Weak Doomsday Notion About a Geomagnetic Flip
    By Enrico Uva | November 28th 2012 01:44 PM | 1 comment | Print | E-mail | Track Comments
    When it comes to believing that the end of the world is around the corner, there isn't just the Nibiru threat. There are also fears about planet alignments and large solar storms, events which are not imminent but which won't be apocalyptic either when they do happen.

    The public nags NASA so often about these matters that they have put up an FAQ page entitled, Beyond 2012: Why the World Won't End.

    But the more interesting part is a link within a link, a discussion of magnetic pole flips.


    These have occurred periodically, possibly because the field lines within the planet are not orderly like those of a bar magnet. But the last time we had one, 780 000 years ago, there's no record of devastating effects on plant or animal life.

    Doomsday theories often claim that the magnetic field shuts off for a short but devastating moment during the reversal, but there is no evidence that this ever happened. 

    A more detailed and well-written article by Oliver Knevitt appeared here on Science 2.0 last year. Did you know, for instance, that a self-sustaining dynamo is not the only way a magnetic field can be created? What alternate mechanism is behind Europa's field?

    Read Knevitt, and you'll find out! 

    Comments

    Interesting, thanks for the update.