摘要
对云南省几个不同地区的强震孕震阶段及临震时的地震空间分维Ｄｑ（ｑ＝０，１，２，）及ｂ值进行了计算和研究，发现虽然在孕震阶段各地区的Ｄｑ及ｂ值均有着共同的下降主趋势，但临震时不同区域的Ｄｑ及ｂ的变化形态却存在着差异，大地震可能发生在Ｄｑ及ｂ值均降至最低时，也可能发生在Ｄｑ及ｂ值下降后又回升之时，还可能发生在Ｄｑ回升而ｂ值仍保持最低时。本文着重对Ｄｑ及ｂ值的临震变化特征及其个体差异从非线性的角度作了物理机制上的探讨，这些特征及差异与孕震系统内部的非线性本质及非线性的相互作用密切相关，同时还讨论了地震空间分维和反映断层几何分维的ｂ值之间的联系。
Seismic spatial fractal dimension Dq and b Value in different areas of Yunnan Province during seismogenic period and earthquake-impending time are calculated and studied. The results indicate that the variation patterns of Dq and b value in different areas have commom descendant tendency during seismogenic period,but with different earthquake-impending time.Strong earthquakes probably happen at the lowest valu of Dq and b value,or at the time of Dq and b value's rising again after a fall,or at the time of value's fall but Dq's rising again.This paper has emphatically explored the mechanism of earthquake-impending characteristics and their individual differences from the non-linear view.The characteristics and differences are closely ralated to the seismogenic system of interior non-linear nature and interaction.
出处
《地震研究》
CSCD
北大核心
1996年第1期42-49,共8页
Journal of Seismological Research
