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Geomagnetic activity in December 1979
Mean Ap9.0No. 839 of 1138
G1+ days2
G3+ days0
Max Ap3229 Dec 1979
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 29 Dec 1979 | 5o | 32 | G1 |
| 30 Dec 1979 | 5- | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1978 | 13.2 | 9 | 0 |
| December 1979 | 9.0 | 2 | 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 9.0 in December 1979, No. 839 of 1138 months since 1932; 2 days reached G1 or higher.