Board Thread:Questions and Answers/@comment-6104247-20130430210408/@comment-32656-20130501083537

Evidence points to Toba having not had remotely that effect. Its effects have been overstated for years.

Supervolcanoes don't have quite the range you think - Toba, for instance, only spread Ash for a few thousand kilometers. Ash would also not be as bad.

Global Hunger? Yes. But only because of the American "breadbasket" being knocked out of commission.

Yellowstone goes up, maybe half the continent gets ash. Won't be too horrible in much of that range.