Geomagnetic storms 15 September 2025

A kIndex of 4 indicates a state of geomagnetic activity categorized as "quiet," reflecting moderate fluctuations in Earth’s magnetic field. This level suggests some disturbances occurring primarily due to solar wind and coronal mass ejections but typically remains below thresholds that would result in significant geomagnetic storms. For weather-sensitive individuals, such as those with certain medical conditions or those who experience sensitivity to atmospheric changes, a kIndex of 4 can result in mild impacts, primarily related to potential disruptions in sleep patterns, mood fluctuations, or increased fatigue. Some may experience headaches or migraines as changes in geomagnetic activity influence the body's bioelectrical systems. However, these effects are usually minimized and transient, with most people not noticing significant disruptions. Overall, while the geomagnetic activity is slightly elevated, it is unlikely to cause substantial weather-related health issues for the general population. Therefore, individuals sensitive to environmental changes might benefit from mindfulness in managing their health during this time.