Space Weather Update: G2 Watch & Current Conditions (Dec 2-5, 2025) (2025)

Space Weather Update: A G2 (Moderate) Watch is in Effect

The National Oceanic and Atmospheric Administration (NOAA) has issued a G2 (Moderate) Watch for the period of December 3rd to 4th, UTC. This watch is a precautionary measure due to the potential interaction between a nearby passing coronal mass ejection (CME) and an inbound coronal hole high-speed stream (CH HSS).

What does this mean for you? Well, it's important to stay informed about space weather, especially if you're an astronaut, satellite operator, or someone who relies on radio communication or navigation systems. Here's a breakdown of the potential impacts:

  • HF Radio Communication: You might experience minor degradation in HF radio communication on the sunlit side of Earth. This could lead to occasional loss of radio contact, which is a concern for long-range communication.
  • Navigation: Low-frequency navigation signals may be degraded for brief intervals, affecting the accuracy of navigation systems.

For more detailed information about the NOAA Space Weather Scales and how they are determined, visit https://www.spaceweather.gov/noaa-scales-explanation.

Stay tuned to http://spaceweather.gov/ for the latest updates on this space weather story and other important space weather events.

Space Weather Update: G2 Watch & Current Conditions (Dec 2-5, 2025) (2025)
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