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Thread: Earthís magnetic field is acting up and geologists donít know why

  1. #1

    Earthís magnetic field is acting up and geologists donít know why

    Something strange is going on at the top of the world. Earth’s north magnetic pole has been skittering away from Canada and towards Siberia, driven by liquid iron sloshing within the planet’s core. The magnetic pole is moving so quickly that it has forced the world’s geomagnetism experts into a rare move.
    On 15 January, they are set to update the World Magnetic Model, which describes the planet’s magnetic field and underlies all modern navigation, from the systems that steer ships at sea to Google Maps on smartphones.
    The most recent version of the model came out in 2015 and was supposed to last until 2020 — but the magnetic field is changing so rapidly that researchers have to fix the model now. “The error is increasing all the time,” says Arnaud Chulliat, a geomagnetist at the University of Colorado Boulder and the National Oceanic and Atmospheric Administration’s (NOAA’s) National Centers for Environmental Information.
    The problem lies partly with the moving pole and partly with other shifts deep within the planet. Liquid churning in Earth’s core generates most of the magnetic field, which varies over time as the deep flows change. In 2016, for instance, part of the magnetic field temporarily accelerated deep under northern South America and the eastern Pacific Ocean. Satellites such as the European Space Agency’s Swarm mission tracked the shift.
    By early 2018, the World Magnetic Model was in trouble. Researchers from NOAA and the British Geological Survey in Edinburgh had been doing their annual check of how well the model was capturing all the variations in Earth’s magnetic field. They realized that it was so inaccurate that it was about to exceed the acceptable limit for navigational errors.
    Wandering pole

    “That was an interesting situation we found ourselves in,” says Chulliat. “What’s happening?” The answer is twofold, he reported last month at a meeting of the American Geophysical Union in Washington DC.
    First, that 2016 geomagnetic pulse beneath South America came at the worst possible time, just after the 2015 update to the World Magnetic Model. This meant that the magnetic field had lurched just after the latest update, in ways that planners had not anticipated.



    Second, the motion of the north magnetic pole made the problem worse. The pole wanders in unpredictable ways that have fascinated explorers and scientists since James Clark Ross first measured it in 1831 in the Canadian Arctic. In the mid-1990s it picked up speed, from around 15 kilometres per year to around 55 kilometres per year. By 2001, it had entered the Arctic Ocean — where, in 2007, a team including Chulliat landed an aeroplane on the sea ice in an attempt to locate the pole.
    In 2018, the pole crossed the International Date Line into the Eastern Hemisphere. It is currently making a beeline for Siberia.
    The geometry of Earth’s magnetic field magnifies the model’s errors in places where the field is changing quickly, such as the North Pole. “The fact that the pole is going fast makes this region more prone to large errors,” says Chulliat.
    To fix the World Magnetic Model, he and his colleagues fed it three years of recent data, which included the 2016 geomagnetic pulse. The new version should remain accurate, he says, until the next regularly scheduled update in 2020.


    Core questions

    In the meantime, scientists are working to understand why the magnetic field is changing so dramatically. Geomagnetic pulses, like the one that happened in 2016, might be traced back to ‘hydromagnetic’ waves arising from deep in the core1. And the fast motion of the north magnetic pole could be linked to a high-speed jet of liquid iron beneath Canada2.
    The jet seems to be smearing out and weakening the magnetic field beneath Canada, Phil Livermore, a geomagnetist at the University of Leeds, UK, said at the American Geophysical Union meeting. And that means that Canada is essentially losing a magnetic tug-of-war with Siberia.
    “The location of the north magnetic pole appears to be governed by two large-scale patches of magnetic field, one beneath Canada and one beneath Siberia,” Livermore says. “The Siberian patch is winning the competition.”
    Which means that the world’s geomagnetists will have a lot to keep them busy for the foreseeable future.

    https://www.nature.com/articles/d41586-019-00007-1




    PUTIN IS STEALING THE NORTH POLE AND HE IS GOING TO ETHNICALLY CLEANSE SANTA AND THE ELVES AND STEAL THE MAGIC TOY FACTORIES SO THAT HE CAN USE THEM TO MAKE UNLIMITED WAR MACHINES TO CONQUER THE EARTH
    Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

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    Those who fail to learn from the past are condemned to repeat it.
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    A Zero Hedge comment



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  3. #2
    "The Patriarch"

    willie with tan lines: enjoy the shots and the woman
    Quote Originally Posted by Schifference View Post
    The man did not think clearly. It was almost as if he had brain cancer of something.

  4. #3
    Quote Originally Posted by Origanalist View Post
    Putin denier.
    Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

    Robert Heinlein

    Give a man an inch and right away he thinks he's a ruler

    Groucho Marx

    I love mankindÖitís people I canít stand.

    Linus, from the Peanuts comic

    You cannot have liberty without morality and morality without faith

    Alexis de Torqueville

    Those who fail to learn from the past are condemned to repeat it.
    Those who learn from the past are condemned to watch everybody else repeat it

    A Zero Hedge comment

  5. #4
    Not me, I'm looking for the video that proves Putin is causing this right now.
    "The Patriarch"

    willie with tan lines: enjoy the shots and the woman
    Quote Originally Posted by Schifference View Post
    The man did not think clearly. It was almost as if he had brain cancer of something.

  6. #5
    "He's talkin' to his gut like it's a person!!" -me
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  7. #6
    https://science.howstuffworks.com/en...uestion782.htm

    Why does the North Pole move?

    The Earth has several poles, not just two. It has geographic north and south poles, which are the points that mark the Earth's axis of rotation. It also has magnetic north and south poles, based on the planet's magnetic field. When you use a compass, it points to the magnetic north pole, not the geographic North Pole.

    The Earth's magnetic poles move. The magnetic North Pole moves in loops of up to 50 miles (80 km) per day. But its actual location, an average of all these loops, is also moving at around 25 miles a year [ref]. In the last 150 years, the pole has wandered a total of about 685 miles (1102 kilometers). The magnetic South Pole moves in a similar fashion.



    The poles can also switch places. Scientists can study when this has happened by examining rocks on the ocean floor that retain traces of the field, similar to a recording on a magnetic tape. The last time the poles switched was 780,000 years ago, and it's happened about 400 times in 330 million years. Each reversal takes a thousand years or so to complete, and it takes longer for the shift to take effect at the equator than at the poles. The field has weakened about 10% in the last 150 years. Some scientists think this is a sign of a flip in progress.

    The Earth's physical structure is behind all this magnetic shifting. The planet's inner core is made of solid iron. Surrounding the inner core is a molten outer core. The next layer out, the mantle, is solid but malleable, like plastic. Finally, the layer we see every day is called the crust.

    The Earth itself spins on its axis. The inner core spins as well, and it spins at a different rate than the outer core. This creates a dynamo effect, or convections and currents within the core. This is what creates the Earth's magnetic field -- it's like a giant electromagnet.

    Exactly how the dynamo effect changes the field isn't widely understood. Shifts in the core's rate of spin and the currents within the molten material most likely affect the planet's field and the location of the poles. In other words, the poles move because the convection in the core changes. These changes might also cause the poles to switch places. Irregularities where the core and mantle meet and changes to the Earth's crust, like large earthquakes, can also change the magnetic field.



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  8. #7
    Godzilla is about to resurface.
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  9. #8
    It's either the fault of Russia or climate change. I guess the ultimate rabbit hole for CNN would be to figure out if Climate change is responsible for Russia or is Russia responsible for climate change.



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  11. #9
    Quote Originally Posted by RJB View Post
    It's either the fault of Russia or climate change. I guess the ultimate rabbit hole for CNN would be to figure out if Climate change is responsible for Russia or is Russia responsible for climate change.
    I can't find it now but a long time ago I posted a story that was blaming Russia and Putin for global warming and saying that Russian meddling was behind "climate deniers".
    Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

    Robert Heinlein

    Give a man an inch and right away he thinks he's a ruler

    Groucho Marx

    I love mankindÖitís people I canít stand.

    Linus, from the Peanuts comic

    You cannot have liberty without morality and morality without faith

    Alexis de Torqueville

    Those who fail to learn from the past are condemned to repeat it.
    Those who learn from the past are condemned to watch everybody else repeat it

    A Zero Hedge comment



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