Network Rail is racing to protect Britain's railway network from solar storms that could cripple signalling systems and strand millions of passengers across the country. The rail infrastructure giant is implementing emergency safeguards ahead of an expected surge in dangerous space weather as the Sun approaches its most active phase around 2025.
Solar flares and coronal mass ejections from the Sun can trigger geomagnetic storms that induce powerful electrical currents in railway tracks and power lines. These currents threaten the precise electrical systems that control Britain's signals, as well as power supplies and communication networks essential for safe train operations.
The threat is real and historically devastating. The 1859 Carrington Event caused telegraph systems to fail worldwide and sparked fires across communication networks. A similar event today could bring Britain's transport system to a standstill, affecting millions of daily rail passengers who depend on the network for work and essential journeys.
Network Rail's preparations involve detailed analysis of vulnerable infrastructure, including signalling equipment and power systems most at risk from geomagnetically induced currents. The company is installing protective devices and developing robust contingency plans to manage potential disruptions across its 20,000-mile network.
The rail operator is working closely with meteorological agencies and other critical infrastructure providers to share space weather forecasts and coordinate emergency responses. The goal is ensuring passenger safety whilst maintaining services during what scientists warn could be the most severe solar activity in decades.