A new study published in Earth and Planetary Science Letters has revealed that the most powerful known solar storm occurred in 12,350 BCE—500 times more intense than the infamous 2005 event, one of the strongest in recent history. At that magnitude, a person could have received a year’s worth of radiation in mere seconds. This ancient event dramatically reshapes our understanding of the Sun’s potential activity and the risks it poses to today’s technological infrastructure.
Researchers from the University of Oulu developed a model called SOCOL:14C-Ex, which detects signs of extreme solar flares through the levels of carbon-14 isotopes found in tree rings. The model was validated against known events, including the flare of 775 CE, and proved to be highly reliable. According to the findings, the 12,350 BCE storm was 18% more powerful than the 775 CE event, making it the most intense solar outburst ever recorded.
The discovery suggests that such extreme solar flares may follow a pattern similar to that observed in other stars—occurring roughly every 6,000 years. However, the exact nature of the 775 and 12,350 BCE events remains under investigation. These findings highlight the urgent need to reassess current safeguards for power grids, satellites, and communication systems, which may not be equipped to handle such massive solar impacts.
The results pave the way for a deeper understanding of ancient solar activity, even during the Ice Age, and underscore the necessity for new protective strategies. As humanity becomes increasingly reliant on technology, knowledge of potential solar superstorms becomes critically important.
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