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Geomagnetic activity in April 2025
Mean Ap17.6No. 224 of 1138
G1+ days11
G3+ days1
Max Ap7516 Apr 2025
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Apr 2025 | 5- | 21 | G1 |
| 4 Apr 2025 | 5- | 32 | G1 |
| 5 Apr 2025 | 6- | 40 | G2 |
| 6 Apr 2025 | 5o | 21 | G1 |
| 9 Apr 2025 | 5- | 20 | G1 |
| 14 Apr 2025 | 5- | 18 | G1 |
| 15 Apr 2025 | 6+ | 30 | G2 |
| 16 Apr 2025 | 8- | 75 | G4 |
| 19 Apr 2025 | 5- | 19 | G1 |
| 20 Apr 2025 | 5o | 13 | G1 |
| 21 Apr 2025 | 5+ | 34 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2024 | 9.7 | 3 | 1 |
| April 2025 | 17.6 | 11 | 1 |
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 17.6 in April 2025, No. 224 of 1138 months since 1932; 11 days reached G1 or higher.