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Geomagnetic storm on 15 Sep 2025 (G3)
Max Kp7-G3
Ap48No. 11 in 2025
Consecutive G1+ days2
Ap rank1,054since 1932
Kp by 3-hour slot (UTC)
7-
6-
5-
5-
5+
4-
4-
4o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 Sep 2025 | 3- | 6 | – |
| 13 Sep 2025 | 3- | 5 | – |
| 14 Sep 2025 | 5- | 11 | G1 |
| 15 Sep 2025 | 7- | 48 | G3 |
| 16 Sep 2025 | 4+ | 17 | – |
| 17 Sep 2025 | 3o | 10 | – |
| 18 Sep 2025 | 2+ | 6 | – |
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 7-, Ap 48: No. 1,054 of 34,615 days since 1932 by Ap.