A new study published in Communications Earth & Environment suggests that space storms, which have the potential to disrupt power grids, communication systems, and satellites, may occur more frequently than previously thought. Scientists reached this conclusion by examining tree rings from ancient European trees, some nearly 2,000 years old. These tree rings provided a natural record of past environmental changes, including those caused by cosmic events. Carbon 14, a radioactive isotope, is typically produced in the atmosphere when cosmic rays interact with nitrogen atoms. When solar storms or other space weather events occur, they can increase the production of carbon 14. By analyzing the levels of this isotope in tree rings, researchers can detect past solar activity. The study found four instances where carbon 14 levels spiked significantly, suggesting that these events were neither ordinary solar storms nor the most extreme space weather phenomena ever recorded, but something in between. These intermediate events, as the researchers call them, could have the potential to cause disruptions similar to the famous 1921 solar storm, which caused widespread power outages and telegraph system failures across the globe. However, because these events are less extreme than the largest recorded space storms, they might be more frequent and harder to predict. Understanding their frequency and impact is crucial for preparing modern infrastructure against potential future disruptions. The findings highlight the importance of studying historical records to better understand space weather patterns. As technology becomes increasingly reliant on satellites and digital networks, the need for improved forecasting and preparedness against space storms is more urgent than ever. This study adds a new layer of understanding to the complex relationship between solar activity and Earth’s technological systems.