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Geomagnetic storm on 4 Sep 1958 (G5)
Max Kp9-G5
Ap131No. 3 in 1958
Consecutive G1+ days3
Ap rank75since 1932
Kp by 3-hour slot (UTC)
5o
4+
3+
4-
7+
9-
8+
8+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Sep 1958 | 3- | 5 | – |
| 2 Sep 1958 | 2- | 5 | – |
| 3 Sep 1958 | 7- | 64 | G3 |
| 4 Sep 1958 | 9- | 131 | G5 |
| 5 Sep 1958 | 8o | 71 | G4 |
| 6 Sep 1958 | 2+ | 6 | – |
| 7 Sep 1958 | 4o | 16 | – |
Highest-Ap days of 1958
200
199
131
103
89
85
82
82
77
75
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 131: No. 75 of 34,615 days since 1932 by Ap.