I see Krakatoa on the map. I read many stories about that cataclysm when I was a kid.
In recent geological time, Krakatoa was quite an event.
My reference to the TOBA volcano in #35 while a very old(75,000 years ago) eruption, many that dabble in this sort of thing believe Toba made life all but extinct on the planet. Some estimates, using mitochondrial DNA etc, have the human population at roughly the same time as only a few thousand hardy souls. There are a number of these "supervolcanos" around the planet. If any one of 'em were to blow, fugitaboutit.
FGS