The planet's magnetic field is again in danger and the geologists are very stunned.
Earth's magnetic poles can wander several miles each year, however, the movement of the North Pole has become increasingly strange in recent years. For reasons that are currently unclear, the magnetic north pole seems to be increasingly waning from Canada and Siberia at an erratic rate, according to a report in Nature.
"The location of the magnetic north pole appears to be governed by two large areas of magnetic field, one below Canada and one below Siberia," said Phil Livermore, a geomagnetist at the University of Leeds in the United Kingdom in the latest issue of American Geophysical . Meeting of the Union, in accordance Nature.
"The Siberia patch is winning the competition."
Every five years, the National Oceanic and Atmospheric Administration (NOAA) maps the Earth's World Magnetic Model (WMM) This was last published in 2015 with the next edition scheduled for 2020, but this freak behavior forced the scientists to revise the map ahead of schedule. Unfortunately, the new WMM should have been released on January 15, but was postponed until at least January 30 due to the government's shutdown.
The Earth's magnetic field is created by the cast iron in its core that revolves around the convection currents. It is a rather chaotic situation, resulting in a complex pattern of magnetism that can be extremely difficult to model and predict. Just to make things even more complicated, an extraordinarily strong geomagnetic pulse occurred in South America in 2016, which is believed to have contributed to the recent unexpected changes.
However, it is not yet clear why the magnetic field under Canada seems to weaken so strangely.
You may be wondering if this is important. Well, the magnetic field is central to many forms of navigation. Obviously, a compass depends on magnetic fields, but more advanced navigation systems also use the field as a bearing. Currently, these anomalies should not be strong enough to ruin everything, however, certainly is something that geologists need to keep in mind.
In fact, it is possible that truly monstrous changes in the magnetic field occur. Scientists know that Earth can undergo a phenomenon known as "geomagnetic inversion," where these magnetic poles literally change sides. The last time this happened was 781,000 years ago, but it is believed to have occurred every 20,000-30,000 years in the last 20 million years. years (although there were exceptions).