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National Oceanic and Atmospheric Administration

Friday, July 25, 2025 07:22:03 UTC

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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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G2 Watch for 14 Jun 2025

G2 Watch for 14 Jun 2025
published: Sunday, June 15, 2025 16:29 UTC

A G2 (Moderate) Geomagnetic Storm Watch has been issued for 14 June 2025 (UTC day) due to the arrival of a Coronal Hole High Speed Stream (CH HSS). The associated CH produced upper level G2 (Moderate) geomagnetic storming conditions last rotation, giving moderate to high confidence in its ability to produce a similar magnitude this rotation.