Geomagnetic storms today

On Thursday, December 25, 2025, a geomagnetic activity level (kIndex) of 4 indicates a moderate level of disturbance in the Earth's magnetic field. While this level suggests some fluctuations, it is generally considered as a quiet state, with limited influence on day-to-day life. Typically, geomagnetic activity is classified on a scale from 0 to 9, with 0 being completely calm and 9 being a severe geomagnetic storm. For weather-sensitive individuals, a kIndex of 4 may lead to slight impacts, particularly for those with certain health conditions or sensitivities to electromagnetic changes. Individuals with migraines or specific mental health disorders, such as bipolar disorder, may report increased symptoms or headaches during periods of moderate geomagnetic activity. People who are particularly attuned to environmental changes might experience mild emotional fluctuations or sleep disturbances. Overall, while a kIndex of 4 is not alarming, those sensitive to geomagnetic changes should monitor their well-being and consider practical adjustments to their routines if necessary.