利用AOK时频变换分析短时气压扰动对分量应变的影响  

ANALYSIS ON INFLUENCE OF SHORT-TERM ATMOSPHERIC DISTURBANCES ON FOUR-COMPONENT BOREHOLE STRAIN BASED ON WAVELET DECOMPOSITION AND AOK TIME-FREQUENCY TRANSFORM

作　　者：袁媛[1] 李贞[1] 

机构地区：[1]上海市地震局,上海200062

出　　处：《内陆地震》2016年第4期350-357,共8页Inland Earthquake

基　　金：上海市科委14231202600项目;上海市地震局科技专项2015专4联合资助

摘　　要：主要利用自适应最优核时频变换方法,对佘山台四分量钻孔应变3次受气压短时扰动的特征进行了分析,结果显示短时气压扰动>27 min周期时影响显著,而且周期越长,应变变化与气压之间的相关程度越高。由此可见,自适应最优核时频变换在前兆资料中有较好的应用前景。Through Adaptive Optimal Kernel time-frequency transform, we analyzed the short-term atmospheric disturbance characteristics of four-component borehole strain on Sheshan station. The result clearly showed that when period of strain wave was longer than 27 minutes, the short-term pressure disturbances started to have a significant impact on the strain. By using AOK time-frequen- cy transform, we could get the energy intensity distribution in different frequency band, which may have good prospects on processing earthquake precursor data.

关 键 词：自适应最优核 时频分析 小波分解 短时气压 分量应变 

分 类 号：P315.7[天文地球—地震学]