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Geomagnetic storm on 12 Sep 1986 (G5)
Max Kp9-G5
Ap89No. 3 in 1986
Consecutive G1+ days3
Ap rank227since 1932
Kp by 3-hour slot (UTC)
5+
9-
7+
6-
4+
4o
5-
5-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 Sep 1986 | 3- | 6 | – |
| 10 Sep 1986 | 2o | 6 | – |
| 11 Sep 1986 | 6- | 16 | G2 |
| 12 Sep 1986 | 9- | 89 | G5 |
| 13 Sep 1986 | 5- | 22 | G1 |
| 14 Sep 1986 | 4o | 12 | – |
| 15 Sep 1986 | 4o | 18 | – |
Highest-Ap days of 1986
202
100
89
82
67
67
49
46
43
43
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 9-, Ap 89: No. 227 of 34,615 days since 1932 by Ap.