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Geomagnetic storm on 1 Oct 1940 (G3)
Max Kp7oG3
Ap40No. 24 in 1940
Consecutive G1+ days1
Ap rank1,549since 1932
Kp by 3-hour slot (UTC)
4+
4+
3o
3+
4+
5+
7o
2o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 28 Sep 1940 | 6- | 42 | G2 |
| 29 Sep 1940 | 3o | 10 | – |
| 30 Sep 1940 | 4o | 8 | – |
| 1 Oct 1940 | 7o | 40 | G3 |
| 2 Oct 1940 | 4o | 13 | – |
| 3 Oct 1940 | 5- | 19 | G1 |
| 4 Oct 1940 | 4+ | 10 | – |
Highest-Ap days of 1940
189
187
184
128
126
100
98
78
70
66
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 7o, Ap 40: No. 1,549 of 34,615 days since 1932 by Ap.