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Geomagnetic storm on 21 Dec 2015 (G3)
Max Kp7-G3
Ap38No. 17 in 2015
Consecutive G1+ days2
Ap rank1,834since 1932
Kp by 3-hour slot (UTC)
7-
6o
5o
4-
3o
2+
1+
3o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 18 Dec 2015 | 3- | 5 | – |
| 19 Dec 2015 | 4o | 10 | – |
| 20 Dec 2015 | 7- | 70 | G3 |
| 21 Dec 2015 | 7- | 38 | G3 |
| 22 Dec 2015 | 4+ | 12 | – |
| 23 Dec 2015 | 3+ | 9 | – |
| 24 Dec 2015 | 3+ | 11 | – |
Highest-Ap days of 2015
108
74
72
70
60
59
57
52
47
46
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 38: No. 1,834 of 34,615 days since 1932 by Ap.