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Xu Weiwei. 2017: Self-noise tests on seismic dataloggers. Acta Seismologica Sinica, 39(5): 806-813. DOI: 10.11939/jass.2017.05.014
Citation: Xu Weiwei. 2017: Self-noise tests on seismic dataloggers. Acta Seismologica Sinica, 39(5): 806-813. DOI: 10.11939/jass.2017.05.014
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Self-noise tests on seismic dataloggers

  • 1.

    Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

  • 2.

    Key Laboratory of Seismic Observation and Geophysical Imaging, China Earthquake Administration, Beijing 100081, China

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  • Received Date: September 20, 2016
  • Revised Date: December 11, 2016
  • Published Date: August 31, 2017
    Graphical Abstract
    • Abstract
  • The self-noises of the seismic dataloggers have significant meaning for self-noise measurement of seismometers and dynamic range evaluation of broadband seimographs. In this study, we measured and analyzed the self-noises of six types of imported seismic dataloggers widely used in Chinese seismic observations based on multi-channel correlation analysis method. The results showed that self-noises of all six types of dataloggers are well below NLNM model when frequency domain is below 1 Hz in both high-gain and unity-gain modes by sensitivity conversion factor 750 V·s/m; however, for the frequency domain higher than 1 Hz, self-noises of the six types of dataloggers interlace with NLNM model, hence much care should be taken according to the goals of seismic observation. Reftek-130/130S and Q330HRS with high-gain sampling mode might be the preferable choice for the seismometer's self-noise measurements.
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