Update (Sunday Afternoon):
The Space Weather Prediction Center has issued a warning stating that a powerful Earth-directed coronal mass ejection, first detected on Saturday, is now causing one of the most significant solar radiation storms in over two decades.
“An S4 severe solar radiation storm is currently underway – this marks the largest solar radiation storm in more than 20 years. The last time S4 levels were observed was in October 2003. Potential impacts are primarily confined to space launch, aviation, and satellite operations,” as reported by SWPC.
Here are the potential disruptions caused by an S4 severe solar radiation storm:
Satellites and spacecraft
Possible damage to satellite electronics
Glitches, reboots, or loss of attitude control due to single event upsets
Decreased lifespan of satellites due to solar panel degradation
Increased drag on low Earth orbit satellites from atmospheric heating
Aviation
High radiation exposure for passengers and crew on polar routes
Possible rerouting of transpolar flights by airlines, leading to increased fuel costs and delays
Potential disruption to avionics relying on satellite navigation
GPS and navigation
Reduced GPS accuracy, particularly at high latitudes
Timing errors affecting precision systems such as financial networks, telecom syncing, and military operations
Communications
Intermittent HF radio blackouts affecting aviation, maritime, and military users
Loss of long-range radio communications in polar regions
An S4 solar radiation storm poses a significant threat to satellites, aviation, GPS, and the critical infrastructure supporting the modern world.
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The Space Weather Prediction Center has issued an alert following a powerful X1.9 solar flare eruption on the Sun, with expectations of an Earth-directed coronal mass ejection (CME) resulting from this space weather event.
Geophysicist and space weather forecaster Stefan Burns described the X1.9 flare as “insane” and predicted a significant coronal mass ejection.
Major X1.9 solar flare detected at 18:08 UTC (Jan 18) around AR 4341. Earth directed CME likely. More to follow. https://t.co/aqK4Q6XdAY pic.twitter.com/CJUq1SAsQt
— SolarHam (@SolarHam) January 18, 2026
“A significant coronal mass ejection has been launched towards Earth at high velocity. We are anticipating a major solar storm impact within 2 to 3 days, with at least G3 geomagnetic storm activity expected. Early forecasts may change as additional data becomes available,” Burns explained.
This 1.9 X-flare that just exploded on the Sun IS INSANE. A huge coronal mass ejection has been launched out towards Earth at high-velocity, we’ll have a BIG solar storm impact in 2-3 days, expect G3 geomagnetic storming minimum (early forecast liable to revision with more data). pic.twitter.com/v7uDX1JdIW
— Stefan Burns (@StefanBurnsGeo) January 18, 2026
Ben Davidson from Space Weather News conducted a live analysis on YouTube discussing the implications of the X-class solar flare and the potential impacts…
The X-class flare could immediately disrupt radio and navigation systems. However, the greater concern lies in the forthcoming CME, which could trigger geomagnetic storms affecting power grids, satellites, aviation, and the modern economy reliant on chips and data centers.
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