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Geomagnetic storm on 11 Apr 1978 (G4)
Max Kp8-G4
Ap64No. 12 in 1978
Consecutive G1+ days6
Ap rank508since 1932
Kp by 3-hour slot (UTC)
8-
6+
5o
3o
4-
6-
5+
4+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Apr 1978 | 2o | 5 | – |
| 9 Apr 1978 | 3- | 6 | – |
| 10 Apr 1978 | 7+ | 36 | G3 |
| 11 Apr 1978 | 8- | 64 | G4 |
| 12 Apr 1978 | 7- | 29 | G3 |
| 13 Apr 1978 | 6- | 24 | G2 |
| 14 Apr 1978 | 6+ | 51 | G2 |
Highest-Ap days of 1978
124
109
96
94
89
88
85
83
82
80
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 8-, Ap 64: No. 508 of 34,615 days since 1932 by Ap.