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Geomagnetic activity in September 1969
Mean Ap15.0No. 358 of 1138
G1+ days8
G3+ days3
Max Ap9030 Sep 1969
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 Sep 1969 | 5- | 18 | G1 |
| 6 Sep 1969 | 5- | 20 | G1 |
| 8 Sep 1969 | 5o | 19 | G1 |
| 15 Sep 1969 | 5- | 19 | G1 |
| 18 Sep 1969 | 5- | 19 | G1 |
| 28 Sep 1969 | 7o | 47 | G3 |
| 29 Sep 1969 | 7o | 71 | G3 |
| 30 Sep 1969 | 8o | 90 | G4 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1968 | 13.8 | 7 | 0 |
| September 1969 | 15.0 | 8 | 3 |
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 15.0 in September 1969, No. 358 of 1138 months since 1932; 8 days reached G1 or higher.