Mr Oppenheimer said: Well, there are a lot of potential scenarios for a future eruption at the Yellowstone volcano. The one that people get excited about and keen on is the chance of a colossal eruption, what we might call a super eruption but that is a very rare event. The probability of that is exceedingly low probably less than 1 in a million per year. But what is more likely are smaller events as there are a whole range of things volcanos can do.
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Yellowstone volcano colossal eruption not biggest worry as US warned of forgotten danger (Image: GETTY)