NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Tuesday, May 20, 2025 13:55:51 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

Minor (G1) Geomagnetic Storms Observed - 27 Sep 2016

Minor (G1) Geomagnetic Storms Observed - 27 Sep 2016
published: Tuesday, September 27, 2016 06:36 UTC

Minor (G1) geomagnetic storm conditions were observed at 27/0119 UTC. A G1 Warning remains in effect until 27/0900 UTC. This elevated geomagnetic activity is due to sustained periods of southward interplanetary magnetic field.