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Geomagnetic activity in December 1971
Mean Ap10.0No. 752 of 1138
G1+ days2
G3+ days1
Max Ap6717 Dec 1971
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 17 Dec 1971 | 7+ | 67 | G3 |
| 18 Dec 1971 | 5o | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1970 | 8.9 | 3 | 1 |
| December 1971 | 10.0 | 2 | 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 10.0 in December 1971, No. 752 of 1138 months since 1932; 2 days reached G1 or higher.