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Geomagnetic activity in December 1966
Mean Ap11.6No. 620 of 1138
G1+ days7
G3+ days1
Max Ap4814 Dec 1966
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Dec 1966 | 5- | 19 | G1 |
| 5 Dec 1966 | 5- | 20 | G1 |
| 13 Dec 1966 | 5- | 20 | G1 |
| 14 Dec 1966 | 7o | 48 | G3 |
| 15 Dec 1966 | 5o | 18 | G1 |
| 26 Dec 1966 | 5- | 24 | G1 |
| 27 Dec 1966 | 5o | 34 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1965 | 7.1 | 2 | 0 |
| December 1966 | 11.6 | 7 | 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 11.6 in December 1966, No. 620 of 1138 months since 1932; 7 days reached G1 or higher.