Of all the potential natural disasters that I find frightening, super volcanoes are at the top of my list because they have the potential to wreak havoc on a global scale.
Our Earth’s magnetic field is wandering rapidly and decreasing in strength, there are minor poles forming. These are all things that have happened during magnetic field reversals in the past, and, while they tell us these things take a very long time, the last one, about 12,000 years ago, happened in only about 400 years.
Another thing that happened was a super-volcano eruption which devastated much of Southern Europe. But such eruptions don’t just affect the area of ash and lava deposits, they put so much material in the atmosphere as to cause a global cooling and reduction in plant production that would likely lead to mass starvation if it happened today.
I think there are folks in the know that know a lot more about this than they are telling us for fear of mass panic.