Aurora & Space WeatherHome › Geomagnetic history › 1939
Geomagnetic storm on 5 Jul 1939 (G3)
Max Kp7+G3
Ap94No. 3 in 1939
Consecutive G1+ days4
Ap rank190since 1932
Kp by 3-hour slot (UTC)
5+
6+
6+
7-
7-
7+
6+
5-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jul 1939 | 3+ | 11 | – |
| 3 Jul 1939 | 7- | 45 | G3 |
| 4 Jul 1939 | 7- | 43 | G3 |
| 5 Jul 1939 | 7+ | 94 | G3 |
| 6 Jul 1939 | 5- | 17 | G1 |
| 7 Jul 1939 | 1o | 3 | – |
| 8 Jul 1939 | 3o | 5 | – |
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 94: No. 190 of 34,615 days since 1932 by Ap.