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The Tonga volcano that erupted in January set a
. It was the biggest
ever recorded using modern technology. It was also the biggest in the
150 years. Scientists say it may have been as
as the 1883 Krakatoa
. A researcher said: "Tonga was a truly global
....But we've now got all
geo-physical [recording]
, and they recorded
that was really [unmatched] in the modern
."