Geomagnetic storms 21 November 2025

On Friday, November 21, 2025, a kIndex of 4 indicates a moderate level of geomagnetic activity. Although not as intense as higher levels, this status signifies that fluctuations in the Earth's magnetic field are occurring, which can be triggered by solar wind or coronal mass ejections. In this range, the geomagnetic activity typically does not lead to severe disturbances in electrical systems or satellite operations. For weather-sensitive individuals, such as those with migraines or other chronic conditions, a kIndex of 4 may still have some effects. Some studies suggest that changes in geomagnetic activity can influence mood and physical health, leading to increased fatigue, headaches, or anxiety in susceptible individuals. While the impacts are generally mild compared to higher kIndex levels, those who are particularly sensitive to environmental changes may notice a slight uptick in symptoms. Overall, while a kIndex of 4 represents a relatively quiet geomagnetic environment, it serves as a reminder of the subtle interplay between solar activity and human health.