[CaptainCrunch]

Looking that the effects of larger volcanic erruptions, if Yellowstone lets go in the way they think, extinction level is maybe an understatement.

Mount Toba - Its erruption took 2 weeks, global temperatures reduced by 3 to 4 degrees C. there was mass devestation of plants and animals in SE Asia,

Mount Pinatubo 1991 - caused Global temperatures to drop .5 degrees C

Mt Tamburo 1815 - caused the year without summer, severe ash and SO2 emissions caused major crop damage around the world. The price of grain in Switzerland quadrupled for example.

Laki 1783 (iceland) - crops in Iceland were devastated and 60% of its livestock died. It caused a europeon famine going as far as Egypt, some have linked the effects of the volcano to the French Revolution due to famine.

Ilopango El Salvador 483 - in theory was a primary cause of the global cooling in 535 and lead to crop failures all the way to China.

So in terms of if a Super Volcano blew in the middle of the States. The US would be devastated, most of the central food production in terms of crops and live stock would end, probably wild animal population and plants would die out. besides being a massive explosion in the middle of the States most infrastructure and power generation would be wiped out and the secondary immediate effects would be spectacular in terms of loss of infrastructure, secondary death effects due to disease and famine. The ash and SO2 effects would be beyond comprehension. Global crop failures, probably at least a 5 or 6 degree drop in temperatures globally which most agree would pretty much end most of the life on earth. the explosion though in the central states would trigger massive tsunami's globally. The positive though I guess, would be Earth would be well fertilized for whatever life would evolve next.