A colossal solar flare is set to hit Earth tomorrow, potentially triggering stunning northern lights and minor power disruptions. A coronal mass ejection (CME), a massive solar explosion that sends streams of charged particles into space, erupted from the sun at 1:39 p.m. yesterday.
Flare Classification and Impact
Space weather forecasters classified the plasma burst as an M5.8 (moderate) flare, the second most powerful category. The eruption originated from sunspot AR4436 and has already caused a radio blackout over the Atlantic Ocean. Although the CME is currently heading away from Earth, there is a chance it will graze our planet in the early hours of tomorrow, according to the Met Office. Additional flares could follow as the sunspot rotates into Earth's strike zone, meaning any subsequent ejections will be directed straight toward us.
Potential Effects on Technology
When solar particles interact with Earth's magnetic field, they generate a geomagnetic storm (solar storm). These storms induce electrical currents and magnetic fields that can damage spacecraft, pipelines, and railroad tracks, as well as disrupt power grids. Communication blackouts primarily affect high-frequency radio waves used by ham radio and commercial aviation. Meteorologist Jim NR Dale of British Weather Services explained that flares weaken radio waves due to ionization in the ionosphere, causing waves to be blocked and dispersed. In worst-case scenarios, flares can affect satellites, power grid outputs, and GPS. While mobile phones are generally safe, navigation systems may experience outages. Earth's magnetosphere can be peeled back, exposing satellites in high altitudes (like GPS satellites) to increased radiation. Low-Earth orbit satellites are better protected but may still suffer signal dropouts or reboots.
Expected Storm Level
Forecasters anticipate tomorrow's CME arrival will cause a G1-level geomagnetic storm, which is considered minor. Dale emphasized that G1 storms are not a major concern, whereas G4 or G5 storms are the significant events.
Northern Lights Forecast
One positive outcome of solar material hitting Earth is the creation of auroras. When particles interact with atmospheric gases, oxygen produces green or red light, while nitrogen yields blue and purple. The aurora borealis could be visible across northern Scotland tomorrow if skies are clear. AuroraWatch UK currently reports no significant geomagnetic activity. Solar activity follows an 11-year cycle and reached its peak (solar maximum) last year, leading to more frequent flares. This explains why auroras were seen as far south as London in 2025, as powerful solar storms drive auroras to lower latitudes.
Stay informed with updates on this developing space weather event.
