G1 (Minor) Geomagnetic Storms Observed on 21 May 2016
published: Saturday, May 21, 2016 07:58 UTC
Minor (G1) geomagnetic storm conditions were observed at 21/0845 UTC and are expected to continue until 21/1300 UTC.
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.