Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Geophysical research letters, 2022-08, Vol.49 (15), p.n/a

Ort / Verlag

Goddard Space Flight Center: American Geophysical Union (AGU)

Erscheinungsjahr

2022

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• 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.