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National Oceanic and Atmospheric Administration

Thursday, May 15, 2025 01:00:15 UTC

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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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G3 (Strong) Geomagnetic Storm Conditions Observed on 19 Sep 2023

G3 (Strong) Geomagnetic Storm Conditions Observed on 19 Sep 2023
published: Wednesday, September 20, 2023 06:42 UTC

G3 (Strong) geomagnetic storming was briefly observed on 19 Sep at 0559 UTC with persistent CME influences. Conditions have since improved and generally active to G1 (Minor) storm levels are forecast through the remainder of the day (19 Sep). Impacts, including aurora sightings, can be reported at swpc.customersupport@noaa.gov.