The Russians are not scared to get wild and crazy. Vault-Co likes.
I'm not sure how much of this is correct and what is the result of exaggeration to make their point.
I can tell you there is no evidence the atmosphere vanishes in a magnetic pole shift. None at all. They just made that up.
There is quite a bit of fossil evidence that seems to be a layer deposited by a massive death due to naked cosmic radiation around the time of a magnetic shift. Three feet of shielding and a stout 90 degree turn should pull you right through that.