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Preliminary Analysis of the Relationship between the Magnitude Deviation of the Station and Site Response in the Fujian Digital Seismic Network 
Yang Gui,Xu Zhendong,Lin Binhua



摘要: 
Using the records of 3,069 regional earthquake events from the Fujian Digital Seismic Network from October 2008 to December 2015, in which the magnitude of each of the events was measured by at least six stations, statistics are taken on the deviation between the magnitude of a single station and the average magnitude of the network. It is found that the magnitude's average deviation of each station is 0.310.68. Statistics are also taken for the period corresponding to the maximum amplitude of the record measured in each station for calculating the magnitude, and the dominant period gained is 0.06s0.38s; site response of each seismic station is inverted using the Moya method, and it is found that the site response of 98 stations is in the bands of 120Hz, suggesting that the site has an amplifying or suppressing effect on the signals in certain frequency bands; Considering the site response corresponding to the inherent 0.8s period of the WoodAnderson pendulum seismograph, and comparing the magnitude deviation caused by the site response corresponding to the dominant period time of each station with the average magnitude deviation, we obtain that there is a good linear relationship between the magnitude deviation from the dominant period site response and the average deviation of the magnitude of each station, indicating that the magnitude deviation of a single station has a close relationship with the site response of the period corresponding to the maximum amplitude measured for calculating the magnitude. 
关键词: Fujian Digital Seismic Network Magnitude Magnitude deviation Site response 
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Preliminary Analysis of the Relationship between the Magnitude Deviation of the Station and Site Response in the Fujian Digital Seismic Network 
Yang Gui,Xu Zhendong,Lin Binhua

Abstract: 
Using the records of 3,069 regional earthquake events from the Fujian Digital Seismic Network from October 2008 to December 2015, in which the magnitude of each of the events was measured by at least six stations, statistics are taken on the deviation between the magnitude of a single station and the average magnitude of the network. It is found that the magnitude's average deviation of each station is 0.310.68. Statistics are also taken for the period corresponding to the maximum amplitude of the record measured in each station for calculating the magnitude, and the dominant period gained is 0.06s0.38s; site response of each seismic station is inverted using the Moya method, and it is found that the site response of 98 stations is in the bands of 120Hz, suggesting that the site has an amplifying or suppressing effect on the signals in certain frequency bands; Considering the site response corresponding to the inherent 0.8s period of the WoodAnderson pendulum seismograph, and comparing the magnitude deviation caused by the site response corresponding to the dominant period time of each station with the average magnitude deviation, we obtain that there is a good linear relationship between the magnitude deviation from the dominant period site response and the average deviation of the magnitude of each station, indicating that the magnitude deviation of a single station has a close relationship with the site response of the period corresponding to the maximum amplitude measured for calculating the magnitude. 
Key words: Fujian Digital Seismic Network Magnitude Magnitude deviation Site response 



