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Geomagnetic storm on 21 Jul 1958 (G3)
Max Kp7+G3
Ap53No. 22 in 1958
Consecutive G1+ days6
Ap rank790since 1932
Kp by 3-hour slot (UTC)
3-
3o
4-
2+
2+
7-
7+
6+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 18 Jul 1958 | 5+ | 34 | G1 |
| 19 Jul 1958 | 5o | 25 | G1 |
| 20 Jul 1958 | 5- | 22 | G1 |
| 21 Jul 1958 | 7+ | 53 | G3 |
| 22 Jul 1958 | 5o | 20 | G1 |
| 23 Jul 1958 | 2+ | 6 | – |
| 24 Jul 1958 | 5- | 18 | G1 |
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 7+, Ap 53: No. 790 of 34,615 days since 1932 by Ap.