海南地区5口井水位对汶川地震的同震响应及其频谱分析

英文篇名：Analysis of the Characteristics of Coseismic Records of Five Wells' Water Level in Hainan Area in the M_S8.0 Wenchuan Earthquake Event
中文刊名：地震研究
英文刊名：Journal of Seismological Research
作者：顾申宜 ; 李志雄 ; 张慧
英文作者：GU Shen-yi ; LI Zhi-xiong ; ZHANG Hui (Earthquake Administration of Hainan Province ; Haikou 570203 ; Hainan ; China)
中文关键词：汶川地震 ; 数字化水位记录 ; 同震效应 ; 小波变换 ; 海南地区
英文关键词：Wenchuan strong earthquake ; digital records of well water level ; coseismic effects ; wavelet transform ; Hainan area
出版日期：2010-01-15
机构：海南省地震局;
年：2010
期：01
出版单位：地震研究

摘要

对比海南地震台网记录的汶川MS8.0地震的地震波形,分析了海南5口井的高采样率数字化水震波波形特征。采用傅立叶变换和小波分解方法,对海南前兆台网5个台水位仪在汶川MS8.0地震中记录到的高采样率数字化水震波进行了频谱分析,结果显示地震波的不同波组激发的水震波波组差别较大,5口井的水震波周期跨度很大,从10多秒到1000多秒,不同井孔的水震波幅度差别较大。同时还初步分析了水震波的形态和水震波各个频率组的形成机理。
By comparison of the seismic waves of MS8.0 Wenchuan earthquake recorded by Hainan Digital Seismic Network and the water-seismic waves,the waveform characteristics of the water-seismic waves were analyzed.We also analyzed the spectrum and time features of the water-seismic waves with high sampling rate of Wenchuan earthquake recorded by five water-level meters of Hainan Seismic Precursor Network by means of FFT and Wavelet Transform.The result shows that the variation between the different wave groups of water-seismic waves caused by the different seismic wave groups were great;the periodic range of the water-seismic wave at the five well in Hainan area were large(from 10 s to more than 1000 s)and the difference of the amplitudes of water-seismic waves at different wells also were great.The formation mechanisms of waveforms and different frequency groups of the water-seismic waves were analyzed preliminarily.

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