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Geomagnetic activity in December 1945
Mean Ap13.1No. 496 of 1138
G1+ days9
G3+ days1
Max Ap7014 Dec 1945
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 13 Dec 1945 | 5+ | 18 | G1 |
| 14 Dec 1945 | 7- | 70 | G3 |
| 19 Dec 1945 | 6o | 16 | G2 |
| 20 Dec 1945 | 5- | 25 | G1 |
| 21 Dec 1945 | 6- | 21 | G2 |
| 25 Dec 1945 | 5o | 21 | G1 |
| 26 Dec 1945 | 5- | 24 | G1 |
| 27 Dec 1945 | 5+ | 27 | G1 |
| 28 Dec 1945 | 5- | 24 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1944 | 13.6 | 6 | 1 |
| December 1945 | 13.1 | 9 | 1 |
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 13.1 in December 1945, No. 496 of 1138 months since 1932; 9 days reached G1 or higher.