Would you have thought? Such is the sound of a rotating magnetic field of the earth

The Earth’s magnetic field changed dramatically about 41,000 years ago. Thanks to the interpretation of information collected by the Swarm satellite mission of the European Space Agency, we can now experience this epic turn. Combined with the evidence of the movement of the earth’s magnetic field lines, the satellite data were mapped to the Laschamps event and depicted with natural noises such as the squeak of wood and the collision of colliding rocks.

• The Earth’s magnetic field suffered a dramatic change 41,000 years ago, known as a Laschamps event.

• During the event, the weakening of the magnetic field increased the entry of cosmic radiation into the Earth’s atmosphere.

• Changes in the magnetic field may have had a significant impact on human history and environment.

The compilation presented by the Danish University of Technology and the German Earth Sciences Research Center in 2024 is not comparable to anything you have heard so far. Our planet The magnetic field of the Earth, derived by liquid metals in its seed, reaches tens of thousands, and even hundreds of thousands of kilometers, and it all protects us by deflecting the sunlight that lost the atmosphere.

The sound of the rotating magnetic field of the Earth

As the iron and nickel in our planet change, the Earth’s magnetic field changes, which means that the northern (and south) poles are constantly in motion. Recently, the position of the magnetic Arctic, which will continue to shift from Canada to Siberia, has been officially changed. In the current orientation, the magnetic field lines form closed loops, which are directed above the planet’s surface from south to north and then in the depths of the planet from north to south. However, the field occasionally reverses its polarity. If this happened again today, our northern compasses would point to the South Pole.

The last such cataclysmic event took place about 41,000 years ago and left a trace in the Laschamps lava streams in France. As the field weakened to only 5 percent of its current power, thanks to the reversal process, the surplus of cosmic radiation entered the Earth’s atmosphere. Ice and sea sediment retain isotopic signs of this greater solar radiation, and according to a study published last year, the level of Berillium-10 isotopes has doubled during the Laschamps event.

These changed atoms are formed when cosmic radiation reacts with our atmosphere, ionizing the air and baking the ozone layer. As a possible consequence of global climate change, the extinction of Australian megafauna and changes in human cave use may be associated with this event. sciencealert.com.

« Understanding these extreme events is important for their future occurrence, the survey of space climate forecasts, and the effects of the environment and the Earth system » explained Sanja Panovska, a geophysicist at the German Geotology Research Center.

The Laschamps turn took 250 years and remained about 440 years in unusual orientation. The Earth’s magnetic field could remain at most 25 percent of its current strength, while the northern polarity drifted to the south. Anomalies in the recently experienced magnetic field, such as the weakening of the Atlantic Ocean, have raised questions about an upcoming turn, but according to recent research, these anomalies are not necessarily related to turning events.

However, South Atlantic anomaly exposes the satellites in the area to higher radiation. Since 2013, the ESA Swarm constellation has measured magnetic signals from the Earth’s core, cloak, bark, oceans, ionospheres and magnetospheres to better understand the geomagnetic field of our planet and predict its fluctuations.