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Geomagnetic activity in September 1961
Mean Ap12.8No. 518 of 1138
G1+ days7
G3+ days1
Max Ap4224 Sep 1961
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Sep 1961 | 5- | 28 | G1 |
| 12 Sep 1961 | 5o | 17 | G1 |
| 14 Sep 1961 | 6o | 28 | G2 |
| 24 Sep 1961 | 6o | 42 | G2 |
| 25 Sep 1961 | 6o | 35 | G2 |
| 27 Sep 1961 | 5- | 26 | G1 |
| 30 Sep 1961 | 8o | 36 | G4 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1960 | 20.5 | 14 | 3 |
| September 1961 | 12.8 | 7 | 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 12.8 in September 1961, No. 518 of 1138 months since 1932; 7 days reached G1 or higher.