Boulder, Colorado – A powerful solar flare is already disrupting high-frequency communications across parts of the United States, with impacts unfolding in real time for aviation, maritime, and emergency radio users early Monday.
According to NOAA’s Space Weather Prediction Center, an X1.5 solar flare erupted from an active sunspot region and peaked at 3:19 a.m. EDT Monday, triggering an R3-level radio blackout. These events can immediately degrade or completely block high-frequency (HF) radio signals on the sunlit side of Earth, with disruptions lasting from several minutes up to a few hours.
The impacts are most noticeable for transoceanic flights, marine operations, and amateur radio operators relying on HF bands. Signal loss or degraded communication quality may affect routes over North America, particularly during the early morning hours when the flare’s energy reached Earth-facing regions.
Forecasters are also analyzing a potential coronal mass ejection associated with the flare, which could lead to additional geomagnetic effects in the coming days if Earth-directed. No widespread power grid issues have been reported, but minor navigation or communication disruptions remain possible.
Operators relying on HF communications should prepare for intermittent outages and use backup systems where available. Additional space weather advisories may be issued as solar activity continues early this week.
