Geomagnetic storm yesterday
Recap of yesterday's geomagnetic activity — peak Kp, when it peaked, and the verdict for that day. Comparison with today is at the bottom.
Yesterday, 04.06.2026, the planetary Kp index peaked at 2.67 (Quiet). Data: NOAA SWPC.
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Why this matters
If you felt off yesterday — headache, fatigue, pressure — you're probably not imagining it. The magnetic field does fluctuate and it does affect sensitive people. Check here after the fact.
If yesterday's peak was high (Kp 5+) your symptoms have an explanation. If not — look elsewhere: sleep, food, regular weather, stress.