A G1 (Minor) storm watch is in effect for the 1-2 August, 2023 UTC days. A coronal mass ejection (CME), associated with a filament disappearance, erupted from the Sun late on 28 July. The CME was analyzed and model runs completed - with the majority of results suggesting an Earth-directed component is probable. While confidence in an Earth arrival is fair, timing and intensity are less certain. Should the CME arrive as anticipated, G1 storm levels are likely, with a chance for G2 (Moderate) levels beginning later in the evening of 31 July, with effects continuing into the overnight hours of 31 July-1 Aug (EDT). G1 levels remain possible into early 2 August as any CME influences continue, but weaken. Please visit our webpage for the latest information, forecasts, warnings, and alerts.
NOAA Scales mini
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.
G1 Watch for 1-2 August, 2023
G1 Watch for 1-2 August, 2023