Geomagnetic storms 5 December 2025

On Friday, December 5, 2025, a geomagnetic activity level (kIndex) of 4 indicates a moderate level of geomagnetic disturbance. Generally classified as a quiet to unsettled level, this kIndex suggests that while the Earth’s magnetic field is experiencing some fluctuations, it is not reaching levels that would significantly disrupt technology or natural phenomena. For weather-sensitive individuals, a kIndex of 4 may lead to mild effects. Some people report experiencing increased fatigue, headaches, or mood swings during periods of geomagnetic disturbances, although scientific consensus on these effects remains varied. Those particularly sensitive to changes in their environment, such as individuals with certain medical conditions or heightened electromagnetic sensitivity, might notice slight discomfort or changes in their overall well-being. In summary, while a kIndex of 4 is considered relatively benign, it could potentially impact some weather-sensitive individuals. It's advisable for them to monitor their symptoms and take necessary precautions during such periods to maintain their comfort and health.