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Geomagnetic storm on 4 Oct 1937 (G4)
Max Kp8-G4
Ap71No. 4 in 1937
Consecutive G1+ days2
Ap rank399since 1932
Kp by 3-hour slot (UTC)
7o
7+
8-
4o
3+
4-
3o
3+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Oct 1937 | 5+ | 29 | G1 |
| 2 Oct 1937 | 3+ | 7 | – |
| 3 Oct 1937 | 5+ | 25 | G1 |
| 4 Oct 1937 | 8- | 71 | G4 |
| 5 Oct 1937 | 3o | 8 | – |
| 6 Oct 1937 | 3+ | 10 | – |
| 7 Oct 1937 | 4+ | 23 | – |
Highest-Ap days of 1937
128
74
72
71
67
65
61
56
53
50
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 71: No. 399 of 34,615 days since 1932 by Ap.