What was the most dangerous Volcanic Eruption recorded in human history?
Here are the ‘top 3’. The last three volcanic eruptions to cause major loss of life were Krakatoa, Indonesia, where 32,000 were killed in 1883; Mt. Pelee, Martinique, where 29,000 were killed in 1902; and Nevada del Ruiz, Colombia, where 23,000 were killed in 1985. Fiery lava was not the culprit in any of these disasters. The ‘criteria’ for an eruption to be ‘dangerous’ is clearly described in the article I link in: Is there any risk for the population nearby.