Extreme Poleward Expanding Super Plasma Bubbles Over Asia-Pacific Region Triggered by Tonga Volcano Eruption During the Recovery-Phase of Geomagnetic Storm

P. K. Rajesh, C. C.H. Lin, J. T. Lin, C. Y. Lin, J. Y. Liu, T. Matsuo, C. Y. Huang, M. Y. Chou, J. Yue, M. Nishioka, H. Jin, J. M. Choi, S. P. Chen, Marty Chou, H. F. Tsai

研究成果: 雜誌貢獻期刊論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

The Tonga volcano eruption of 15 January 2022 unleashed a variety of atmospheric perturbations, coinciding with the recovery-phase of a geomagnetic storm. The ensuing thermospheric variations created rare display of extreme poleward-expanding conjugate plasma bubbles seen in the rate of total electron content index over 100–150°E, reaching ∼40°N geographic latitude. This is associated with fluctuations in FORMOSAT-7/COSMIC-2 (F7/C2) ion-density measurements and spread-F in ionograms. Preceding to this, an unusually strong pre-reversal enhancement (PRE) occurred in the global ionospheric specification (GIS) electron density profiles derived from F7/C2 observations. The GIS also revealed a decrease of equatorial ionization anomaly (EIA) crest density due to the storm impact. Reduced E-region conductivity by volcano-induced waves and enhanced F-region wind, further accelerated by reduced ion-drag over the EIA, apparently intensified the PRE. Accompanied with the strong PRE, volcano-induced seed perturbations triggered the super plasma bubble activity.

原文???core.languages.en_GB???
文章編號e2022GL099798
期刊Geophysical Research Letters
49
發行號15
DOIs
出版狀態已出版 - 16 8月 2022

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