体应变的气压效应
|
摘要
通过对河北省张家口地震台体应变和气压观测的对比分析 ,探讨了消除气压干扰的方法。指出用别尔采夫滤波法去掉体应变固体潮和气压的短期变化 ,用回归方程、相关分析、求气压系数 ,计算体应变残差等可排除气压干扰。结果表明 ,当体应变观测曲线出现异常时 ,消除气压干扰后 ,异常更加明显 ,更有利于对异常的识别和判断。发现去掉干扰后的体应变曲线与 1 998年 1月 1 0日河北张北 6.2级地震存在一定的对应关系。
Through comparative analysis of body strain and atmospheric pressure observation,the method of eliminating interference of atmospheric pressure is discussed The short period change of earth tide and atmospheric pressure is eliminated with Filter wave method,the interfere of atmospheric pressure is cleared up with recursive equation,correlation analysis, counting atmospheric pressure coefficient, calculation of body strain etc While body strain anomalies occur and interference is cleared up,anomalies will be more obvious and judged more expediently The curve of body strain after eliminating interfere accords with the Zhangbei 6 2 earthquake on January 10,1998
Through comparative analysis of body strain and atmospheric pressure observation,the method of eliminating interference of atmospheric pressure is discussed The short period change of earth tide and atmospheric pressure is eliminated with Filter wave method,the interfere of atmospheric pressure is cleared up with recursive equation,correlation analysis, counting atmospheric pressure coefficient, calculation of body strain etc While body strain anomalies occur and interference is cleared up,anomalies will be more obvious and judged more expediently The curve of body strain after eliminating interfere accords with the Zhangbei 6 2 earthquake on January 10,1998
引文
[1 ] 陈鑫连 ,张奕麟 ,蔡惟鑫 .地壳变动连续观测技术 [M] .北京 :地震出版社 ,1 989.95.
[2 ] 张凌空 ,何世海 ,刘北顺 .体应变观测中的气压干扰机制和排除方法的研究 [J] .地震 ,1 996,1 6(2 ) :1 4 4 - 1 51
[2 ] 张凌空 ,何世海 ,刘北顺 .体应变观测中的气压干扰机制和排除方法的研究 [J] .地震 ,1 996,1 6(2 ) :1 4 4 - 1 51
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