G4 (Severe) Geomagnetic Storm Levels Reached 19 Jan, 2026
G4 Levels were first reached at 2:38pm EST (1938 UTC) on 19 January, 2026 upon CME shock arrival. CME passage is expected to continue through the evening with G4 levels remaining possible.
NOAA Scales mini
https://services.swpc.noaa.gov
Space Weather Conditions
24-Hour Observed Maximums
| R1-R2 | -- |
|---|---|
| R3-R5 | -- |
| S1 or greater | -- |
|---|
| R1-R2 | -- |
|---|---|
| R3-R5 | -- |
| S1 or greater | -- |
|---|
| R1-R2 | -- |
|---|---|
| R3-R5 | -- |
| S1 or greater | -- |
|---|
Current Space Weather Conditions
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.
published: Wednesday, January 21, 2026 17:12 UTC