Key Metrics
16.8
Heat Index-
Impact LevelMedium
-
Scope LevelGlobal
-
Last Update2025-11-11
Key Impacts
Positive Impacts (1)
Negative Impacts (5)
Event Overview
A severe geomagnetic storm watch highlights the potential disruptions from coronal mass ejections. The event underscores the significant impact of solar activity on Earth's magnetic field, with implications for communication and power systems.
Collect Records
G4 (Severe) Geomagnetic Storm Watch Issued for November 12
The Space Weather Prediction Center has issued a G4 (Severe) geomagnetic storm watch for November 12, with additional watches for a G2 (Moderate) storm on November 11 and a G3 (Strong) storm on November 13. These watches are in response to potential effects from coronal mass ejections (CME). A significant CME, linked to an X5.1 solar flare (R3 - Strong) that peaked at 10:04 UTC on November 11, occurred early on November 12. This CME also triggered a moderate (S2) solar radiation storm that is ongoing. The recent CMEs are primarily directed north and ahead of Earth's orbit, with earlier CMEs expected to influence Earth before the November 12th CME arrives. There is high confidence that the latest CME will affect Earth, though the exact timing and intensity will be clearer once it is within 1 million miles of Earth. The SWPC forecasts a potential for G4-level space weather upon the arrival and passage of the CME, advising people to stay aware of space weather and follow updates on their website. Northern lights may be visible in 21 US states.