Jim Kelley wrote:
Cecil Moore wrote:
Art Unwin wrote:
I would really like to know about the North Pole's movement.
It too has a cyclic motion and the last I heard was that the North
Pole had reached Siberia
and showed no signs yet of returning. Is the Earth going to respond to
the lack of cyclic motion the same as the Sun?

http://ddig.wordpress.com/2008/06/05...pole-reversal/


"The magnetic poles wander around the vicinity of the geographic
poles all the time – the north magnetic pole currently resides
in the Canadian Arctic. However, at relatively regular intervals
throughout the 4.5 billion year history of the planet, the magnetic
poles have flipped completely. A few thousand years before a reversal,
the magnetic field gradually gets weaker; something which could cause
problems for inhabitants of the planet."

Now if we could only get it to oscillate at 50/60 Hz........;-)

73, ac6xg

The magnetic north pole being in (or close to) Canada, the Canadians
have a quasi-proprietary interest, and they have one of the better websites:
http://gsc.nrcan.gc.ca/geomag/nmp/northpole_e.php

http://gsc.nrcan.gc.ca/geomag/nmp/long_mvt_nmp_e.php has a map showing
the movement. Indeed, one prediction shows that in 2050 it will be off
the Siberian coast.

Interesting also how it moves around 85km a day, in a diurnal variation.


Among other things:
Many authors have pointed out that the dipole part of the magnetic field
has been weakening during historic times, and that if the present trend
continues, the dipole field will go to zero in roughly 1500 years. Some
people take this to mean that we are entering a reversal.