2013年海西5.0级地震波形时频特性研究  

STUDY ON THE TIME-FREQUENCY CHARACTERISTICS OF HAIXI 5.0 EARTHQUAKE WAVE FORM IN 2013 IN QINGHAI PROVINCE

作　　者：李玮杰[1] 万玉杰[1] 

机构地区：[1]青海省地震局,青海西宁810000

出　　处：《高原地震》2014年第2期12-15,共4页Plateau Earthquake Research

基　　金：青海省地震科学基金(2012A04)

摘　　要：传统的傅里叶变换因缺乏信号局域性的信息,无法对地震波等非平稳信号进行全面描述,时频分析通常是分析非平稳信号较好的工具。本文利用大柴旦地震台记录到的2013年6月5日青海海西5.0级地震波形,采用赵—阿特拉斯—马克时频分布(ZAM)分别研究了该地震P波、S波段的时间—频率特征。研究结果很好地解释了地震波的非平稳性,较全面地展示了地震波的衰减特征。The traditional Fourier transform of signal lacks the local information, and can not describe the non-stationary signal of earthquake wave. The time-frequency analysis is usually a good tool for analyzing non-stationary signal. Using the seismic wave form of Haixi 5.0 earthquake in Qinghai province on June 5, 2013 recorded by Dachaidan seismic station, the time-frequency characteristics of seismic P wave and S wave arestudied by Zhao-Atlas-Mark（ZAM） distribution. The results interprete the non-stationarity of the seismic waveand demonstrate the seismic wave attenuation characteristics.

关 键 词：海西地震 时频分析 ZAM分布 

分 类 号：P315.3[天文地球—地震学]