Quantitative Analysis of Borehole Strain Rainfall Disturbance Characteristics at Lingchuan Station,Shanxi
To determine earthquake precursor anomalies in a timely and effective manner and improve the role of four-component borehole strain observation data in earthquake short-term tracking,the borehole strain data at Lingchuan station was used as the ba-sis to systematically analyze the data and extract rainfall events,and the observed deformation value and deformation amplitude were used for correlation analysis with rainfall respectively.The results with high correlation coefficient were selected to establish a re-gression model to quantitatively analyze the influence of rainfall on the observed data.The results show that the correlation coeffi-cient between the deformation amplitude and rainfall is higher,and the highest degree of fitting is a cubic function of one yuan.When the precipitation of the four components of Lingchuan is about 10 mm or more,the dependent variable changes correspondingly,and when the cumulative value of rainfall is about 40 mm,the observed value tends to be stable and no longer affected.The research re-sults accumulate experience for the quantitative analysis of rainfall interference.
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万方数据
