CEDAR
Coupling, Energetics and Dynamics of Atmospheric Regions Program
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Significant Ionospheric Plasma Depletions and Enhancements after the 2022 Tonga Volcano Eruption

Tien-Chi
Liu
Department of Space Science and Engineering, National Central University, Taiwan
Abstract text

This study examines the local ionospheric response to the January 15, 2022, Tonga volcanic eruption using the Global Ionosphere Map (GIM) and FORMOSAT-7/COSMIC-2. Results show that the total electron content (TEC) decreased by 5–10 TECu (50%) for 12 hours (0500–1600 UT) and subsequently increased by 2–18 TECu (50%) between 17 and 23 hours post-eruption (2100–0300 UT) within approximately 1650 km of the Tonga volcano location. The electron density profiles from FORMOSAT-7/COSMIC-2 indicate that the F2-layer peak density decreased by 8×10⁵ #/cm³ (74%) for 12–13 hours, yet increased by 1×10⁶ #/cm³ (84%) between 17 and 21 hours. Furthermore, numerical simulations using the Global Ionosphere-Thermosphere Model (GITM) are performed to investigate these ionospheric disturbances and provide additional insights into the observation.

Authors
Tien-Chi Liu, Department of Space Science and Engineering, National Central University, Taiwan
Po-Han Liao, Center for Astronautical Physics and Engineering, National Central University, Taiwan
Tiger JY Liu, Department of Space Science and Engineering, National Central University, Taiwan
Cissi YT Lin, Department of Space Science and Engineering, National Central University, Taiwan
Student in poster competition
Poster category
IRRI - Irregularities of Ionosphere or Atmosphere
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