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Geomagnetic activity in May 2025
Mean Ap17.3No. 236 of 1138
G1+ days12
G3+ days0
Max Ap6229 May 2025
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 2025 | 5- | 27 | G1 |
| 2 May 2025 | 5o | 38 | G1 |
| 3 May 2025 | 5+ | 27 | G1 |
| 4 May 2025 | 5- | 27 | G1 |
| 5 May 2025 | 5- | 30 | G1 |
| 9 May 2025 | 5- | 16 | G1 |
| 10 May 2025 | 5- | 12 | G1 |
| 11 May 2025 | 5- | 15 | G1 |
| 17 May 2025 | 6+ | 39 | G2 |
| 18 May 2025 | 5- | 21 | G1 |
| 29 May 2025 | 6+ | 62 | G2 |
| 30 May 2025 | 5- | 29 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 2024 | 23.6 | 8 | 4 |
| May 2025 | 17.3 | 12 | 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 17.3 in May 2025, No. 236 of 1138 months since 1932; 12 days reached G1 or higher.