Eh? The latter two are nominally true. They could happen whenever, but so far haven't. The former two will definitely happen we just don't know the time scale.
Yellowstone is on a timer that we don't have access to, and there are projects to drill down into it and deplete the heat, giving us electricity and solving the problem.
With respect to the magnetic pole, this is something that is actually happening.
Observe
Is it not true? If it is true then it seems like a good idea to let people know, I myself didn't know about this phenomenon before and feel better informed.
If it's not true, or the danger is being far overblown then speak up here and let us know.
It's a plug for the book the essay is from. It barely introduces the subject. The book might be interesting and explore all of this stuff in depth, but excerpting a section like this is poor form. It's on a website so it shouldn't be a space issue. If your going to advertise your book like this, the reader should get something out of it.
"yellowstone will blow up and cripple western civilization"
"a solar storm will blow up our nation's telecommunications infrastructure"
"a super-flu will kill 30% of americans"