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Geomagnetic activity in November 1939
Mean Ap8.7No. 875 of 1138
G1+ days3
G3+ days0
Max Ap4313 Nov 1939
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 13 Nov 1939 | 5+ | 43 | G1 |
| 14 Nov 1939 | 5- | 20 | G1 |
| 25 Nov 1939 | 5o | 25 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| November 1938 | 10.0 | 3 | 0 |
| November 1939 | 8.7 | 3 | 0 |
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
Mean Ap 8.7 in November 1939, No. 875 of 1138 months since 1932; 3 days reached G1 or higher.