Geomagnetic storms 16 December 2025

On Tuesday, December 16, 2025, a kIndex of 3 indicates a quiet level of geomagnetic activity. The kIndex is a scale that measures the intensity of geomagnetic disturbances, ranging from 0 (very quiet) to 9 (extremely disturbed). A kIndex of 3 signifies minimal disturbances in the Earth’s magnetic field, meaning that the atmosphere is stable, and solar wind effects are minimal. Despite this quiet status, some weather-sensitive individuals, particularly those with conditions like migraines or fibromyalgia, may experience mild symptoms due to slight fluctuations in geomagnetic activity. However, the impact is generally minimal at this kIndex level. For most people, a kIndex of 3 poses no significant health risks, providing a normal baseline for daily activities. Those who are particularly attuned to these changes may find that their symptoms are stable, allowing for better overall well-being on this day. In summary, the kIndex of 3 reflects a period of calm geomagnetic conditions, which is unlikely to cause noticeable effects on the majority of the population.