几何学角度研究优化后的大华北地震动态重力监测网的分形特征,给出优化后监测网的分维数D1=1.612、最佳化网格间距r=44 km。对优化后大华北地震动态重力监测网的监测能力的分析结果表明:测网的最佳化网格间距与Ms5.0地震诱发的重力场变化区域的特征异常区半径基本相当;测网对Ms5.0以上地震具有较好的监测能力。The fractal characteristics of earthquake dynamic gravity network in Northern China is researched and its fractal dimension D1 = 1. 612 and the optimum gridding interval r=44 km are calculated respectively. From the perspective of fractal geometry, the ability of monitoring of Seismological Dynamic Gravity Network in North China is analyzed. The results show that the optimum interval approximates to the anomaly radius of gravity field change region, which is induced by earthquake of Ms = 5.0 ; Gravity Network has good ability to monitor and pre- dict the earthquake of Ms 〉 5.0.

关 键 词：大华北 地震重力网 分形特征 信息维 网格间距 

分 类 号：P315.725[天文地球—地震学]