Lake Taupō was formed by the massive Ōruanui eruption, about 26,500 years ago. This threw out 1,000 times more pumice and ash than Mt St Helens (United States) did in 1980. The latest Taupō eruption, at about 200 AD, was much smaller than Ōruanui. Even so, it was several times larger than the eruption of Krakatau (Krakatoa) in Indonesia in 1883.
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