PCA-Based Analysis of Key Influencing Factors on Extremely Low-Frequency Geoelectric Field Intensity

In view of the complexity of influencing factors in the artificial geoelectric field at the same test point over different times, it is difficult to extract effective environmental parameters for field strength prediction. Principal component analysis is used to analyze environmental parameters such as temperature, humidity, PH, conductivity and formation resistance. Through load analysis, the influence of different environmental parameters on geoelectric field is found as follows: Formation resistance > conductivity >PH > humidity > temperature. The effectiveness of the method is evidenced by the test results.