Thammaboribal, P., N.K. Tripathi, and S. Lipiloet. “Pre-Seismic Signature Detection Using Diurnal GPS-TEC and Kriging Interpolation Maps (ASK-VTEC Technique): 11 May 2011, M9.0 Tohoku Earthquake Case Study”. International Journal of Geoinformatics 20, no. 11 (November 28, 2024): 148–161. Accessed May 21, 2026. https://ijg.journals.publicknowledgeproject.org/index.php/journal/article/view/3715.