Strongest Solar Flare of Cycle 25
spaceweather.gov
spaceweather.gov
> Radio communication interference with aircraft were reported by multiple NWS Center Weather Service Units (CWSU) co-located at FAA facilities. These impacts were felt from one end of the Nation to the other.
On the X-ray flux scale, this reaches halfway up the X-class for flares [0]. It doesn't get any higher than X-class, and this is a logarithmic scale. Huge indeed.