Earth's Mag Field Could Flip

[AntennaGuy]

So, according to this article, the Earth's magnetic field flipped relatively recently (on a geological time-scale, that is) and it might be headed that way again: https://www.space.com/earth-magnetic-fl ... -years-ago . This is supposed to be bad (but not dinosaur-level bad).

So... I did a quick back-of-the-envelope calculation of how much current (and how much copper, and how much power) we would need to drive a wire loop wrapped around the whole planet, to force the Earth's magnetic field back to ~normal. Dude! You don't want to see those kind of numbers. And... let's just put it this way: we probably won't be ready to do that this century. But in 2 or 3 hundred more years (assuming technology advancements comparable to the last 200-300 years)!, then... maybe! But it might be cheaper to simply retire to our vast underground cities instead.

[Ylem]

So, according to this article, the Earth's magnetic field flipped relatively recently (on a geological time-scale, that is) and it might be headed that way again: https://www.space.com/earth-magnetic-fl ... -years-ago . This is supposed to be bad (but not dinosaur-level bad).

So... I did a quick back-of-the-envelope calculation of how much current (and how much copper, and how much power) we would need to drive a wire loop wrapped around the whole planet, to force the Earth's magnetic field back to ~normal. Dude! You don't want to see those kind of numbers. And... let's just put it this way: we probably won't be ready to do that this century. But in 2 or 3 hundred more years (assuming technology advancements comparable to the last 200-300 years)!, then... maybe! But it might be cheaper to simply retire to our vast underground cities instead.

I can see this big 'ole copper loop now

I have enough problems trying to receive longwave signals now
Thanks for the laugh

[Chich]

Does not look like it would be a good thing for people who enjoy cat videos on their phones.