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EARTHQUAKE ›› 2011, Vol. 31 ›› Issue (2): 87-96.

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Quality Evaluation and Fitting Analysis of 4-component Borehole Strainmeter Data

LIU Qi1, ZHANG Jing1, CHI Shun-liang2   

  1. 1. Institute of Earthquake Science, CEA, Beijing 100036, China;
    2. Earthquake Administration of Hebi city, Hebi 458000, China
  • Received:2010-08-04 Revised:2010-11-26 Online:2011-04-30 Published:2021-09-09

Abstract: Based on data observed by YRY-4 4-component borehole strainmeters installed during the tenth five-year project of China, this paper makes a brief analysis of how atmospheric pressure, water level, and observation data are interrelated, and introduces some typical features of influences caused by water level interference. After the initial valuation of the data, we conduct a more thorough valuation on quality of the observed data by means of self-checking function specific to 4-component observation. According to the analysis of data reliability, we focus on the distribution of response ratio, barometric coefficient, coefficient of water level and such inverse parameters, which are calculated by fitting data from highly-reliable observing stations using the comprehensive fitting model, during the period of equipment stability. This can provide a background reference for future analysis.

Key words: 4-component borehole strainmeter, Data evaluation, Comprehensive fitting, Environmental interference

CLC Number: