And this little fire cracker was only a 6 (the Volcanic Explosivity Index (VEI) - St Helens was a VEI of 5. Each digit of increase is 10 times the previous.
1815 A.D. - Mount Tambora (VEI) = 7, (100x greater than Mt. St Helens)
1912 Novarupta, Mount Katmai, Alaska, VEI=6
1991 Pinatubo, Luzon, Philippines, VEI=6
Yellowstone would be a VEI of 10 or higher... or 100,000 times Mt St Helens ...
Yeah, if jellystone goes, probably an extinction level event. Good thing we got those rocket ships ready to blast off to Mars huh?