What to Expect from Magnetic Storms on June 17–18
On June 17–18, periods of increased geomagnetic activity are expected, which may affect the well-being of weather-sensitive individuals. In particular, headaches, fatigue, fluctuations in atmospheric pressure, and increased stress levels are possible.
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 Wednesday, June 17, solar activity with a K-index of 4 (yellow level) is expected, which corresponds to moderate magnetic storms.
On Thursday, June 18, solar activity with a K-index of 3.3 (green level) is expected, which corresponds to weak magnetic storms.
It is important to note that magnetic storm forecasts may change, as solar activity researchers update their data every three hours.
Read also:
Magnetic Storm Calendar for June 2026: How to Prepare for Geomagnetic Fluctuations
Retrograde Planets in June 2026: What to Watch For
