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Geomagnetic activity in September 1949
Mean Ap12.7No. 532 of 1138
G1+ days9
G3+ days0
Max Ap383 Sep 1949
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Sep 1949 | 5- | 21 | G1 |
| 3 Sep 1949 | 6o | 38 | G2 |
| 12 Sep 1949 | 6- | 28 | G2 |
| 14 Sep 1949 | 5+ | 17 | G1 |
| 24 Sep 1949 | 5+ | 14 | G1 |
| 25 Sep 1949 | 5o | 32 | G1 |
| 26 Sep 1949 | 5- | 20 | G1 |
| 27 Sep 1949 | 5- | 24 | G1 |
| 30 Sep 1949 | 5- | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1948 | 14.9 | 12 | 0 |
| September 1949 | 12.7 | 9 | 0 |
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 12.7 in September 1949, No. 532 of 1138 months since 1932; 9 days reached G1 or higher.