日本地球惑星科学連合2025年大会

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[E] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

2025年5月25日(日) 17:15 〜 19:15 ポスター会場 (幕張メッセ国際展示場 7・8ホール)

コンビーナ:細川 敬祐(電気通信大学大学院情報理工学研究科)、Liu Huixin(九州大学理学研究院地球惑星科学専攻 九州大学宙空環境研究センター)、大塚 雄一(名古屋大学宇宙地球環境研究所)、Chang Loren(Institute of Space Science, National Central University)

17:15 〜 19:15

[PEM12-P34] Analysis of Earthquake-Induced Ionospheric Plasma Disturbances: A Case Study of the 2024 Hualien Earthquake, Taiwan

*陳 佳宏1、Wang Yung-Ming1、Lee I-Te2 (1.台湾国立成功大学地球科学学科、2.Taiwan Space Agency)

キーワード：花蓮地震、FORMOSAT-7/COSMIC-2衛星、GNSS全電子数、地震電離層現象

This study analyzes ionospheric disturbances triggered by the 2024 Hualien earthquake in Taiwan. By integrating Total Electron Content (TEC) observations from ground-based Global Navigation Satellite System (GNSS) networks with radio occultation data from the FORMOSAT-7/COSMIC-2 satellite, this research provides new insights into seismo-ionospheric phenomena. A key finding is the first-time observation in Taiwan of a concentric circular disturbance structure in the ionosphere following an earthquake, which is similar to the disturbances observed after the 2011 Tohoku earthquake in Japan. Furthermore, the study calculated the propagation speeds of the disturbance waves, suggesting that their propagation characteristics may be influenced by geomagnetic effects. The results of this study contribute to a better understanding of the coupling mechanisms between earthquakes and the ionosphere.