Answer to Dictation 1
The volcano that erupted under the sea near Tonga in January set a record.
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Answer to Dictation 2
It was the biggest explosion ever recorded using modern instruments.
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Answer to Dictation 3
It was also the biggest to happen in the past 150 years.
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Answer to Dictation 4
But we've now got all these geo-physical recording systems.
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Answer to Dictation 5
Something that was really unmatched in the modern data.
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Answer to Dictation 6
Sent atmospheric shock waves and tsunami waves around the world.
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Answer to Dictation 7
It also caused sonic booms that people heard 10,000km away in Alaska.
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Answer to Dictation 8
Scientists in the UK reported the sudden disappearance of clouds.
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Answer to Dictation 9
Harrison said the atmosphere was a remarkably interconnected thing.
Go to Dictation 10
Answer to Dictation 10
NASA has said the volcano's effects also reached space.
See the record explosion lesson for the whole text.
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