Ionospheric TEC anomalies analysis and prediction during six volcanic eruptions using a Hybrid ML-DL model and comparison with the AR/MLR Models - R. Mukesh; S. Logesh; Sarat C. Dass; G. Cynthia; M. Sudhandra; K. Sivaprabha; T. Annu Regha; S. Kiruthiga (PLoS ONE, 2026)