Reliability Analysis of Strain Observation Data of the YRY-4 Borehole in Sichuan region
Based on analyzing the interference factors of the borehole strain observation data,we found that the strain of YRY-4 type boreholes in Sichuan region was significantly affected by seasonal rainfall,borehole water level,and river water level fluctuations.The self-consistency test of the borehole strain was used to self-check the observation data of the borehole strain gauges.We found that all the strain correction correlation coefficients at each station were greater than 0.9 indicating that the overall quality of the YRY-4 strain observation data in Sichuan region is high,which can be used for regional earthquake prediction and seismic science research.