摘要
本文通过对全国许多地区大量的小震及中、强地震主压应力轴分布情况的详细研究，发现地震主压应力轴的分布具有分形结构特征，并满足幂函数关系式ｌｇＮ＝ａ＋ｂＪ，其特征值ｂ与分数维大致成反比，无标度区约为２°－８°。中强以上地震的前震序列的地震主压应力轴分布的特征值似乎明显比小震群活动的地震主压应力轴分布的特征值大。
The distribution of P-axes of small earthquakes, moderate and strong earthquakes in many area of the country were studied thoroughly in the paper. The fractal structure characteristics were discovered in the complex phenomena of distribution of seismic P-axes direction. The power functional relations abided by the distribution of seismic P-axes direction is obtaines: ig N=a+b J. The characteristic value b of seismic P-axes direction distribution is about an inverse measure of the dimension. No scale area range is about 2°to8°.The characteristic value of P-axes distribution of fore-shock sequence of moderately strong and strong earthquakes seem obviously larger than the characteristic value of P-axes distribution of small earthquake swarm.
出处
《中国地震》
CSCD
北大核心
1994年第2期129-135,共7页
Earthquake Research in China
