View to the north-northeast. The fastest water wave to radiate away from the eruption is being pushed by an atmospheric wave triggered by the explosion. The water wave grows bigger (amplification) over the deep Tonga Trench, then decouples from the atmospheric wave on the east side of the trench, creating a series of new, decoupled waves. Together, the coupled and decoupled waves constitute a meteotsunami. Far behind them, the “classic” tsunami is produced by seafloor changes displacing a large volume of water during the eruption. Read the News Article for details.