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Geomagnetic activity in September 1937
Mean Ap9.1No. 832 of 1138
G1+ days3
G3+ days1
Max Ap3630 Sep 1937
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Sep 1937 | 6o | 18 | G2 |
| 11 Sep 1937 | 6- | 28 | G2 |
| 30 Sep 1937 | 7- | 36 | G3 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1936 | 4.8 | 0 | 0 |
| September 1937 | 9.1 | 3 | 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 9.1 in September 1937, No. 832 of 1138 months since 1932; 3 days reached G1 or higher.