冀鲁豫交界区地下流体的合成信息熵值变化与地震的关系
|
摘要
采用概率化预处理方法 ,把冀鲁豫交界区地下流体多种观测项目的观测值转化为概率值时间序列 ,在此基础上计算了该区地下流体构成的信息源系统的合成信息熵值 ,分析了合成信息熵值变化与 1 983年菏泽 Ms5.9级地震和 1 985年河北任县 Ms5.0级地震的关系 ,结果显示 ,在这两次中强地震前分别有两次明显的减熵异常过程 ,并且一次比一次减熵过程更明显 ,中强地震都发生在低熵值处 ,震后恢复到高熵值。这可能反映了地下流体构成的信息源系统在地震孕育和发生过程中的减熵有序变化。通过研究认为该区减熵到 0 .45为发震前兆异常警戒线 ,并且离中强地震发生的时间越近 ,减熵过程越大 ;震级越大 ,减熵过程越明显
Based on probabilistic preprocessing,The observation values for the observed items of subsurface fluid in the joint area of Hebei,Shandong and Henan province have been transformed into probability and time sequence.The synthetic information entropy of the information source system formed by subsurface fluid in the area is calculated.The relation between the variation of the synthetic information entropy and Heze M s5.9 earthquake (1983) and Renxian Ms5.0 earthquake (Hebei province,1985)is analyzed.The results show:there are two times obvious entropy decreasing before the two events and the later is more distinct than the former.The two events both occurred at the low entropy moment.The entropy recovered after the shocks.This process reflects maybe the ordinal change of the entropy decreasing in the course of earthquake development and occurrence for a subsurface fluid information system.Study shows 0.45 is the precursory anomalies' alarm line for an earthquake in the area,and the closer to an earthquake,the larger the entropy decreasing,the greater the magnitude of the earthquake.
Based on probabilistic preprocessing,The observation values for the observed items of subsurface fluid in the joint area of Hebei,Shandong and Henan province have been transformed into probability and time sequence.The synthetic information entropy of the information source system formed by subsurface fluid in the area is calculated.The relation between the variation of the synthetic information entropy and Heze M s5.9 earthquake (1983) and Renxian Ms5.0 earthquake (Hebei province,1985)is analyzed.The results show:there are two times obvious entropy decreasing before the two events and the later is more distinct than the former.The two events both occurred at the low entropy moment.The entropy recovered after the shocks.This process reflects maybe the ordinal change of the entropy decreasing in the course of earthquake development and occurrence for a subsurface fluid information system.Study shows 0.45 is the precursory anomalies' alarm line for an earthquake in the area,and the closer to an earthquake,the larger the entropy decreasing,the greater the magnitude of the earthquake.
引文
1)郭德科等 ,水氡前兆观测数据的信息熵探讨 ,地方地震工作 ,1 994 ,1 3( 4)
[1 ] 郭德科 .灰色系统 GM模型在地下水动态异常识别中的应用 .地震研究 ,1 996,1 9( 1 ) :58-64.
[2 ] 王海涛 ,等 .多种前兆观测数据的合成信息熵研究 .西北地震学报 ,1 998,2 0 ( 1 ) :37-4 1 .
[3] 张昭栋 ,等 .聊古 1井氮氦比的熵值变化与地震的关系 .地震研究 ,1 997,2 0 ( 4) :393-397.
[4 ] 张昭栋 ,等 .聊古 1井氮氦比区间概率信息量与地震的关系 .西北地震学报 ,1 998,2 0 ( 1 ) :51— 53.
[1 ] 郭德科 .灰色系统 GM模型在地下水动态异常识别中的应用 .地震研究 ,1 996,1 9( 1 ) :58-64.
[2 ] 王海涛 ,等 .多种前兆观测数据的合成信息熵研究 .西北地震学报 ,1 998,2 0 ( 1 ) :37-4 1 .
[3] 张昭栋 ,等 .聊古 1井氮氦比的熵值变化与地震的关系 .地震研究 ,1 997,2 0 ( 4) :393-397.
[4 ] 张昭栋 ,等 .聊古 1井氮氦比区间概率信息量与地震的关系 .西北地震学报 ,1 998,2 0 ( 1 ) :51— 53.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心