I have to pick this apart because it's making my soul hurt.
Okay, this post will only be written from my general knowledge of science and from what I've been told.
By some galactic alignment and the Niburu passing in 2012, earth will stop spinning. This will basically raise hell on earth (not hell literally)--earthquakes, volcanoes, tsunamis, floods, hurricanes, etc. After some days, so "they" say, the earth will begin to rotate again, but mostly likely on a different axis than it used to.
The earth cannot stop spinning. Period. Even if it falls into the damn sun, it'll still have angular momentum.
Anyway, I started thinking about this which I haven't read anywhere else, yet. Well from what I know, if Earth stops rotating, doesn't that mean the magnetosphere will dissolve for a while? That means we'll have no magnetic protection from the solar winds.
The magnetosphere has nothing to do with Earth's rotation. At all. The earth is full of iron and is effective a big magnet.
Also, don't we need our magnetosphere to power our machines? Electricity will be lost for the time being.
No.
Furthermore, if machines won't work neither will our bodies. Since our brains and whole nervous system simply run on electric, will we die?
...sigh...
http://en.wikipedia.org/wiki/MagnetosphereThis is why we need reruns of Bill Nye the Science Guy XD
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Ok that was a bit harsh but I've gotten that out of my system.
Aight. So the earth is a giant ball of rock with a molten metal core. This core is magnetic. It has momentum, and can't physically stop spinning. What you are confusing is Geomagnetic Reversal with Pole Shift. Pole shift is when the axis of rotation moves over the course of hundreds, thousands, if not millions of years. Geomagnetic reversal is when the polarity (North-South) flips, however this isn't theorized to happen anytime soon. This is theorized to be possible due to the liquid nature of Earth's Core. There would be a period in which there was no strong magnetic field, and this might screw with homing pigeons and navigation by compass, but other than that, it won't affect daily life.
Magnets which are used in generators have their own magnetic field, it has nothing to do with the earth's field. And the human body's ion channels have nothing to do with magnetic fields whatsoever, it's a completely chemical process.
Hope that clears things up.