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The near- and far-field tsunami simulated by the 2022 Hunga Tonga Hunga Ha'pai explosion

Authors

Pakoksung,  Kwanchai
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

suppasri,  anawat
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Imamura,  Fumihiko
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Pakoksung, K., suppasri, a., Imamura, F. (2023): The near- and far-field tsunami simulated by the 2022 Hunga Tonga Hunga Ha'pai explosion, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0039


Cite as: https://gfzpublic.gfz.de/pubman/item/item_5017056
Abstract
On 15 January 2022 at 4:15 UTC Hunga Tonga Hunga Ha’apai submarine volcano was exposed and its explosion generated a tsunami as a unique global disaster in the Pacific Ocean. This study pointed to near- and far-fileld tsunami simulation, based on Numerical modeling. We estimated submarine explosion geometries result in a suitable explosion magnitude of approximately 25 megatons of trinitrotoluene (Mt) to determine with the waveform from the tide gauge. We estimated the maximum initial air pressure from the submarine explosion was assumed to be approximately 50 hPa with the 25 Mt. Using the nonlinear wave model, the calculated initial air pressure was used to simulate tsunamis.