Of all the super volcanoes, the Yellowstone super volcano will cause the most economic damage because it will wipe out all of the US Midwest.
The rest include - Naples Campi Flegeri complex
- Macauley Island located halfway between New Zealand and Tonga
-Toba and Tambora in Indonesia
-Baekdu Mountain on the border of North Korea and China
-Kurile Lake and Karymshina, Russia
Pastos Grandes Caldera, Bolivia.
The last to erupt with a VEI eruption was Taupo 28,800 years ago. Ash particles from that was found in Antarctica ice cores. Taupo is about 2800 miles north of the ice. Great trout fishing there now if you are so inclined.
Very interesting list. New Zealand and Indonesia certainly have a (violent) knack for launching themselves to the Moon on top of giganormous volcanic tantrums.
We really only have one, because the Macauley Volcano is in international waters well outside our continental margin. Indonesia certainly has some bad luck in that department
Source: http://geological-library.blogspot.com/2014/07/indonesia-in-order-tectonic-world-grace_28.html
There's plenty of subduction happening within the region and that creates a lot of magma.
Source: https://upload.wikimedia.org/wikipedia/commons/2/22/Earth's_Inner_Layers_denoting_the_LAB.png
The diagram above shows an idealised view of an oceanic basaltic volcano but the principle is the same regardless of where abouts on the surface a volcano is located.
Source: https://www.geologyin.com/2018/04/scientists-decipher-magma-bodies-under.html
However from what I understand a super volcano occurs where there is a very large magma upwelling from the upper mantle that makes its way through a thin part of the crust into one or more huge magma chambers. These are mantle plumes, are in a fixed location and these are known as hotspots. This is illustrated in the diagram above which is of the Yellowstone hotspot
However when we look at volcanoes on the surface, we see that over geologic time they move. This is because of plate tectonics and as the plates move they move over the hotspots. This can best be seen in volcanic island chains such as Hawaii, or Indonesia itself. Even in North America the large hotspot can be tracked across the current surface.
Hopefully that and the diagrams helps explain it
It often amaze me Tambora and Krakatoa martyrized the same (very unfortunate) corner of the world only 68 years apart.
In passing, why isn't Krakatoa on the list ? did it destroyed itself into oblivion in 1883 ?
Krakatoa isn't a super volcano because its magma chamber isn't huge enough.