In 1921, one of the strongest geomagnetic storms in Earth’s history occurred

According to the experts, the magnetic storm reached 907 ± 132 nTL at the time of the peak. The widely known “Carrington Event”, the most powerful geomagnetic storm of 1859, has this parameter considered to be 900 nTL.

If something like this were to happen today, humanity would face massive power outages, profound changes in satellite orbits, and the loss of radio-based equipment. The collapse of the GPS system would have had a significant impact on logistics and emergency services.

Later, in 1967, a massive flare nearly caused a nuclear war.