The eruption was a 24 Megaton release of energy equivalent to 1600 of the bombs dropped on Hiroshima.
It was a class 5 on the Volcanic explosivity Index. To put that in perspective, in our life time we've only seen one bigger which was Krakatoain 1883 and Pinatua in 1993, and those were class 6
There was a class 7 eruption about 200 years ago. We haven't seen a class 8 eruption in modern history.
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My name is Ozymandias, King of Kings;
Look on my Works, ye Mighty, and despair!
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