Aurora & Space WeatherHome › Geomagnetic history › 2024
Geomagnetic activity in September 2024
Mean Ap15.3No. 344 of 1138
G1+ days4
G3+ days2
Max Ap7112 Sep 2024
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 Sep 2024 | 7o | 71 | G3 |
| 13 Sep 2024 | 6o | 35 | G2 |
| 17 Sep 2024 | 7+ | 71 | G3 |
| 25 Sep 2024 | 5- | 29 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 2023 | 14.2 | 9 | 0 |
| September 2024 | 15.3 | 4 | 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 15.3 in September 2024, No. 344 of 1138 months since 1932; 4 days reached G1 or higher.