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Geomagnetic storm on 4 May 1938 (G3)
Max Kp7oG3
Ap44No. 21 in 1938
Consecutive G1+ days1
Ap rank1,233since 1932
Kp by 3-hour slot (UTC)
4o
6-
4-
2o
4+
7o
5o
3+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1938 | 2+ | 4 | – |
| 2 May 1938 | 3- | 7 | – |
| 3 May 1938 | 4o | 16 | – |
| 4 May 1938 | 7o | 44 | G3 |
| 5 May 1938 | 4o | 19 | – |
| 6 May 1938 | 3+ | 12 | – |
| 7 May 1938 | 3o | 5 | – |
Highest-Ap days of 1938
136
128
120
107
103
100
76
67
67
62
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 44: No. 1,233 of 34,615 days since 1932 by Ap.