Ping
I always thought that Krakatoa was the biggest one.
>>The cataclysm blasted 10 cubic miles (40 cubic kilometers) of debris up to 27 miles (43 kilometers) high into the sky, producing fallout that settled around the world.<<
It is hard to even imagine something that huge. If Krakatoa=200Mt then this would have been 1600Mt or more — 500 H bombs.
Probably could be heard halfway around the world (assuming Krakatoa was heard 3,000 miles away).
And Yosemite will dwarf them all.
And all because people in the 1200s would not stop using their cars to get to work.
Tracks with the beginning of the little ice age.