Meteotsunami Observed in Japan Following the Hunga Tonga Eruption in 2022 Investigated Using a One-Dimensional Shallow-Water Model
Shion Sekizawa, Tsubasa Kohyama
Abstract
On January 15, 2022, the volcano Hunga Tonga about 8000-km away from Japan explosively erupted. Following the eruption, tsunami-like sea-level fluctuations were observed in Japan, much earlier than expected based on the oceanic long-wave propagation from Tonga. By contrast, atmospheric pressure disturbance presumably due to the eruption was also observed about 30 minutes before the sea-level change. Therefore, the observed sea-level fluctuations can be considered as meteotsunamis forced by the pressure perturbation rather than tectonically forced by the eruption, but the mechanism is not yet fully understood.
Topics & Concepts
GeologyClimatologySea levelPerturbation (astronomy)VolcanoAtmospheric pressureSeismologyWater levelAtmospheric sciencesOceanographyGeographyQuantum mechanicsPhysicsCartographyearthquake and tectonic studiesSeismology and Earthquake StudiesTropical and Extratropical Cyclones Research