乌什台地倾斜资料的小波分析研究  

STUDY ON WAVELET ANALYSIS OF TILT AT WUSHI STATION

作　　者：孙甲宁[1] 温和平[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《高原地震》2006年第4期1-8,共8页Plateau Earthquake Research

基　　金：新疆地震科学基金(200507)资助

摘　　要：结合乌什台地倾斜开始观测以来的震例,利用基于小波分析的多尺度分析原理对乌什台地倾斜的日均值观测序列进行了分析,总结了乌什台地倾斜多尺度分析结果的映震特征。乌什台地倾斜多尺度分析结果在绝大多数地震前存在超阈值异常且具有较好的重复性,即一般都是在异常结束后几个月之内发生地震,个别情况下地震会发生在高值异常持续时段内。初步可以认定,利用基于小波变换的多尺度分析原理将地倾斜资料分解成若干频段后,能够较好地识别和提取地倾斜原始测值中不易分辨的中短期地震异常信息。The multi - scale analysis method based on BWT was used to analyze the daily mean of tilt data at Wushi station, combining with some cases since Wushi tilt started to be observed. And we summarized the characteristics of reflecting earthquakes of multi - scale analysis results about the Wushi tilt. Most anomalies of seismic prognostic in Wushi tilt are above - threshold ones, and have some relatively good repeatability. That is, the earthquake often occurred within several months after anomalies with high value ended. However, individual earthquakes occurred in the process of high value anomaly. According to the preliminary analysis,we thought, after we separated the data of tilt into several parts with different frequency, the multi - scale analysis method based on BWT is able to identify and extract very well some anomalies of not easily to identify in the raw data of tilt before the earthquake.

关 键 词：乌什 地倾斜 小波分析 地震预报 

分 类 号：P315.31[天文地球—地震学]