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Geomagnetic activity in September 1946
Mean Ap34.3No. 10 of 1138
G1+ days13
G3+ days7
Max Ap19822 Sep 1946
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Sep 1946 | 5o | 20 | G1 |
| 16 Sep 1946 | 7o | 34 | G3 |
| 17 Sep 1946 | 6- | 29 | G2 |
| 18 Sep 1946 | 8- | 136 | G4 |
| 19 Sep 1946 | 7- | 58 | G3 |
| 21 Sep 1946 | 5+ | 22 | G1 |
| 22 Sep 1946 | 9o | 198 | G5 |
| 23 Sep 1946 | 8o | 146 | G4 |
| 24 Sep 1946 | 5+ | 21 | G1 |
| 27 Sep 1946 | 6o | 38 | G2 |
| 28 Sep 1946 | 7+ | 91 | G3 |
| 29 Sep 1946 | 7- | 36 | G3 |
| 30 Sep 1946 | 5+ | 35 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1945 | 9.7 | 6 | 0 |
| September 1946 | 34.3 | 13 | 7 |
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 34.3 in September 1946, No. 10 of 1138 months since 1932; 13 days reached G1 or higher.