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Research of Background Noise Characteristics of the Zhangzhou Seismic Array

Research of Background Noise Characteristics of the Zhangzhou Seismic Array
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摘要 The data recorded during the site survey in the Zhangzhou area in Fujian Province between October 23, 2007 and December 3, 2007 was analyzed. The main methods adopted for the noise level of this area are the noise root mean square( RMS),noise power spectrum density and noise coherency function. The results indicate that the noise levels of the survey sites are higher in the 1 s-10 s periods,which is the main frequency band of preliminary microseism,and also,two main noise sources were found in 1. 5 Hz and around 5 Hz. According to arithmetic,the direction and frequency band of the noise source were analyzed and academic proofs were presented. At last,we found that the noise source in 1. 5 Hz was made by the water wave aroused by the wind in the reservoir region and the noise source around 5 Hz was made by the power station in the northeast direction. The data recorded during the site survey in the Zhangzhou area in Fujian Province between October 23, 2007 and December 3, 2007 was analyzed. The main methods adopted for the noise level of this area are the noise root mean square( RMS),noise power spectrum density and noise coherency function. The results indicate that the noise levels of the survey sites are higher in the 1 s-10 s periods,which is the main frequency band of preliminary microseism,and also,two main noise sources were found in 1. 5 Hz and around 5 Hz. According to arithmetic,the direction and frequency band of the noise source were analyzed and academic proofs were presented. At last,we found that the noise source in 1. 5 Hz was made by the water wave aroused by the wind in the reservoir region and the noise source around 5 Hz was made by the power station in the northeast direction.
出处 《Earthquake Research in China》 CSCD 2017年第4期548-559,共12页 中国地震研究(英文版)
基金 sponsored by the Earthquake Monitoring System Operational Program of Department of Earthquake Monitoring and Prediction,CEA,in 2016(2200404)
关键词 SMALL APERTURE SEISMIC ARRAY Space noise FIELD ARRAY design Noise SOURCE Small aperture seismic array Space noise field Array design Noise source
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