Time it takes to reverse the Earth’s pole

It can be seen that the Earth has undergone a geomagnetic reversal, in which the North and South poles change several times in the billions of years since its birth. Depending on the stratum and other circumstances, the cycle is considered to be approximately hundreds of thousands of years apart, but no traces have been found since the last reversing Matsuyama-Brunhes reversal occurred 770,000 years ago. It can be said that the next geomagnetic reversal is not strange anytime it occurs.

The Earth’s magnetic field has been considerably weakening since the 19th century, and there are reports that recently it is heading from Canada to Siberia at an unprecedented rate.

However, since the geomagnetic reversal, where the compass points north and south completely changes, usually takes 7,000 to 9,000 years, even if this happens, humans may not be able to feel it. In fact, according to a new study by a research team at the University of Wisconsin’s Medicine, it took at least 22,000 years to 770,000 years ago.

The research team analyzed the magnetic field measurements and radioisotope dating of samples collected from erupted lava erupted during the previous extreme reversal, such as Chile, Tahiti, Hawaii, the Caribbean, and the Canary Islands. A study of the Earth’s magnetic field for 70,000 years centering on the Matsuyama-Brune station. While the last reversal took less than 4,000 years, it was discovered that there were two temporary or partial reversals, dating back about 18,000 years.

The research team measured the magnetic field measurements at the seabed and the amount of beryllium contained in the Antarctic ice core, and confirmed that the results also did not have the magnetic error of the gastric reversal phenomenon. The seabed magnetism is lower than lava, but more continuous data can be obtained. In addition, the ice core is a strong magnetic field, and when the amount of radiation in space changes and the magnetic field weakens, the amount of beryllium produced by the radiation increases.

The research team now believes that the reduction of the Earth’s magnetic field may be an early stage of a new stimulus reversal. However, it is expected that it will still take thousands of years to know if it will happen. Related information can be found here .