Update: G4 (Severe) Geomagnetic Storm Alert Issued
published: Wednesday, January 21, 2026 17:13 UTC UTC
Update: G4 (Severe) geomagnetic storm levels were reached at 08:23 UTC (3:23 am EST) and at 10:21 UTC (05:21 EST).
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.