NASA and researchers from the University of Leicester found that extreme solar storms could have far greater impacts on Earth than previously believed [1].
This discovery suggests that critical global infrastructure is more vulnerable to space weather than current models predict. Because modern society relies heavily on interconnected electronic systems, a significant solar event could trigger widespread failures in essential services.
The study, published in *Nature* this month, warns that these storms could disrupt satellites, communications, GPS, and power grids [1, 2, 3]. Researchers said that Earth’s natural magnetic protection may be less effective than previously thought, which allows geomagnetic storms to reach higher intensities [1, 3].
Such disruptions would be felt globally across technological systems and Earth's surface [1, 4]. The findings indicate that the planet's shield does not provide the level of security once assumed, leaving the world open to more severe atmospheric disturbances.
According to the research, the most extreme solar storms could be "once-in-a-thousand-year" events [4]. While these occurrences are rare, the potential for devastation to the electrical grid and satellite arrays makes them a critical point of concern for international security and disaster preparedness.
Scientists from the University of Leicester and NASA worked together to analyze how these storms interact with the magnetosphere [1, 5]. Their data suggests that the intensity of the impact on the ground is underestimated in previous scientific literature [1].
The researchers said that the risk is particularly acute for high-latitude regions and critical infrastructure that lacks hardened protection against geomagnetic induced currents [1, 3].
“Earth’s natural magnetic protection may be less effective than previously thought”
The study indicates a gap in the current understanding of planetary defense, suggesting that the 'worst-case scenario' for space weather is more severe than existing infrastructure is designed to handle. This may force governments to accelerate the hardening of power grids and rethink the redundancy of satellite-based communication systems to prevent a total collapse of digital services during a major solar event.
