Analysis of Ionospheric Perturbations during the Significant Earthquake using GNSS Data

Natural disasters like earthquakes are most unpredictable and unstoppable. Precise signatures are recognized in Total Electron Content (TEC) before the occurrence of the earthquake. Observations along with analysis of such signatures will benefit the authentic detection and forecast of the earthquakes before their occurrence. In this paper, the Earthquake which occurred at Calatagan, Philippines, on 24-12-2020 is considered. The locality of the Philippines is an Global Navigation Satellite System (GNSS) station named PIMO at Manila. A study and investigation is carried out on the Slant Total Electron Content (STEC) data for two days before the Earthquake.