Originally posted by swampcricket
I think the most likely "doomsday"scenario would be earth crust displacement. I am no expert but it has something to do with the magnetic alignment
of the north and south poles. Anyone know anything about that subject if so please let me know.
Here's the deal. The earth has magnetic poles, just like, well, a magnet. The deep deep portions of the earth is madeup of iron and metal, its
magnetic.
The earth
also has geometric poles, like any sphere would. The geometric and magnetic poles are in (roughly) the same location.
The magnetic poles can, for whatever the reason, switch. This means that what is magnetic north now is in in the geometric north pole. With the
switch, the "magnetic north" is at the geometric south.
The magnetic poles, the polarity of the magnetic rays, are what change, not the crust. The changing magnetic poles has happened many times in the
past, and has happened while humans were around. Its not destructive.
You are thinking of a seperate idea wherein the crust of the earth dettached and rotates around the earth like a loose skin, very suddenly. This is a
hard core conspiracy theory with no actual evidence to support it and indeed evidence that seems to refute it. Often the ideas of this crustal
movement and magnetic reversal are conflated/confused, but that have nothing to do with one another.
Magnetic reversals exist and have occured frequently. The loose crust thing doesn't happen.
Actually its even more confusing. A compass has a magnetic needle with one pole marked 'north'. Its a magnetic north pole. It is
not
attracted to another magnetic north. Magnetic Norths repel each other. The magnetic north end of the needle, which is what points in the geographic
direction of 'North', is being attracted by a
magnetic south pole.
...unless I am confusing myself and its the other way around!