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Originally posted by Pilgrum
I've checked to find that there's no discernable change in magnetic north (or south) from my location using plain old magnetic compasses.
…the NMP drifts from year to year as geophysical processes within Earth change. For more than 150 years after Ross's measurement its movement was gradual, generally less than 15 kilometers per year. But then, in the 1990s, it picked up speed in a big way, bolting north–northwest into the Arctic Ocean at more than 55 kilometers per year. But why?
One compelling explanation appears in the December 21 Eos, the weekly transactions of the American Geophysical Union. In their Eos article (subscription required), and in a longer paper published earlier in 2010 in the Journal of Geophysical Research–Solid Earth, Arnaud Chulliat of the Institute of Earth Physics of Paris and his colleagues venture that a twisting molten plume beneath the Artic could be the cause:
According to some recent models, plumes of less dense fluid form at the inner core boundary and subsequently rise within [a cylinder] whose central axis is the Earth’s rotation axis. Such plumes undergo a strong helical motion due to the Earth’s rapid rotation, a phenomenon also observed in laboratory experiments with water. In the core, helical plumes advect and twist the magnetic field lines, forming what scientists call "polar magnetic upwellings."
Those upwellings, unloaded into the Arctic mantle, could produce intense patches of magnetic activity on the sort of decade-long timescales needed to explain the NMP's sudden acceleration. (The authors compare these patches to a kind of terrestrial version of sunspots.) And magnetic field measurements show dramatic shifts near the New Siberian Islands that seem to fit the bill.
I'm sorry to be the one to tell you that your compass doesn't work quite right. It doesn't really point to the north pole or the south pole.
…Adjust Your Compass
On many compasses, you are able to adjust the declination by twisting a ring, using a screw, or some other method of changing where the orienting arrow sits in relation to the ring.
more...
They've also learned what happens during a magnetic flip. Reversals take a few thousand years to complete, and during that time--contrary to popular belief--the magnetic field does not vanish. "It just gets more complicated," says Glatzmaier. Magnetic lines of force near Earth's surface become twisted and tangled, and magnetic poles pop up in unaccustomed places. A south magnetic pole might emerge over Africa, for instance, or a north pole over Tahiti. Weird. But it's still a planetary magnetic field, and it still protects us from space radiation and solar storms.
They've also learned what happens during a magnetic flip. Reversals take a few thousand years to complete, and during that time--contrary to popular belief--the magnetic field does not vanish. "It just gets more complicated," says Glatzmaier. Magnetic lines of force near Earth's surface become twisted and tangled, and magnetic poles pop up in unaccustomed places. A south magnetic pole might emerge over Africa, for instance, or a north pole over Tahiti. Weird. But it's still a planetary magnetic field, and it still protects us from space radiation and solar storms.
Originally posted by discl0sur3
Originally posted by oswego
reply to post by discl0sur3
mainstream news now, i wish i could see headlines about a year ahead , i wander what they would be titled ... btw.. i think i remember seeing a,youtube video about you saying something was heading towards earth, how did that turn out? is it still on its way? or is it the space junk nasas been talking about?
I'm assuming you're referring to the 3 large objects discovered by SETI late last year?
Apparently, still inbound. Here's a link to a recent article that discusses the subject. I wonder if this has anything to do with the magnetic anomalies?
Article
Originally posted by daryllyn
I wanted to watch the video but got a message saying that it had been removed. Is there any way you could find another link to the same video?
They also confirm what I'm trying to say in that magnetic compasses are changing only by about 1 degree per decade or less as a result of the movement which really isn't even noticable to us or wildlife.
The only links needed are access to a reasonable compass... nothing unusual is happening but if I detect anything out of the ordinary in the future I'll post details here on ATS ASAP