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National Oceanic and Atmospheric Administration

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NOAA Scales mini

R1 (Minor) Radio Blackout Impacts
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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.
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G1 (Minor) Geomagnetic Storm Levels Observed

G1 (Minor) Geomagnetic Storm Levels Observed
published: Monday, April 25, 2016 11:31 UTC

G1 (Minor) geomagnetic storm levels were observed at 2204 UTC (1804 EDT) on 23 April due to the influence of a positive polarity coronal hole high speed stream. G1 (Minor) conditions are expected to persist for the next 7-8 hours. Stay tuned to spaceweather.gov for further updates.