The north magnetic pole of the Earth is in motion and these movements cannot always be tracked properly. However, it is possible to predict changes in the north magnetic pole by a new study.
The Earth’s magnetic field is critical to life on the planet. According to Justin Revenaugh, a seismologist at the University of Minnesota, the Earth’s magnetic field protects the planet from deadly and destructive solar radiation.
This magnetic field, which protects the earth from the sun and radiation from the sun, is not stable. The north magnetic pole of the Earth (not the same as the geographic north pole) is moving north about 48 km each year.
According to a new study published, it can be understood why the magnetic north pole moves and how to predict these movements.
To follow movements in the Earth’s core
These periodic and sometimes random changes in the liquid nickel and iron in the outer core of the planet, allowing the Earth to have its magnetic field, can cause oddities in the magnetic field.
If we consider that the magnetic field is the rubber bands passing between the magnetic poles and the Earth’s core, we can say that the changes in the core attract these rubber bands to different places. These geomagnetic tuggings cause the north magnetic pole to change and to move away from its position.
By this time, it was very difficult to predict these magnetic field changes. But the geophysicist Julien Aubert and Christopher Finlay simulated the physical state of the Earth’s nucleus with supercomputers.
Researchers knew that there were heat movements moving from the inside of the planet to the outside, and this affected the magnetic field. The results of their research revealed that the iron in the nucleus sometimes caused the heat movements to be warmer and brighter.
Magnetic north, important for navigational models
Following the movements in the magnetic north is very important for the American and European armies that set the navigation systems to the World Magnetic Model (WMM). This model is also used by commercial airlines and smartphones.
For these reasons, the British Geological Survey and the National Oceanic and Atmospheric Administration have to update the WMM every five years. However, according to Aubert, the geomagnetic shocks make the accuracy of the periodic updates more difficult.
The new model developed by Aubert and his teammates can help solve these problems by predicting the changes in the Earth’s magnetic field.