An illustration of a solar storm. Depositphotos.

14,300 Years Ago The Biggest Solar Storm Ever Struck Earth

By juxtaposing this radiocarbon surge with beryllium measurements from Greenland ice cores, the team deduced that an enormous solar storm was responsible for ejecting a vast amount of energetic particles into our atmosphere.


An exceptional spike in radiocarbon levels discovered within ancient tree rings from the French Alps has led an international consortium of scientists to identify the most massive solar storm ever recorded. It was even more powerful than the famous Carrington Event.

Key Takeaways

  • The 14,300-year-old radiocarbon spike is the evidence of the largest solar storm to date.
  • Modern society is at risk, with such storms capable of decimating telecommunications, satellite systems, and electrical grids.
  • Understanding these solar phenomena is vital to safeguard our future technological infrastructure.

Studying the rings of ancient trees found near the Drouzet River in the Southern French Alps, a team of scientists, including the Collège de France, CEREGE, IMBE, Aix-Marseille University, and the University of Leeds, has unveiled a pivotal moment in Earth’s history. This significant radiocarbon surge was precisely dated to 14,300 years ago, connecting it with a monumental solar storm.

The preserved tree trunks, classified as subfossils, provided individual tree rings for meticulous analysis. By juxtaposing this radiocarbon surge with beryllium measurements from Greenland ice cores, the team deduced that an enormous solar storm was responsible for ejecting a vast amount of energetic particles into our atmosphere.

Professor Edouard Bard explained, “Radiocarbon is constantly being produced in the upper atmosphere through reactions triggered by cosmic rays. Extreme solar events, such as solar flares and coronal mass ejections, lead to short-term bursts of energetic particles, which manifest as massive radiocarbon spikes within a single year.”

Implications for Modern Society

Today, such gigantic solar storms pose a grave threat to our technologically-driven world. The repercussions of such an event could cripple our communication systems, disable satellites, and result in massive power outages, incurring billions in losses.


Professor Tim Heaton from the University of Leeds noted, “Super storms could permanently damage our electricity grid transformers, leading to prolonged blackouts. They would also damage the satellites essential for navigation and communication and impose severe radiation risks for astronauts.”

A Glimpse into Historical Solar Storms

To date, nine extreme solar storms, referred to as Miyake Events, have been recognized over the past 15,000 years. The most recent Miyake Events were documented in 993 AD and 774 AD. However, this recently discovered 14,300-year-old event dwarfs them, being nearly double their magnitude.

These events are enigmatic, having never been instrumentally observed directly. They underscore our limited understanding of the sun’s unpredictable nature, its potential dangers, and the need for increased research.

Professor Bard further explained, “Direct instrumental measurements of solar activity began only in the 17th century. Radiocarbon in tree rings, combined with beryllium in polar ice cores, is the most effective way to delve deeper into the sun’s historic behavior.”

Piecing Together the Solar History

The discovery of this colossal solar storm event also accentuates the significance of dendrochronology, a technique that assesses tree ring widths to understand past environmental shifts.


Associate Professor Cécile Miramont from Aix-en-Provence University said, “Discovering such a collection of preserved trees was remarkable. The dendrochronology technique allowed us to unearth invaluable details about solar activity in uncharted periods.”

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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