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Geomagnetic storm on 16 Apr 2025 (G4)
Max Kp8-G4
Ap75No. 4 in 2025
Consecutive G1+ days3
Ap rank358since 1932
Kp by 3-hour slot (UTC)
5o
3+
3o
5-
7+
6+
8-
5+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 13 Apr 2025 | 4- | 13 | – |
| 14 Apr 2025 | 5- | 18 | G1 |
| 15 Apr 2025 | 6+ | 30 | G2 |
| 16 Apr 2025 | 8- | 75 | G4 |
| 17 Apr 2025 | 4- | 9 | – |
| 18 Apr 2025 | 4+ | 13 | – |
| 19 Apr 2025 | 5- | 19 | G1 |
Highest-Ap days of 2025
137
98
81
75
74
69
69
62
60
57
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
Max Kp 8-, Ap 75: No. 358 of 34,615 days since 1932 by Ap.