Abstract Aiming at the anomaly of annual variation in time series data, we construct an information extraction process based on the S-transform method. The evolution process of the background annual variation signal(ANA) can also be analyzed in addition to the extraction of conventional short-period annual variation signal(ONA). Based on the bidirectional asymmetric threshold strategy, combined with the R value score and Molchan diagram, we construct a quantitative method for forecasting index determination and performance evaluation. The application results of the NS component of horizontal pendulum tiltmeter in the Korla station, Xinjiang, show that the ANA has better forecasting performance for M≥6 earthquakes within 250 km around the station, and the ONA is relatively better for M≥5 earthquakes within 200 km.
LIU Qi,ZHANG Jing. Research on the Extraction of Annual Variation Information of Time Series Data and the Evaluation Method of Earthquake Forecasting Index[J]. jgg, 2023, 43(1): 95-99.
LIU Qi,ZHANG Jing. Research on the Extraction of Annual Variation Information of Time Series Data and the Evaluation Method of Earthquake Forecasting Index[J]. jgg, 2023, 43(1): 95-99.
