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Geomagnetic activity in September 1951
Mean Ap39.9No. 5 of 1138
G1+ days21
G3+ days8
Max Ap11625 Sep 1951
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 Sep 1951 | 5- | 15 | G1 |
| 10 Sep 1951 | 5+ | 33 | G1 |
| 11 Sep 1951 | 7o | 40 | G3 |
| 12 Sep 1951 | 5+ | 34 | G1 |
| 13 Sep 1951 | 6+ | 47 | G2 |
| 14 Sep 1951 | 5o | 28 | G1 |
| 15 Sep 1951 | 6o | 40 | G2 |
| 16 Sep 1951 | 7- | 82 | G3 |
| 17 Sep 1951 | 6- | 49 | G2 |
| 18 Sep 1951 | 5o | 28 | G1 |
| 19 Sep 1951 | 8- | 59 | G4 |
| 20 Sep 1951 | 7+ | 106 | G3 |
| 21 Sep 1951 | 7o | 88 | G3 |
| 22 Sep 1951 | 7o | 85 | G3 |
| 23 Sep 1951 | 6o | 51 | G2 |
| 24 Sep 1951 | 6- | 42 | G2 |
| 25 Sep 1951 | 8+ | 116 | G4 |
| 26 Sep 1951 | 9- | 73 | G5 |
| 27 Sep 1951 | 6+ | 48 | G2 |
| 28 Sep 1951 | 6- | 14 | G2 |
| 29 Sep 1951 | 5+ | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1950 | 22.3 | 17 | 1 |
| September 1951 | 39.9 | 21 | 8 |
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 39.9 in September 1951, No. 5 of 1138 months since 1932; 21 days reached G1 or higher.