TY  - JOUR
AU  - Liu, Lei
AU  - Morton, Y. Jade
AU  - Cheng, Pin-Hsuan
AU  - Amores, Angel
AU  - Wright, Corwin J.
AU  - Hoffmann, Lars
TI  - Concentric Traveling Ionospheric Disturbances (CTIDs) Triggered by the 2022 Tonga Volcanic Eruption
JO  - JGR / Space physics
VL  - 128
IS  - 2
SN  - 0148-0227
CY  - Hoboken, NJ
PB  - Wiley
M1  - FZJ-2023-01250
SP  - e2022JA030656
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000949132200001
DO  - DOI:10.1029/2022JA030656
UR  - https://juser.fz-juelich.de/record/1002268
ER  -