TEC Anomalies Detection for Qinghai and Yunnan Earthquakes on 21 May 2021

Earthquake prediction by using total electron content is a commonly used seismic research method. The long short-term memory model kind of method to predict time series and has been for the content, relative power spectrum one pre-seismic infrared anomaly detection algorithms in frequency domain. In this paper, new combining these two extract abnormal signals; thus scientists can more easily detect anomalies similar those before Qinghai Yunnan earthquakes happened on 21 May 2021. There are with high-value near epicenters. To validate correlation between statistically, spatiotemporal characteristics TEC analyzed based connected region recognition. Then, proportion earthquake-related (the rate), outside predicted range miss ratio within occupancy anomalies, which called probability gain, were assess appropriate parameters algorithm rate below 50% searched. highest gain 1.91, means may decrease uncertainty earthquake prediction.