Journal Article

FZJ-2023-01250

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Concentric Traveling Ionospheric Disturbances (CTIDs) Triggered by the 2022 Tonga Volcanic Eruption

Liu, L. (Corresponding author) ; Morton, Y. J. ; Cheng, P.-H. ; Amores, A. ; Wright, C. J. ; Hoffmann, L.FZJ*

2023
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/33948  doi:10.1029/2022JA030656

Abstract: This paper investigates concentric traveling ionospheric disturbances (CTIDs) associated with the Tonga volcanic eruption. Results show that: (a) two types of CTIDs (CTID #1 and CTID #2) were identified that traveled radially from Tonga at the speed of 610–880 m/s (acoustic-mode) and 300–380 m/s (Lamb-mode), respectively. CTID #1 reached 3,800 and 5,000 km away from the eruption location toward the directions of New Zealand and Australia, respectively. CTID #2 propagated persistently for ∼9 hr over New Zealand and Australia. (b) The CTID #2 wavefront changed after 08:35 UT over New Zealand, possibly due to a combination of factors including the anisotropic propagation of CTID #2, the regional geomagnetic declination, and westward-moving Lamb waves. (c) Topside total electron content (TEC) enhancement with a magnitude over two TECu was observed from COSMIC-2 measurements. The enhancement agrees with CTID #1 peak from nearby ground-based TEC observations and could be related to the upward propagation of the F layer’s CTID #1 signatures.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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