The North Earth's magnetic pole is so unnecessary that scientists need to update the global magnetic field model they released four years ago. Can this be a sign that the magnetic pole will soon be spinning?
The World Magnetic Model (WMM) – the name of the updated Earth Magnetic Field – is expected to be released no earlier than January 30. about two weeks later than scheduled, with a delay due to the closure of the government, according to a report in Nature.
The magnetic pole moves unevenly from the Canadian Arctic and into Siberia so unpredictable that it surprises the scientists. This update for 2015 was supposed to remain valid until 2020, said Arnolul Chulliat, a geomagnetic at the University of Colorado at Boulder and the National Environmental Information Centers of the National Oceanic and Atmospheric Administration (NOAA). [Earth̵
There is no news that the pole is moving; Long-term records from London and Paris (stored since 1580) indicate that the northern magnetic pole is moving unevenly around the rotating North Pole for several hundred years or more, Ciaran Beggan, a geophysicist with the British Geological Survey who participates in WMM updates, Space.com said in an email. He cites a 1981 study from the Philosophical Transactions magazine of the Royal Society of London. Around the mid-1990s the pole suddenly accelerated its movements from just over 15 kilometers per year to 34 miles (55 kilometers) per year. Last year, the pole was running on the international date line to the Eastern Hemisphere
The main cause of the movement comes from the outer core of the iron of the Earth, which is also called the "nucleus of the nucleus." Smaller factors also affect movement. These influences include magnetic minerals in the earth's crust and upper mantle (especially for local magnetic fields) and electric currents generated by the sea water moving through the "surrounding magnetic field", according to the 2015 report of the UMM.
"One reason we can update the map is that the European Space Agency is launching a set of very accurate magnetic field satellites in 2013," said Beggan, citing Swarm.
"We have a superb set of data from which we can do very good magnetic data – Field maps and update them every six to twelve months," added Began. "We noticed that the WMM specification was not implemented in the area with high latitude around the pole, since the error exceeds an average of 1 degree angle. This has prompted us to investigate whether it is worth publishing a new update. "Moreover, the core of the kernel seems to be weakening – which may be a sign that the planet's magnetic field will turn to figure out better how this will happen , here's how the main sphere works, according to Ronald Merrill, Professor of Earth and Space Sciences at the University of Washington, who spoke on Live.com's Space.com site on Space.com
Imagine the field is to think of a bar magnet , which passes through the center of the Earth and has a north pole and a south pole, says Merrill, who has been involved in the new UMM study.This magnet is strong, representing about 75% of the Earth's magnetic field surface intensity
Of course, the band magnet is not a perfect representation – it is actually an electric current that generates the magnetic field of Earth – but the model makes it easier to imagine what's happening on Earth, Merrill added. In particular, the "magnetic tape" not only moves, but is also becoming weaker, with approximately 7% every 100 years .
As for the other 25% of the magnetic field, Merrill said it was generated from another field you can do. photo as another moving magnet. Here's an interesting element: Because the central magnetic tape loses intensity, this second, less magnetic field generates more influence on Earth's global magnetism. "And this is the reason this field moves in the direction of [of Siberia]," Merrill said live.
The north and south poles of the Earth periodically change their places, with the last flip going about 780,000 years ago. (The poles also weaken temporarily and quickly about 41,000 years ago, he added, but never underwent complete reversal.) A 2018 study in the Proceedings of the National Academy of Sciences suggests that Earth's magnetic field has fallen before the great switching. Although any magnetic field overflow would still be thousands of years, the effects could be deep in technology if it is similar to today's technology. This is because the weaker magnetic field would be a little bit worse in protecting the Earth from the solar wind (the steady stream of charged particles emanating from the sun) and the cosmic rays (radiations from deep space). Magnetic compasses would not be so accurate, and time-tracking satellites or telecommunication signals could be interrupted, said Monica Corte, head of GFZ Potsdam's working group on the evolution of the geomagnetic field in Germany. "With regard to increased radiation that would be accompanied by diminished protection, [but] it appears that the atmosphere will still provide sufficient ground protection that humans and animals will not be significantly affected," she told Space.com e-mail. "However, all the effects we see only during strong solar / geomagnetic storms are likely to increase and appear … during moderate solar activity," she added. "This includes satellite disruptions or satellite damage, increased long-range aircraft radiation doses, and telecom and GPS signals from [International Space Station][and] and [and]." The flight will continue after the release of WMM, mainly through the mission of the European Space Agency swarms, said Corte. But she noted that measuring the position of the northern magnetic pole is a challenge. This is because the pole is located in a remote area, and Earth's magnetic field measurement is influenced by all magnetic field sources – including the magnetic fields found in the Earth's atmosphere (ionosphere and magnetosphere).
"This will depend on the future change of the magnetic field, which we can not predict if a new update of the model can be needed from the usual schedule," she added.
The next WMM update this year is expected early in 2020, Began said. You can read more about WMM here.
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