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Geomagnetic storm on 1 May 1939 (G3)
Max Kp7-G3
Ap56No. 17 in 1939
Consecutive G1+ days3
Ap rank697since 1932
Kp by 3-hour slot (UTC)
2o
1+
3+
6o
7-
5-
6+
6+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 28 Apr 1939 | 4+ | 16 | – |
| 29 Apr 1939 | 4- | 15 | – |
| 30 Apr 1939 | 4- | 8 | – |
| 1 May 1939 | 7- | 56 | G3 |
| 2 May 1939 | 6+ | 48 | G2 |
| 3 May 1939 | 5- | 23 | G1 |
| 4 May 1939 | 3- | 8 | – |
Highest-Ap days of 1939
135
133
94
92
89
89
88
79
74
73
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 56: No. 697 of 34,615 days since 1932 by Ap.