What is extreme space weather?
The Sun releases charged particles and magnetic energy. During a severe geomagnetic storm, disturbances in Earth’s magnetic field can affect satellites, radio signals and long electrical conductors such as transmission lines.
These events are natural phenomena. Most solar activity does not cause serious disruption on the ground, but rare extreme events are included in national risk planning.
How could everyday life be affected?
Electricity networks
Geomagnetically induced currents can create additional stresses on high-voltage infrastructure and transformers.
Navigation and timing
Satellite navigation accuracy and systems relying on precise timing may be degraded during strong disturbances.
Radio and satellites
Some radio communications and satellite services may be interrupted or become less reliable.
Knock-on disruption
Prolonged infrastructure damage, if it occurred, could affect payments, transport and access to essential services.
Has this happened before?
In March 1989, a geomagnetic storm contributed to a major electricity blackout in Québec, Canada. It is a real example of how space weather can affect power infrastructure, though it does not establish that a similar outcome is inevitable in Britain.
What would a UK household notice?
In a severe scenario, you might first hear warnings from the Met Office or infrastructure operators, followed by temporary interruptions to power, navigation or communications. The effects would depend on the strength of the event and the resilience of particular networks.
Preparing sensibly
Follow Met Office space-weather information, keep devices charged when warnings are issued, and make a plan that does not rely entirely on mobile data, electronic payments or a single power source. Never operate a fuel-burning generator or barbecue indoors.
Turn information into a practical family plan
The planned Be Prepared Pack will bring household checklists, emergency contacts, water and food planning and printable worksheets into one organised digital workbook. Essential government advice remains free to access.
Planned price: £9.99. The product and checkout are not yet live.
Official guidance and further reading
Use these primary sources for current instructions and specialist information.