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Geomagnetic activity in December 1959
Mean Ap19.2No. 173 of 1138
G1+ days10
G3+ days1
Max Ap685 Dec 1959
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Dec 1959 | 5o | 28 | G1 |
| 2 Dec 1959 | 5o | 30 | G1 |
| 3 Dec 1959 | 6- | 50 | G2 |
| 5 Dec 1959 | 8- | 68 | G4 |
| 13 Dec 1959 | 5+ | 18 | G1 |
| 14 Dec 1959 | 5+ | 40 | G1 |
| 23 Dec 1959 | 6o | 28 | G2 |
| 26 Dec 1959 | 5- | 26 | G1 |
| 27 Dec 1959 | 6- | 38 | G2 |
| 28 Dec 1959 | 5+ | 40 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1958 | 15.3 | 7 | 3 |
| December 1959 | 19.2 | 10 | 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 19.2 in December 1959, No. 173 of 1138 months since 1932; 10 days reached G1 or higher.