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Geomagnetic activity in September 1959
Mean Ap28.3No. 31 of 1138
G1+ days19
G3+ days4
Max Ap1034 Sep 1959
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Sep 1959 | 5+ | 34 | G1 |
| 3 Sep 1959 | 8- | 39 | G4 |
| 4 Sep 1959 | 7+ | 103 | G3 |
| 5 Sep 1959 | 6- | 34 | G2 |
| 6 Sep 1959 | 6- | 18 | G2 |
| 12 Sep 1959 | 5- | 14 | G1 |
| 13 Sep 1959 | 5+ | 14 | G1 |
| 15 Sep 1959 | 5- | 18 | G1 |
| 16 Sep 1959 | 5- | 16 | G1 |
| 17 Sep 1959 | 5o | 23 | G1 |
| 18 Sep 1959 | 5o | 27 | G1 |
| 19 Sep 1959 | 6o | 36 | G2 |
| 20 Sep 1959 | 6+ | 61 | G2 |
| 21 Sep 1959 | 7o | 86 | G3 |
| 22 Sep 1959 | 7o | 73 | G3 |
| 23 Sep 1959 | 5o | 24 | G1 |
| 24 Sep 1959 | 5o | 24 | G1 |
| 25 Sep 1959 | 6- | 37 | G2 |
| 26 Sep 1959 | 5- | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1958 | 20.5 | 9 | 4 |
| September 1959 | 28.3 | 19 | 4 |
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 28.3 in September 1959, No. 31 of 1138 months since 1932; 19 days reached G1 or higher.