This guy is like the global warming alarmists. Doom and gloom. The worst is def gonna happen about a mechanism that we have poor understanding of.

There are numbers all over this sort of event based on several dozen studies. He thinks the magnetic poles eill just peter out by 2050 and we'll be exposed to hard radiation all the time enough that 'electricity won't work'. News flash, we used hardened electronics for many, many things. Including being in space, with electrical devices.

Others think each shift takes 7000 years from start to finish - in which case we have about 6000 years to go before the shift actually happens and we are just seeing a somewhat weaker field at the moment.