Is it possible that the earth's magnetic field will be lost? Is it possible to turn back the earth's magnetic?

Answer 1

If the earth's mantle & core has cooled sufficiently to become more or less solid, then the magnetic field will be lost. This would be a gradual process, not like in the movies where the core suddenly stops. I don't think there's technology to re-animate the core. Hopefully, by the time it happens, humans would now have been a galactic civilization, and able to leave earth for another home.

Scientists think that it happened to Mars, so it's possible that it could happen to earth.

Answer 2

In the foreseeable it will not be lost permanently. However, several times in the earth's history it has changed polarity, and when this happens it can be essentially 0 for some time. From the article http://www.spaceref.com/news/viewpr.html?pid=5834 :

"Our protective shield is unlikely to fail permanently, but a temporary shutdown may be imminent. It could happen within as little as 2000 years. Measurements of the Earth's field show that it is getting weaker, and suggest that we are heading for a field reversal, in which the north and south magnetic poles will swap. When the reversal is in full swing, there will be a time when the field sinks almost to zero before cranking up again. This unprotected period might only last for a few years, or it could go on for thousands. To know for sure, we'll need a very precise model of the Earth's core."

Answer 3

A very interesting question.
At the outset, I can say we have no clear one line answer to this very basic question. Our understanding of the earth’s interior is very very little. The cause of earth’s magnetic field is not directly known. The outer liquid core in the earth’s interior is considered to be the main source of the most part of earths magnetic But, the question, how it produces the magnetic field is still a subject of conjectures. It has high temperatures above the curie point so presence of a magnetic core is not very convincing. Is the outer core made up of plasma and the convection within it creates a self exciting dynamo conditions producing varying currents which in turn produces the magnetic field, we really do not know it. The reversal of filed is very well documented as strip anomalies in the ocean floor, the wandering of poles is documented as well in the rocks spread across the globe. We do not know why the outer core is fluid or behaves like a fluid and the inner core is solid.
The earth’s magnetic field looks like an intrinsic property of earth and Man cannot control it, so question of bringing changes to it does not seem possible. It is a property like earth’s gravity which is due to it’s mass, as long as the mass exist, the gravity would exist. I think as long as the outer core remains in plasma state, the earth’s magnetic field would remain.
thnks
nk agarwal

Answer 4

X-rays and UV radiation emitted by solar flares can affect Earth's ionosphere and disrupt long-range radio communications. Eek! Power grids may cause blackouts, damage satellites, and disrupt GPS signals in severe cases. "The impacts could last through the weekend as well, but the storm is part of the sun's normal 11-year cycle of solar activity, which is supposed to reach peak storminess in 2013, before decreasing once again." This isn't unusual. In all honesty, damage will probably be minimal, if noticed at all. However I have no doubt that at some point within the sun or any star's history, there have been flares damaging orbiting planets

Answer 5

Magnetic polar reversals occur, on average, every 250,000 years or so. The last one was 700,000 years ago so the next is a little overdue. It will take a few thousand years to happen.

Answer 6

The poles switch though it takes years to do and im talking about many generations of a family years.

Answer 7

No it will not be lost, just reversed poles, as is happening right now. it takes about 100,000 years, for each turn.

Answer 8

no it won't be lost but if humans on't clean up their act earth will soon become impossable to live on