15. North America, An Unlikely Candidate
In 2015, more investigations regarding a sizable eruption most likely occurring in 535 or 536 considered a volcano in North America to be a reasonable contender.
The volcano is also said to have shown signs of emitting a second eruption between 539 and 540. The effects of the first eruption were impactful enough to sustain the cool weather till 550 CE.
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