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A major X6.3 solar flare erupted from Active Region 3590 at 22:34 UTC on February 22, 2024. The event started at 22:08 UTC and ended at 22:43. This is now the second X-class solar flare of the day (UTC), the third in 24 hours, the strongest solar flare of Solar Cycle 25, and the 26th strongest since 1996. It follows X1.8 at 23:07 UTC on February 21 and X1.7 at 06:32 UTC on February 22, 2024. A 10cm Radio Burst lasting 11 minutes and with peak flux of 240 sfu was associated with the event. A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. Radio frequencies were forecast to be most degraded over the Pacific Ocean at the time of the flare.
