G4 (Severe) Watch in Effect for 12 November
11 days ago
- #geomagnetic storm
- #space weather
- #CME
- Geomagnetic Storm Watches are in effect, including a G4 (Severe) potential for 12 November.
- Current Watches: 11 Nov (G2 - Moderate), 12 Nov (G4 - Severe), 13 Nov (G3 - Strong).
- Watches are due to coronal mass ejections (CMEs) from the Sun, including an X5.1 solar flare on 11 Nov.
- The latest CME is the most energetic and fastest, with high confidence in Earth impact but moderate timing certainty.
- G4 levels are possible upon CME arrival or during its passage.
- HF Radio: Weak or minor degradation on the sunlit side, occasional loss of contact.
- Navigation: Low-frequency signals degraded briefly.
- Monitor updates at spaceweather.gov.