For the past 4 or so years I'd been seeing posts about a micronova on /pol/ and completely ignoring them, (I barely use 4chan anymore) but recently saw a podcast that pretty much covered all of what it's about, but I'll give an even more concise rundown of what they claim is happening; The Earth's magnetosphere has been weakening for decades at an exponential rate as the magnetic poles drift, and some time around 2046 not only will the magnetic poles change, we'll experience a brief period where the Earth effectively won't have a magnetosphere at all, so almost everything above ground will probably be irradiated to death, and the physical rotation of the Earth might change along with it, making the Indian ocean the new north pole & the new south pole near Peru. The 90 degree physical change in rotation will happen in about a day, so you'd be able to feel it a little, but the giant tsunamis it creates will destroy basically everything that's not at a high altitude & there'll be tornado-speed winds. (he estimates that if your distance above sea level in feet & distance from the coasts in miles add to over 5000, you'd be safe from the flooding) Those alone are easy enough to survive, but the weakening magnetosphere isn't just space radiation, (which may be a big part of the increasing cancer rates) the slightest solar activity without the magnetosphere will be like a gigantic a Carrington Event that gets increasingly more probable over the next 20 years. And this time not only would you get shocks from doorknobs, and some telegraph poles burning-down, but they say anything metal will pretty much be induction-heated to the point of melting, even if hidden deep underground. So unless a deep underground bunker also has good magnetic shielding, everything inside of it will be fried. And once that's all over, it's another ice age above ground.
While some anarcho-primitivists salivate over the idea of the world resetting back to a pre-industrial or pre-agricultural world, the people that retain the most advanced technology have the advantage over those with stone knives and bearskins, but a man with a fully-functional robowaifu is king. And while the idea of the total collapse of civilization is appealing enough to make me consider living another 20 years, unless we get rescued by aliens, it just sounds like a cruel waifuless future even if you survive.