[PIF]

Scale :

Note Mt St Helens in 1980 down in lower left corner at 0.25 CK{cubic kilometers} (VEI=5 each step in the scale representing an explosivity increase of 10X) and Pinatubo in 1991 at 5 CK (VEI=7).

Long Valley 580 CK of dense rock last major eruption - small as super volcanoes go. Ash thickness at 16 kilometers = at least several meters.

Wah Wah Springs, Utah - 30,000,000 years ago 5,500 CK at estimated VEI of 8

[KamperKen]

I saw a list of super volcano eruptions and the most recent one was Taupo in New Zealand around 23,000 years ago.

[rdl6989]

Good info.

[rfp1234]

A big one would reverse “climate change” very rapidly, and likely cause a new ice age.