Question about magnetic field?

Question

What will happen when the magnetic field is gone? what well the earth look like? Won't anstroinds and other gases hit the earth and we will just be another planet with no life?
But they are saying the magnetic field will come back but I don't get what happened once it did lose its magentic preasure.

Answer 1

What earth's magnetic field does for earth is to deflect charged particles toward the poles (where, in the northern hemisphere, we see the aurora borealis, and in the southern hemisphere the aurora australis). It provides no protection from collision by planetary bodies. If it were ever to disappear the main effect would probably be a greater incidence of charged particle effects, such as solar storms, in nonpolar regions during times of high solar flare activity (see ref.).

Answer 2

Earth's magnetic field has flipped many times - this is recorded in the geologic record. Right now it appears the field is getting weaker, on its way to another flip (but not in our lifetimes). The magnetic field won't completely disappear when it flips - it will be very jumbled up for a while, though, kinda like many mini magnetic fields all over Earth. So Earth won't be completely exposed to the solar wind and coronal mass ejections. And we know life has survived just fine through previous field reversals (I don't know of any mass extinctions linked with magnetic field reversals).

Answer 3

Hi there;
Unless the Earth's inner core stops spinning (doubtful) there will not be a loss of our planet's magnetic field. That spinning iron/nickel core is what causes the magnetic fields which protect our atmosphere from being blown away by the Suns solar wind.
However, should our planet loose its magnetic field then most assuredly we would loose our water and atmosphere.
As for asteroids and other foreign astronomical objects, the magnetic field has never deterred them from a direct hit before so not having one is moot. The Earth has been hit before by astronomical objects and will be hit again. What determines the amount of damage from a hit is the trajectory, velocity and mass of the object. Most of the time the object will burn up in the atmosphere. :)
As for no life, without water and an atmosphere, life as we know it will cease to exist. :(

Answer 4

The magnetic field won't actually stop (I hope not, anyway) but instead will slow down, and reverse itself; according to old artifacts and pottery (might be Maya times), the iron lines in the potter were drawn south, instead of north, indicating that the north and south poles at one time use to be reversed!
I don't know what will happen when it begins to reverse, but apparently we're heading in that direction now, and the magnetic field is slowing down, disrupting weather, and even slowing our energy down. Have you been feeling low on energy? No wonder energy boosting drinks like Tab and Rev are flooding the markets.

Answer 5

It won't make a difference with things like meterorites, it might make a difference against coronal mass ejections, solar wind, radiation, and the like. But we don't know. The switch might be instantaneous.

Answer 6

We are just started to notice and document things like this so we really do not know what is normal and what is not normal until we can build up a history of at least one complete cycle.