Analysis of ionospheric and geomagnetic fields changes in Thailand during the May 2024 geomagnetic storm

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dc.contributor.authorMyint, Lin M.M.
dc.contributor.authorPerwitasari, Septi
dc.contributor.authorNishioka, Michi
dc.contributor.authorSaito, Susumu
dc.contributor.authorKaewthongrach, Rungnapa
dc.contributor.authorSupnithi, Pornchai
dc.date.accessioned2026-08-06T10:53:16Z
dc.date.available2026-08-06T10:53:16Z
dc.date.issued2025-12-15
dc.description.abstractThe extreme geomagnetic storm of May 2024, the most severe in two decades of space weather history up to date, had widespread effects on the ionosphere, from the polar regions to the magnetic equator. This study examines the responses of the equatorial ionosphere and geomagnetic field over Thailand during this geomagnetic storm, utilizing data from GNSS receivers, magnetometers, and ionosondes near the magnetic equator and low-latitude regions of Thailand. We analyze the direct and indirect impacts of interplanetary magnetic field (IMF) and interplanetary electric field (IEF) variations, driven by solar storms, on local equatorial magnetic fields and ionospheric parameters. Our finding reveals that storm-driven electric fields, particularly prompt penetration electric fields (PPEF) and disturbance dynamo electric fields (DDEF), strongly influenced equatorial electric field (EEF), causing notable fluctuations in total electron content (TEC), critical frequency of F2 (foF2), and virtual height of F layer (h’F). The Pearson correlation analysis highlights the rapid coupling between interplanetary magnetic field (IMF) and local equatorial magnetic fields during geomagnetic storms. These observations enhance our understanding of geomagnetic storm impacts in equatorial regions, which is crucial for improving space weather forecasting and mitigation strategies, especially for GNSS-dependent systems and radio communications.
dc.identifier.citationAdvances in Space Research, 76(12), 7508-7520, 2025
dc.identifier.doi10.1016/j.asr.2025.01.071
dc.identifier.issn02731177
dc.identifier.other2-s2.0-85217956666
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17520
dc.sourceAdvances in Space Research
dc.subjectEquatorial ionization anomaly
dc.subjectEquatorial ionospheric irregularity
dc.subjectGeomagnetic field
dc.subjectGeomagnetic storm
dc.subjectIonosphere
dc.subjectSolar storm
dc.titleAnalysis of ionospheric and geomagnetic fields changes in Thailand during the May 2024 geomagnetic storm
dc.typeArticle

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