利用小波包方法分析新疆南部地震前长波辐射异常

摘要

Chinese scholars have been searching the relationship between thermal radiation abnormity before earthquake for a long time,through a lot of example analysis research.They fully explain the feasibility of this method.In this paper,I select several more than 5 .0 magnitude earthquakes in south Xinjiang over the last ten years for analysis,and put ereryday′s long-wave radiation datum substracted the mean.This will exclude the fluctuation interference, and then I use wavelet packet to decompose and reconstruct data difference and find some degrees of energy attenuation in most earthquakes in south Xinjiang.There is some corre-spond realtion between the time of energy attenuation and the magnitude of earthquakes. These phenomena maybe serve as a kind of reference before earthquake.It also provide a new auxiliary method in monitoring earthquakes.%以新疆南部为主要研究区域，选取2003-2010年MS＞5．0典型震例进行分析，将长波辐射日值数值与历年日值数据均值相减，排除年际数据波动干扰，采用小波包方法，对均一化处理后的差值进行分解重构，发现新疆南部地区地震前小波包重构信息均有不同程度的能量衰减现象，且能量衰减时间长短与地震震级之间存在一定对应关系。该现象可以作为地震前兆异常信息参考，为地震预报提供辅助监测手段。