i.e. when will the iron inside the earth stop creating this magnetic field
2006-10-26 09:56:56 · 10 answers · asked by ustaadji 2 in Science & Mathematics ➔ Earth Sciences & Geology
As long as the molten core rotates at a different rate than the crust.
2006-10-26 09:59:10 · answer #1 · answered by Anonymous · 1⤊ 2⤋
Once they've swapped, not much, except for maybe some confused animal navigation and a lot of mislabelled compasses. It's the transition that's the problem. A swap doesn't just mean the North and South poles swing around to their opposite sides. The magnetic field actually inverts, collapsing in intensity down to zero, then regenerating as the opposite pole. During the "zero" part, Earth's electro-magnetic shield is gone and there's nothing to deflect the charged solar radiation. If it lasts for an hour or two, that's probably okay. But if the process takes a few years or more, we'd be in serious trouble. And since we don't know quite how it happens, we don't know how long it takes.
2016-05-21 22:59:34 · answer #2 · answered by Betsy 4 · 0⤊ 0⤋
As to the above, reversal of the magnetic field is normal. It does not end the magnetic field, merely flips the polarity. Geological evidence suggests pretty conclusively that this has happened many times before.
As to your question about stopping, it will stop when the geodyanamo in the core stops. When that will happen, no one knows, because their are no good models of the Earth's deep interior, and it is very hard to get any information regarding it.
2006-10-26 11:13:41 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Well, it will last until the outer core is too cold to rotate as a liquid. The best evidence for this is Mars. Mars is half the size, so it had less heat and cooled quicker. It's field is long gone.
We don't have any good estimates as to when this will happen.
2006-10-26 10:16:13 · answer #4 · answered by QFL 24-7 6 · 1⤊ 0⤋
As long as the core is molten. Venus still has a molten core but doesn't have much of a magnetic field because it rotates so slow.
2006-10-26 10:27:52 · answer #5 · answered by Nomadd 7 · 0⤊ 0⤋
Thats true about the reversal of the magnetic field, it has happened many times before and will happen many times in the future, it doesnt have profound effects on us, at least when considering health and safety.
2006-10-26 12:41:03 · answer #6 · answered by Nick G 2 · 0⤊ 1⤋
According to what I read anywhere from 5000 to 50,000,000 years.
2006-10-26 10:44:35 · answer #7 · answered by golden rider 6 · 0⤊ 1⤋
till the whole planet is destroyed.......... maybe after it falls into the sun
2006-10-26 10:06:32 · answer #8 · answered by ? 6 · 0⤊ 1⤋
nobody knows
2006-10-26 14:52:07 · answer #9 · answered by bprice215 5 · 0⤊ 1⤋
For as long as earth does!!!!!!!!!!!!!!!!
2006-10-26 10:04:20 · answer #10 · answered by Anonymous · 0⤊ 1⤋