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Geomagnetic activity in May 2026
Mean Ap9.8No. 772 of 1138
G1+ days4
G3+ days0
Max Ap3315 May 2026
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 May 2026 | 6o | 23 | G2 |
| 5 May 2026 | 5- | 11 | G1 |
| 15 May 2026 | 6o | 33 | G2 |
| 16 May 2026 | 6- | 32 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 2025 | 17.3 | 12 | 0 |
| May 2026 | 9.8 | 4 | 0 |
Dates and time slots are UTC. Kp is the 3-hourly planetary geomagnetic index (0–9); Ap is the daily average disturbance. G1–G5 follow the NOAA storm scale (Kp 5- and above counted as G1). Aurora visibility also depends on weather and location. The latest values are preliminary.
About this page
Mean Ap 9.8 in May 2026, No. 772 of 1138 months since 1932; 4 days reached G1 or higher.