I'm telling you Spiff that if Earth's magnetic feild goes away Electronics not working will be the least of Earths problems. Solar winds and UV light will fry the Earth. Unless any living plant or animal can adapt to these new amounts of radiation, that are normally blocked, in 50 years nothing will survive. Maybe deep sea creatures, some bacterias, and those of us lucky enoff to get into fall out shelters would survive. Thankfully, It takes several millions of years for the Earth's core (what creates the magnetic feild) to completely flip over switching North and South. So half off that is when the magnetic feild will dispurse. I think we're safe.