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Geomagnetic activity in September 1956
Mean Ap17.6No. 223 of 1138
G1+ days9
G3+ days2
Max Ap822 Sep 1956
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Sep 1956 | 8o | 82 | G4 |
| 3 Sep 1956 | 6+ | 48 | G2 |
| 6 Sep 1956 | 5- | 23 | G1 |
| 8 Sep 1956 | 8+ | 78 | G4 |
| 12 Sep 1956 | 5- | 10 | G1 |
| 13 Sep 1956 | 5+ | 17 | G1 |
| 20 Sep 1956 | 5+ | 29 | G1 |
| 21 Sep 1956 | 6o | 35 | G2 |
| 22 Sep 1956 | 5+ | 34 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1955 | 12.7 | 5 | 1 |
| September 1956 | 17.6 | 9 | 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 17.6 in September 1956, No. 223 of 1138 months since 1932; 9 days reached G1 or higher.