Geomagnetic storms today

On Wednesday, August 13, 2025, a kIndex level of 4 indicates a "quiet level" of geomagnetic activity. This means that while there is some fluctuation in the Earth's magnetic field, it remains within a relatively stable range. A kIndex of 4 suggests moderate geomagnetic activity, often resulting from solar wind disturbances but not reaching the threshold for significant geomagnetic storms. For weather-sensitive individuals, a kIndex of 4 generally has minimal impact compared to higher levels of geomagnetic activity. However, some people may still experience mild symptoms such as headaches, fatigue, or mood swings, as changes in the Earth's magnetic field can affect certain biological rhythms. Additionally, individuals with certain medical conditions, like those with pacemakers or other electronic implants, might want to be cautious, although significant effects are uncommon at this level. Overall, while a kIndex of 4 is relatively calm, it’s worth noting that sensitivity to geomagnetic changes can vary widely among individuals.