Lin J-W. Karhunen–Loève Transform for Detecting Ionospheric Total Electron Content (TEC) Anomalies Prior to the 1999 Chi-Chi Earthquake, Taiwan. JSE [Internet]. 2011Apr.5 [cited 2024Apr.18];25(1). Available from: https://journalofscientificexploration.org/index.php/jse/article/view/182