We know the geomagnetic poles reverse, and we know we're due for another reversal pretty soon (within 1,000 years) so do you think this inner geomagnetic upheaval 'agitates' the core, making it hotter and thereby causing it to expand? Is there any other valid geological reason that could make the core hotter?
Also, what is your explanation for why geomagnetic reversals occur? Would you say it's in response to an inner influence within the core (if so what/why), or otherwise an external one such as our approaching proximity to the galactic centre and its possible influence, and/or our current position in the spiral arm of our galaxy? I'm interested in properly thought-out theories please; preferably from actual geologists. Thanks.
2007-07-24
05:28:12
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8 answers
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asked by
Anonymous