I think it is relevant to understand whether "being outside in ash cloud" leads to more or less instant death (1 day - 4 weeks as is typical with acute radiatio

I think it is relevant to understand whether "being outside in ash cloud" leads to more or less instant death (1 day - 4 weeks as is typical with acute radiation syndrome) as my interpretation of the original post implied. Or cancer 10 years down the road (unless you die of a car accident before that, or are treated with modern transplant/chemo therapies)