MOVING AR SPECTRUM ANALYSIS AND EARTHQUAKE INFORMATION PROCESSING

The short-base levelling data at Zhangdaou is analysed by the moving AR spectrum analysis. There are some anomalous changes of AR spectrum parameters during the Tangshan earthquake. The period is about T = 30 days appearing from January 1975 till January 1977, meanwhile the optimum order of AR model fitting Pop6, the corresponding FPE value is high.