Hey, I can make up figures on the fly as well. I can say the magnetic flip is a million years away despite the fact that all signs are pointing to a possible flip in 2012 at the peak of the solar maximum. The funny thing is that I'm only a layman and even I know that if the magnetic poles shift 400 miles in a single year suddenly for no reason, you are looking at a very unstable system on the verge of rapid change.
Don't worry, though, a magical mystery computer simulation was produced to placate the sheeple which demonstrated that the magnetic field in reality serves no purpose at all and that even if it does vanish for a couple of months/years, we'll all still be shielded by something called "solar backflux" which apparently is a term invented by the same people who produced the reassuring computer simulation.
Good thing our ancestors were all wrong from 1910-1996 about the magnetic shield being the only thing standing between us and naked cosmic radiation pouring onto the bare face of the planet with thousands of rads an hour sufficient to literally cook people in their own skins like tamales. Nothing better to keep the herd docile like a hastily slapped together "computer simulation."
Otherwise a person might go absolutely batsh*t and start digging an underground vault.
Is "back-of-the-envelope" kind of like "low key wishful thinking and neurotic avoidance?"
"Right now, historic records show that the strength of the magnetic field is declining very rapidly. From a quick back-of-the-envelope prediction, in 1,500 years the field will be as weak as it's ever been and we could go into a state of polarity reversal," says Singer.