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Geomagnetic activity in September 1966
Mean Ap21.0No. 131 of 1138
G1+ days7
G3+ days2
Max Ap1124 Sep 1966
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Sep 1966 | 5o | 22 | G1 |
| 3 Sep 1966 | 9- | 92 | G5 |
| 4 Sep 1966 | 9- | 112 | G5 |
| 6 Sep 1966 | 5- | 24 | G1 |
| 8 Sep 1966 | 6- | 42 | G2 |
| 15 Sep 1966 | 5- | 20 | G1 |
| 28 Sep 1966 | 5o | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1965 | 10.1 | 3 | 0 |
| September 1966 | 21.0 | 7 | 2 |
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 21.0 in September 1966, No. 131 of 1138 months since 1932; 7 days reached G1 or higher.