In the 1990s, the drift rate of the Earth’s north magnetic pole suddenly increased, from 1990 to 2005 the drift rate reached 60 km per year.
Our Earth is a planet with a very large magnetic field. For billions of years, it has protected life on Earth from the attack of high energy cosmic rays, protected our precious atmosphere from solar wind, and also protected life on Earth, like human civilization.
In 1831, scientists first confirmed that the Earth’s North Magnetic Pole was located in the region of Nunavut – the newest, largest and most northerly in the Earth’s magnetic field.
However, soon after, scientists found that the Earth’s north magnetic pole appeared unstable and refused to stay in one position and had an average travel speed of around 15 km per year.
However, in the 1990s, the North Magnetic Pole drift rate suddenly increased. From 1990 to 2005, the drift rate reached, so to speak, 60 km per year. In October 2017, the magnetic north pole crossed the international date line and moved from the western hemisphere to the southern hemisphere, then drifted south.
The speed of this magnetic pole movement was so fast that it changed the navigation of the GPD and forced scientists to create a new geomagnetic model of the world to provide everything from aircraft navigation to global positioning system (GPS ) on smartphones.
So why is the geomagnetic pole changing so much?
A new study from the University of Leeds in the UK suggests it could be caused by major changes inside the Earth. When the earth’s core radiates heat outward, it causes convection of molten iron in the outer liquid core and a magnetic field generated by the eddy currents of liquid iron swirling in the outer part of the earth’s core. Therefore, variations in this flow can change the position of the North Pole. However, at the intersection between the Earth’s core and mantle, these two eddy currents always “struggle” with each other.
This means that if there is an uneven density in the liquid outer core, changes in the magnetic poles can be caused.
By scanning the seismic waves, the scientists determined that the magnetic field is not encapsulated in the core, but that magnetic fields flow from the earth’s crust. And it is the two magnetic lines under Canada and Siberia that are where the core magnetic lines escape.
From 1999 to 2019, the magnetic flux under Canada in Canada continued to stretch and grow from east to west and split into two smaller interconnected magnetic fluxes, which may have been formed by the change of the core terrestrial during the period 1970 – 1999.
This division of the magnetic field below Canada weakens the magnetic field of this magnetic field, and the stronger magnetic field tends to move closer to Siberia, which also causes the magnetic field to flow towards it. ‘outside. pulling the magnetic north pole towards it.
However, scientists believe that these two large magnetic field currents are inherently in equilibrium, but with only a few small changes the position of the north magnetic pole can be changed and it is very difficult to achieve this. will then pass.
Over the past 7,000 years, the North Magnetic Pole has moved around the North Pole in a very chaotic fashion without a pattern. It moved to Siberia 1300 BC and drifted again under Canada for the past 400 years.
But you can rest assured that this change in the position of this magnetic pole will have no impact on life on Earth. Even if it goes further, there is no need to panic because it has happened several times before, only the interior of the Earth will always be changed.
