前驱波还是气压波?——与“汶川M_(S)8.0地震前山西前兆低频前驱波特征分析”作者商榷  

Precursory or atmospheric waves?——Comments on“Analysis of characteristics of precursor wave of low frequent in Shanxi before Wenchuan M_(S)8.0 earthquake”by Zhang et al(2009)

作　　者：杨小林 杨锦玲 危自根 Yang Xiaolin;Yang Jinling;Wei Zigen(Shaanxi Seismic Station,Xi’an 710068,China;Fujian Seismic Station,Fuzhou 350003,China;Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]陕西地震台,西安710068 [2]福建地震台,福州350003 [3]中国科学院精密测量科学与技术创新研究院,武汉430071 [4]中国地质科学院地质研究所,自然资源部深地动力学重点实验室,北京100037

出　　处：《地震科学进展》2021年第11期522-527,共6页Progress in Earthquake Sciences

基　　金：自然资源部深地动力学重点实验室开发研究课题(J1901-16);中国科学院战略先导B类专项(XDB41000000)联合资助。

摘　　要：2008年5月11日山西地区5个地壳形变测项出现了“前驱波”信号,但其真实的物理本质究竟如何?至今仍存质疑。为此,本文借助小波变换方法对气压波和“前驱波”在不同时、频段的相关性进行了较系统的诊断;还进一步将“前驱波”与短时气压波动所产生的干扰实例进行了对比分析。结果表明:这些“前驱波”并非源自汶川M_(S)8.0地震,而主要是气压波动的干扰。On May 112008,some“precursory waves”were obviously recorded at five stations in Shanxi Province,but their real physical nature is still under debate.To uncover these important phenomena,we adopt the wavelet transform method to diagnose the correlations between atmospheric and precursory waves at different frequency bands.Furthermore,we compare the typical variations induced by the fluctuations of atmospheric pressure to the“precursory waves”aiming to analyze the similarities between them.The results show that the physical origin of these“precursory waves”mainly comes from the atmospheric waves rather than from the Wenchuan M_(S)8.0 earthquake.

关 键 词：前驱波 气压波 汶川地震 地壳形变 小波变换 山西 

分 类 号：P315.72[天文地球—地震学]