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Geomagnetic activity in December 1942
Mean Ap10.6No. 692 of 1138
G1+ days5
G3+ days0
Max Ap3321 Dec 1942
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 Dec 1942 | 5+ | 22 | G1 |
| 10 Dec 1942 | 5+ | 23 | G1 |
| 21 Dec 1942 | 5o | 33 | G1 |
| 23 Dec 1942 | 5o | 31 | G1 |
| 26 Dec 1942 | 5- | 24 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1941 | 11.3 | 3 | 1 |
| December 1942 | 10.6 | 5 | 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 10.6 in December 1942, No. 692 of 1138 months since 1932; 5 days reached G1 or higher.