强干扰环境下有效数字地震信号的提取
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摘要
城市扩张和人类活动所带来的环境干扰已经越来越严重地影响到地震监测,给地震参数的确定和其他地球物理研究造成不确定性。本研究以处于高环境噪声的防灾地震台记录的2008年5月12日汶川地震波形资料为例,给出如何采用数字信号处理手段从强干扰环境下提取到地震波有效信号,并按方位角和出射角方向对地震信号各分向信号进行了分解与组合,最后归纳出提取有效信号的一般过程。
As expand of cities and intension of human activities,earthquake monitoring has become more and more disturbed by the environmental noise.This interfere the determination of earthquake parameters and other geophysical phenomenon study.Based on the seismic wave data of Wenchuan earthquake on May 12,2008 recorded by the Fangzai seismic station at the high environmental noise,we present the method of how to extract the effective seismic wave signal from the strong environment noise by means of the digital signal processing.Based on the direction of the azimuth angle and the emergence angle,we recombine the signal of 3components of the seismic wave record to identify the first arrivals of seismic wave.Finally,we summarize the general process of extracting the effective seismic signal.
As expand of cities and intension of human activities,earthquake monitoring has become more and more disturbed by the environmental noise.This interfere the determination of earthquake parameters and other geophysical phenomenon study.Based on the seismic wave data of Wenchuan earthquake on May 12,2008 recorded by the Fangzai seismic station at the high environmental noise,we present the method of how to extract the effective seismic wave signal from the strong environment noise by means of the digital signal processing.Based on the direction of the azimuth angle and the emergence angle,we recombine the signal of 3components of the seismic wave record to identify the first arrivals of seismic wave.Finally,we summarize the general process of extracting the effective seismic signal.
引文
[1]黄金莉,赵大鹏.首都圈地区地壳三维P波速度细结构与强震孕育的深部构造环境[J].科学通报,2005,50(4):348-349.
[2]崔合有.铁路列车运行噪声的环境质量影响与控制措施探讨[J].科技风,2009,13:161.
[3]李丽,彭文涛,李刚,等.可作为新震源的列车振动及实验研究[J].地球物理学报,2004,47(4):680-684.
[4]李文军,李丽,陈棋福.用震源扫描算法(SSA)研究列车源的运动[J].地球物理学报,2008,51(4):1 146-1 151.
[5]陈棋福,李丽,李纲,等.列车震动的地震记录信号特征[J].地震学报,2004,26(6):651-659.
[6]万永革.数字信号处理的MATLAB实现[M].北京:科学出版社,2007:197-199.
[7]傅淑芳,朱仁益.高等地震学[M].北京:地震出版社,1997:559.
[2]崔合有.铁路列车运行噪声的环境质量影响与控制措施探讨[J].科技风,2009,13:161.
[3]李丽,彭文涛,李刚,等.可作为新震源的列车振动及实验研究[J].地球物理学报,2004,47(4):680-684.
[4]李文军,李丽,陈棋福.用震源扫描算法(SSA)研究列车源的运动[J].地球物理学报,2008,51(4):1 146-1 151.
[5]陈棋福,李丽,李纲,等.列车震动的地震记录信号特征[J].地震学报,2004,26(6):651-659.
[6]万永革.数字信号处理的MATLAB实现[M].北京:科学出版社,2007:197-199.
[7]傅淑芳,朱仁益.高等地震学[M].北京:地震出版社,1997:559.
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