R3 (Strong) HF Radio Blackout Event Observed
published: Tuesday, June 17, 2025 22:46 UTC
An R3 (Strong) radio blackout was observed at 21:49 on 17 Jun (UTC) due to an X1.2 flare from sunspot Region 4114.
R1 (Minor) Radio Blackout Impacts
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales
Navigation: Low-frequency navigation signals degraded for brief intervals.