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Basic Station Selection and Instrument Analysis of Inner Mongolia Seismic Intensity Rapid Reporting and Early Warning Project

WANG Xin;ZHANG Hao-ming;AN Quan;Earthquake Administration of Inner Mongolia;  
24 hours stable acceleration noise data of 10 basic stations of Inner Mongolia seismic intensity rapid reporting and early warning project were used, the data comes from the accelerometer record. The noise power spectrum and the root mean square value of acceleration noise are calculated. Combined with the accelerometer's frequency characteristics and the self-noise power spectrum, the noise level and noise power spectrum distribution characteristics of each test point are analyzed comprehensively, it is concluded that the noise level requirements of the basic station is all satisfied by 10 test points, and the measured noise power spectrum of each site in the range of 0.003~3 Hzfrequency band reflects the self-noise of the accelerometer. In general, the self-noise level of the accelerometer itself is relatively high, it is possible to use the accelerometer as a test instrument if the noise level of the basic station as the basic requirements. However, the noise level of multiple frequency points in the range of 1~20 Hzfrequency band cannot be comprehensively evaluated using this instrument.
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