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  Extreme space weather events triggered by Tonga volcano eruption during geomagnetically disturbed conditions

Rajesh, P. K., Charles, L., Jia-Ting, L., Chen, S.-P., Lin, C.-Y., Liu, J.-Y., Chou, M. Y., Yue, J. (2023): Extreme space weather events triggered by Tonga volcano eruption during geomagnetically disturbed conditions, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4051

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021491 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021491_1
Genre: Conference Paper

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 Creators:
Rajesh, P. K.1, Author
Charles, Lin1, Author
Jia-Ting, Lin1, Author
Chen, Shih-Ping1, Author
Lin, Chi-Yen1, Author
Liu, Jann-Yenq1, Author
Chou, Ming Yan1, Author
Yue, Jia1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: The Tonga volcano eruption on 15 January 2022, during the recovery phase of a moderate geomagnetic storm, triggered extreme plasma bubble (EPB) activity across the globe. This study examines this rare space weather event triggered by a volcano eruption by using ground-based Global Navigation Satellite System (GNSS) total electron content (TEC) measurements, and in situ ion density observations by ion velocity meter (IVM) onboard the FORMOSAT-7/COSMIC-2 (F7/C2) satellites. Though EPBs occurred over a wide range of longitudes, the IVM and rate of TEC index (ROTI) observations over the Asia-Pacific region (100-150°E) revealed super plasma bubbles, expanding to geomagnetic latitudes beyond 30°, attaining apex altitudes over 3000 km. This was preceded by an unusually strong pre-reversal enhancement (PRE) revealed by the global ionosphere specification (GIS) electron density profiles constructed by using the F7/C2 radio occultation (RO) and ground based GNSS slant TECs. The GIS further revealed sharp decrease of equatorial ionization anomaly (EIA) crest density due to the storm impact. The combined effects of the enhanced F-region wind over EIA by the negative storm and the perturbations induced by the volcano eruption intensified the PRE, elevating the F-peak to altitudes above 450 km. This provided suitable conditions for super plasma bubbles over the Asia-Pacific region, where the Lamb wave induced perturbations over the equator overlapped with the period of intense PRE. Over further western longitudes, the arrival of Lamb wave progressively lagged the terminator, resulting in less intense EPB activity, with much weaker or no EPBs over the Euro-African region.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-4051
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -