NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Tuesday, April 15, 2025 18:31:08 UTC

Main menu

NOAA Scales mini

R1 (Minor) Radio Blackout Impacts
close
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

G4 (Severe) Geomagnetic Storm Alert Threshold Reached at 1241 ET

G4 (Severe) Geomagnetic Storm Alert Threshold Reached at 1241 ET
G4 (Severe) Geomagnetic Storm Alert Threshold Reached at 1241 ET
published: Thursday, January 02, 2025 21:05 UTC

The G4 (Severe) Geomagnetic Storm Alert threshold was reached on January 1st, 2025 at 1241 ET due to continued effects from the CME's that left the Sun on December 29th. Stay tuned for updates!