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Geomagnetic activity in December 1946
Mean Ap9.1No. 830 of 1138
G1+ days3
G3+ days0
Max Ap2719 Dec 1946
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 19 Dec 1946 | 5+ | 27 | G1 |
| 21 Dec 1946 | 5- | 12 | G1 |
| 25 Dec 1946 | 5- | 11 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1945 | 13.1 | 9 | 1 |
| December 1946 | 9.1 | 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 9.1 in December 1946, No. 830 of 1138 months since 1932; 3 days reached G1 or higher.