Performance and Record Data Coherence Analysis of GL-CS120 and JS-120 Seismometers
WU Shuang
ZHU Chenglin
CUI Huawei
HU Xuhui
WANG Jiemin
Abstract：GL-CS120 and JS-120 very broadband seismometers are widely used in China.They are also used in the new base station of the"National Seismic Intensity and Rapid Reporting and Early Warning Project—Shandong Sub-Project".However,there are differences in performance and various indicators between the two types of seismometers.In this study,GL-CS120 and JS-120 seismometers were installed on the same base,and the data recorded at identical frequenciesare were compared and analyzed.The dynamic observation range,self-noise of the seismometers,and coherence of data recorded at different periods were subsequently calculated.The results indicate that both types of seismometers exhibit favorable self-noise characteristics.In the same environmental condition,the coherence of data recorded by the two types of seismometers is high in the low frequency range(1-10 s),while differences in coherence are observed in the long period(10-100 s)and high frequency range(>1 Hz),which are significantly influenced by external factors.
Keywords：GL-CS120JS-120CorrelationSelf-noise
Publication Date：2024-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 55-65 )