For reference here, Mount St. Helens' 1980 blast was ~25 MT over the whole of the eruption, about half of Tsar Bomba. The initial blast was ~7 MT, a bit less th

For reference here, Mount St. Helens' 1980 blast was ~25 MT over the whole of the eruption, about half of Tsar Bomba. The initial blast was ~7 MT, a bit less than a W-53 Titan. That initial blast put a cubic mile of rock into the air, up to 15 miles high for some of it, and all over the continent. If you put these numbers into the map, be sure to use the 'surface blast' option, not the 'air blast'. https://en.wikipedia.org/wiki/1980_eruption_of_Mount_St._Helens#Aftermath https://en.wikipedia.org/wiki/1980_eruption_of_Mount_St._Hel...