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Geomagnetic activity in December 1968
Mean Ap9.9No. 764 of 1138
G1+ days3
G3+ days0
Max Ap255 Dec 1968
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Dec 1968 | 5- | 21 | G1 |
| 5 Dec 1968 | 5+ | 25 | G1 |
| 25 Dec 1968 | 5o | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1967 | 14.1 | 8 | 0 |
| December 1968 | 9.9 | 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 9.9 in December 1968, No. 764 of 1138 months since 1932; 3 days reached G1 or higher.