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North Magnetic Pole Racing Toward Siberia

RogerRoast sends along a backgrounder from Scientific American on the best current theory as to why the north magnetic pole drifts. "The NMP, also known as the dip pole, is the point on Earth where the planet's magnetic field points straight down into the ground. Scottish explorer James Clark Ross first located the NMP in 1831 on the Boothia Peninsula in what is now northern Canada... [T]he 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, ... bolting north–northwest into the Arctic Ocean at more than 55 kilometers per year. If it keeps going it could pass the geographic north pole in a decade or so and carry on toward Siberia."

8 of 187 comments (clear)

  1. Eeep! by jd · · Score: 5, Funny

    Will Putin's ambitions stop at nothing?

    (Besides, a fast-moving magnetic pole screws up the UK's Ordinance Survey maps, which are magnetic north aligned.)

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    1. Re:Eeep! by jc79 · · Score: 5, Informative

      Parent is wrong. Ordnance Survey maps are NOT magnetic north aligned. They are aligned to OS Grid North, which is fixed wrt the UK (but not congruent with True North). Each printed map sheet has a diagram indicating the deviation from grid north of magnetic north at the centre of the sheet at a given epoch. When taking a bearing with a protractor compass, it is necessary to account for the magnetic deviation before following that bearing (in Scotland, magnetic north is currently 2 deg west of grid north).

    2. Re:Eeep! by icebike · · Score: 5, Insightful

      The funny thing is.... No one knows if this speed-up is a natural cycle, or if there's really something out of whack with the core.

      There being no artificial means of altering the magnetic field of the entire planet, you can rest assured that the speed up is a natural occurrence. /smirk

      As for it being part of a cycle, magnetic pole wandering, and indeed complete reversals, while documented in geology, follow no easily discernible pattern over time, with long periods of stability followed by many reversals over a short period.

      There are some claim the pattern is a Lévy distribution, but this has yet to be proven, and that fact by itself provides no predictive capabilities.

      There is a pretty good wiki article on this. The article includes a time-chart showing reversals of the magnetic field. There are very long periods of stability, as well as periods of frequent short reversals.

      Magnetic Pole reversals happen over a period of time of tens of thousands of years, and a reversal is proceeded by a diminishing of field strength, not necessarily by pole wandering. The current rate of field strength weakening suggests a reversal sometime in the years 3000-4000.

      So the speed up of the NMP's movement is not significant in estimating a reversal, and a reversal does not signify anything out of "whack" with the core of the earth.

      It is a perfectly natural thing that has occurred many many many times. And yes, mankind has lived thru reversals entirely unaware.

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  2. Our molten core is shifting by BadAnalogyGuy · · Score: 4, Funny

    The probable cause of this is a sudden shift in the tilt of our molten core. This would realign our magnetic poles.

    But it may also be indicative of a bigger problem. There was a film a few years back which explored the possibility of a sudden loss of angular momentum within the Earth's core. Without the spinning core, the magnetic field would be lost and our planet would lose the protection afforded to us by the magnetosphere. Essentially, we would become windswept by the solar wind and would end up without an atmosphere, much like Mars.

    The solution, the scientists in the film agreed, was to prepare several nuclear bombs which could be transported to the edge of the core (below the mantle) and detonated, thus restarting the spinning core. It seemed like a crazy theory, but with this sudden acceleration of the NMP, I think it might be wise to keep an eye on all of our options.

    1. Re:Our molten core is shifting by Bill,+Shooter+of+Bul · · Score: 4, Insightful

      I think you need to go back and study a little more science.

      First rule of science: go where the data leads you. When we learn more about the way our universe works, we update our thoughts about the way the universe works.

      Second Rule of science: Investigate the sources of reports. If the main source is not a scientist in the field of study, and/or it was paid for by a notoriously insane group that is not respected by the scientific community at large, do not trust. PETA is one such group. They just want people to not kill animals. They don't really care why you don't kill animals, they just want you to not kill animals. So, they try to provide as many reasons why you shouldn't as possible. If you presented them with a "study" that showed them that raising animals to be killed caused the earthquake in Haiti, they would probably post it on their website.

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  3. World stability by snsh · · Score: 5, Funny

    This is good news. Everyone knows that you regain stability by moving all your poles into the right hand plane.

  4. Alternative solution by MobyDisk · · Score: 4, Funny

    How about we just stick a GIANT MAGNET right smack on the real North Pole? That way, we don't need to worry about the "natural" pole shifting. Set this artificial magnet to have a different frequency than the earth's natural magnetism, so we can set our compass magnets to that same frequency and not worry about interference. (This will also keep this valuable asset from wandering into Russian territory.)

  5. YOU Know the Cause by ChiRaven · · Score: 4, Funny

    You just don't want to admit it. It's another inevitable byproduct of anthropogenic global warming caused by greenhouses gasses. That should be obvious to anyone. Expect the IPCC papers on the subject to be exposed by a whistle-blower any day now. Insiders are predicting that the studies will show that the pole is repelled by the stronger SOURCES of the gasses, but there is a lag effect, so it is only now moving away from US, and toward Siberia. In an exchange of email messages also to be released at the same time by this anonymous whistle-blower, two of the secondary authors are reported to have said "aren't these econometric models WONDERFULLY flexible?"