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Geomagnetic activity in December 1986
Mean Ap8.5No. 894 of 1138
G1+ days3
G3+ days0
Max Ap2223 Dec 1986
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 13 Dec 1986 | 5o | 12 | G1 |
| 14 Dec 1986 | 5- | 20 | G1 |
| 23 Dec 1986 | 5- | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1985 | 13.0 | 5 | 0 |
| December 1986 | 8.5 | 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 8.5 in December 1986, No. 894 of 1138 months since 1932; 3 days reached G1 or higher.