Magnetic Storms on July 17–18 and the Solar Activity Forecast
Solar activity in the coming days may affect the geomagnetic conditions on Earth. On July 17–18, changes in magnetic fluctuations are expected, which some people may experience as a decline in well-being, such as fatigue or headaches.
Geomagnetic activity is measured on a scale from 0 to 9. The planetary K-index is used to indicate this; a reading of 5 or higher indicates a strong magnetic storm.
On Friday, July 17, solar activity with a K-index of 2.7 (green level) is expected, corresponding to weak magnetic storms.
On Saturday, July 18, solar activity with a K-index of 1.7 (green level) is expected, which corresponds to weak magnetic storms.
It is important to note that magnetic storm forecasts are subject to change, as solar activity researchers update their data every three hours.
Source: NOAA Space Weather Prediction Center (SWPC)
As a reminder, several periods of solar activity are expected in July 2026, which may affect the well-being of weather-sensitive individuals and the operation of electronic devices.
