Scientists say Earth is undergoing true polar wander

October 2, 2012EARTH - True polar wander is a geophysical theory, a way of thinking about Earth processes that might happen and that these scientists believe do happen. The theory suggests that if an object of sufficient weight on Earth – for example, a supersized volcano or other weighty land mass – formed far from Earth’s equator, the force of Earth’s rotation would gradually pull the object away from the axis around which Earth spins. A supersized volcano far from Earth’s equator would create an imbalance, in other words. As explained at Princeton.edu: If the volcanoes, land and other masses that exist within the spinning Earth ever became sufficiently imbalanced, the planet would tilt and rotate itself until this extra weight was relocated to a point along the equator. That’s the theory of true polar wander. It would cause a movement of Earth’s land masses, but for a different reason than the reason the continents drift in the theory of plate tectonics (formerly called “continental drift”). In the theory of plate tectonics, the continents drift because Earth’s the layer of Earth underlying our planet’s crust (called the mantle) is convective. That is, it circulates, slowly – like water about to boil. In true polar wander, on the other hand, a similar-seeming movement of land masses on Earth’s crust happens in order to correct an imbalance of weight with respect to Earth’s spin. Scientists’ understanding of true polar wander overlaps with their understanding of plate tectonics in various ways. That’s understandable, since it’s all the same Earth. Scientists delving into true polar wander want to know when, in which direction, and at what rate the Earth’s solid exterior might be rotating due to true polar wander. To sort it out, they say, you would need a stable frame of reference to which observations of relative motion might be compared. Doubrovine and his team say they found one: volcanic hotspots. Oceanic hotspots form an island chain. As land plates drift, a successive of volcanoes form over the hotspot. In geology, hotspots are volcanic regions fed by Earth’s underlying mantle. For example, the Hawaiian Islands are believed to have formed over a hotspot in the mantle. The hotspot created a volcano, but then – as that land plate drifted over time, as described by the theory of plate tectonics – the volcano drifted, too, and was eventually cut off from the hotspot. Gradually, another volcano begins to form over the hotspot, right next to the first one. And then it moves on … and another one forms … and so on … and so on. Earth’s crust produces first one, then another volcano over the hotspot until a long chain of volcanoes forms, such as in Hawaii. Hotspots have long been used to understand the motion of tectonic plates. Doubrovine and colleagues went a step further in order to understand true polar wander. Instead of treating the hot spots as static – frozen in place at one spot above Earth’s mantle – their computer model let the hotspots’ positions drift slowly. According to these scientists, this drifting is what produced a model of a stable reference frame, which in turn let them draw conclusions about true polar wander. They say their model does a good job of matching observations of real hotspot tracks on Earth – the path drawn by each hotspot’s island chain – which gives them confidence their results about true polar wander are accurate. –Earth Sky
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This entry was posted in 2012, Earth Changes, Earth Watch, Earthquake Omens?, High-risk potential hazard zone, Magma Plume activity, Planetary Tremor Event, Poleshift risks, Potential Earthchange hotspot, Seismic tremors, Signs of Magnetic Field weakening, Time - Event Acceleration, Volcano Watch. Bookmark the permalink.

12 Responses to Scientists say Earth is undergoing true polar wander

  1. tyroneb says:

    We have a drawf star visiting the neighborhood. It has many names, but most commonly known as Wormwood or Nibiru.
    It’s effects will cull about 96% of the Earth’s population.
    Get out of urban areas, and start preping to the extent of 2 years food for each person you care about.

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  2. George says:

    If this is a possibility for super-volcanoes what of ice; the Antarctic is thickening and figures for the eastern ice sheets alone suggest an increase of between 45-47 billion metric tons for 1992-2003; or is this and other ice masses insufficiently large to have any effect (yet)?

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  3. Grandpa says:

    more water .centrifugal force and depth of oceans along with all the soil through the 100ds of years weve eroded to the oceans would be more of a factor … if many have fially been watching ,lets see where the sun sets this winter

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  4. Shepherd says:

    Isaiah 24:20
    The earth reels to and fro like a drunkard And it totters like a shack, For its transgression is heavy upon it, And it will fall, never to rise again.

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  5. John says:

    Polar wander, my foot. We are now experiencing the early stages of a complete magnetic polar shift. And when that happens the “shift” will really hit the fan. Mega quakes, super volcanoes, mega tsunamis and drastic climactic changes. Life on this planet will never be the same.

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  6. Chris Gerber says:

    These are signs in the Earth … for the last days.. the creation itself is groaning. Eathquakes all over the place in increasing number, volcanic activity attached to that. Global warming(??) probably. Wild weather too. All of which is increasing in frequency and strength.

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  7. Belinda says:

    All that is happening is a natural process of our planet. Unfortunately, this process has progressed during our time. I believe people have survived this processes ( mild ones) thus the warnings ( Ex: The Bible…) . Those in tune with the Earth can feel the process…Scholars can use data to see the changes… Warnings? Only for the strongest….the rest continue their crazy ways of living on this planet….and they will be the ones that will be of concern to those that have prepared….Just brush up on skills that will help you survive…hunting…planting…

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  8. truefaith says:

    from what i have personally gathered in my readings up to this point, i think we have been advanced in the past as a people and whats coming has happened before. it seems to set us back as very little of our population seems to survive the rebirth of our planet.

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  9. Emanni says:

    Electromagnetic Event: Magnetic Pole Shift Could Be In Progress

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    • BlackhawkHensley says:

      Exactly truefaith!!! That’s it totally. I don’t just believe that’s what has happened in the past, I know it has happened in the past and will continue to do so. The evidence is all out there for anyone to read, find and see. We as a species have forgotten how to use our other senses. Luckily, I haven’t. Also, just using plain old logic can be a great tool.

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  10. Scott says:

    I live in New Jersey and have been observing strange occurrences since March 2012. The first was the moon rise in the SE and setting in the W consistently. Also the moon was lighted from the bottom and was not N to S as it is supposed to be. In mid July the sunset was moving more to the NW and I used a compass to observe readings of 318° NW. Then the Sun rose in the NE as well. The setting sun has moved back to the W. But the moon still rises SE and sets W. The man in the moon appears normal when it rises, but I have seen a 90° shift when it sets. I believe that a pole shift has already occured. Evidence also from the Greenland ice sheet melting in four days in 2012, that usually takes three months. Also Europe had a mini ice age event winter 2011, I believe due to new rotation puts Europe at night where the north pole used to be. I experimented with a globe, and put a 30° compound tilt in the month of February. I believe this is the true tilt of the Earth, and that we will continue to role over in this direction.

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