小波分析方法在提取井水位潮汐因子震前变化特征的初步应用  

Preliminary Application of Wavelet Analysis Method to Extract the Characters of Tidal Factor in Well Water Level before Earthquakes

作　　者：杨从杰[1] 冯志生[1] 宋德伟[1] 张秀霞[1] 梅卫萍[1] 张晓勇[1] 

机构地区：[1]江苏省地震局,江苏南京210014

出　　处：《西北地震学报》2005年第2期163-167,共5页Northwestern Seismological Journal

基　　金：江苏地区中强震前井水位固体潮的变化特征研究(200302)

摘　　要：运用小波分析方法对1990年常熟、1995年苍山和1996年南黄海三个中强地震前江苏地区井水位固体潮的变化特征进行了研究,发现井水位M2波潮汐因子在地震前几个月几乎都出现一个幅度较大、周期为半月或一个月左右的异常信号,表明小波分析方法在处理和分析井水位潮汐资料方面可能是一种有效的方法。The wavelet analysis is used to study the change characters of solid tide in well water level before three mid-strong earthquakes, which are Changshu earthquake in 1990, Cangshan earthquake in 1995 and Huanghai earthquake in 1996. The results reveal that the M2 tidal factor in well water level appear the abnormal signals which have a bigger amplitude, half or one months period. It indicates the wavelet analysis method may be an effective method in processing and analyzing water level tidal data for analyzing the change characters of abnormal signals.

关 键 词：小波分析 井水位 M2波潮汐因子 异常信号 

分 类 号：P315.723[天文地球—地震学]